[392] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Hotkey Bar related functions. |
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| 3 | |
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| 4 | ; |
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[399] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[392] | 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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[399] | 12 | ; |
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[392] | 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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[399] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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[392] | 19 | |
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| 20 | ; Section containing code |
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| 21 | SECTION .text |
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| 22 | |
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[599] | 23 | |
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[392] | 24 | ;-------------------------------------------------------------------- |
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[604] | 25 | ; Handler for INT 08h System Timer Tick. |
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[599] | 26 | ; Reads key presses and draws hotkey bar. |
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| 27 | ; |
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| 28 | ; HotkeyBar_TimerTickHandler |
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| 29 | ; Parameters: |
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[603] | 30 | ; Nothing |
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[599] | 31 | ; Returns: |
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| 32 | ; Nothing |
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| 33 | ; Corrupts registers: |
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[601] | 34 | ; Nothing |
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[599] | 35 | ;-------------------------------------------------------------------- |
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[601] | 36 | ALIGN JUMP_ALIGN |
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[599] | 37 | HotkeyBar_TimerTickHandler: |
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| 38 | push es |
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[603] | 39 | %ifndef USE_186 ; LOAD_BDA_SEGMENT_TO will corrupt AX on 8088/8086 |
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[599] | 40 | push ax |
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| 41 | %endif |
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| 42 | LOAD_BDA_SEGMENT_TO es, ax |
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| 43 | |
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| 44 | ; Call previous handler |
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| 45 | pushf |
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[601] | 46 | call FAR [es:BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler] |
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[599] | 47 | |
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[600] | 48 | ; Update Hotkeybar (process key input and draw) every fourth tick |
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| 49 | test BYTE [es:BDA.dwTimerTicks], 11b |
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[599] | 50 | jnz SHORT .ReturnFromHandler |
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| 51 | |
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[603] | 52 | push ds |
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[599] | 53 | %ifdef USE_186 |
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[603] | 54 | pusha |
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[599] | 55 | %else |
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[603] | 56 | push di |
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| 57 | push si |
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| 58 | push dx |
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| 59 | push cx |
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| 60 | %endif |
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| 61 | call RamVars_GetSegmentToDS |
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| 62 | call HotkeyBar_UpdateDuringDriveDetection |
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| 63 | %ifdef USE_186 |
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| 64 | popa |
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| 65 | %else |
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[599] | 66 | pop cx |
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| 67 | pop dx |
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| 68 | pop si |
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| 69 | pop di |
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| 70 | %endif |
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| 71 | pop ds |
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[603] | 72 | |
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| 73 | .ReturnFromHandler: |
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| 74 | %ifndef USE_186 |
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| 75 | pop ax |
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| 76 | %endif |
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[599] | 77 | pop es |
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| 78 | iret |
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| 79 | |
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| 80 | |
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| 81 | ;-------------------------------------------------------------------- |
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[528] | 82 | ; Scans key presses and draws any hotkey changes. |
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| 83 | ; |
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[392] | 84 | ; HotkeyBar_UpdateDuringDriveDetection |
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| 85 | ; Parameters: |
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| 86 | ; DS: RAMVARS segment |
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| 87 | ; ES: BDA segment (zero) |
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| 88 | ; Returns: |
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| 89 | ; Nothing |
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| 90 | ; Corrupts registers: |
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| 91 | ; AX, CX, DX, SI, DI |
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| 92 | ;-------------------------------------------------------------------- |
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[603] | 93 | HotkeyBar_UpdateDuringDriveDetection: |
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[528] | 94 | call ScanHotkeysFromKeyBufferAndStoreToBootvars |
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[599] | 95 | |
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| 96 | ; If ESC pressed, abort detection by forcing timeout |
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| 97 | cmp al, ESC_SCANCODE |
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| 98 | jne SHORT .ContinueDrawing |
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| 99 | mov BYTE [RAMVARS.bTimeoutTicksLeft], 0 |
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| 100 | .ContinueDrawing: |
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[392] | 101 | ; Fall to HotkeyBar_DrawToTopOfScreen |
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[505] | 102 | |
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| 103 | |
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[392] | 104 | ;-------------------------------------------------------------------- |
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| 105 | ; HotkeyBar_DrawToTopOfScreen |
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| 106 | ; Parameters: |
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| 107 | ; DS: RAMVARS segment |
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| 108 | ; ES: BDA segment (zero) |
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| 109 | ; Returns: |
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| 110 | ; Nothing |
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| 111 | ; Corrupts registers: |
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| 112 | ; AX, CX, DX, SI, DI |
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| 113 | ;-------------------------------------------------------------------- |
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| 114 | HotkeyBar_DrawToTopOfScreen: |
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[603] | 115 | ; Store current screen coordinates to stack |
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| 116 | ; (to be restored when Hotkey Bar is rendered) |
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| 117 | CALL_DISPLAY_LIBRARY GetSoftwareCoordinatesToAX |
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[392] | 118 | push ax |
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| 119 | |
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[603] | 120 | ; Move cursor to top left corner (0, 0) |
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[604] | 121 | mov ax, es |
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[603] | 122 | call HotkeyBar_SetCursorCoordinatesFromAX |
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[392] | 123 | ; Fall to .PrintFloppyDriveHotkeys |
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| 124 | |
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| 125 | ;-------------------------------------------------------------------- |
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| 126 | ; .PrintFloppyDriveHotkeys |
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| 127 | ; Parameters: |
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| 128 | ; DS: RAMVARS segment |
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| 129 | ; ES: BDA segment (zero) |
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| 130 | ; Returns: |
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| 131 | ; Nothing |
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| 132 | ; Corrupts registers: |
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| 133 | ; AX, CX, DX, SI, DI |
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| 134 | ;-------------------------------------------------------------------- |
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| 135 | .PrintFloppyDriveHotkeys: |
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| 136 | call FloppyDrive_GetCountToAX |
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[568] | 137 | xchg cx, ax ; Any Floppy Drives? |
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| 138 | jcxz .SkipFloppyDriveHotkeys |
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[392] | 139 | |
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[492] | 140 | mov ax, (ANGLE_QUOTE_RIGHT << 8) | DEFAULT_FLOPPY_DRIVE_LETTER |
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[500] | 141 | mov cl, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bFddLetter] |
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[492] | 142 | mov di, g_szFDD |
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[593] | 143 | |
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| 144 | ; Clear CH if floppy drive is selected for boot |
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[601] | 145 | %if 0 ; Not needed until more flags added |
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| 146 | mov ch, FLG_HOTKEY_HD_FIRST |
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| 147 | and ch, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bFlags] |
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| 148 | %else |
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[593] | 149 | mov ch, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bFlags] |
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[601] | 150 | %endif |
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[392] | 151 | call FormatDriveHotkeyString |
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| 152 | |
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| 153 | .SkipFloppyDriveHotkeys: |
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| 154 | ; Fall to .PrintHardDriveHotkeys |
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| 155 | |
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| 156 | ;-------------------------------------------------------------------- |
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| 157 | ; .PrintHardDriveHotkeys |
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| 158 | ; Parameters: |
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| 159 | ; DS: RAMVARS segment |
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| 160 | ; ES: BDA segment (zero) |
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| 161 | ; Returns: |
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| 162 | ; Nothing |
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| 163 | ; Corrupts registers: |
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| 164 | ; AX, CX, DX, SI, DI |
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| 165 | ;-------------------------------------------------------------------- |
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[547] | 166 | call BootVars_GetLetterForFirstHardDriveToAX |
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[392] | 167 | mov ah, ANGLE_QUOTE_RIGHT |
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[596] | 168 | mov cx, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wHddLetterAndFlags] ; Letter to CL, flags to CH |
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[600] | 169 | ;and ch, FLG_HOTKEY_HD_FIRST ; Not needed until more flags added |
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[593] | 170 | xor ch, FLG_HOTKEY_HD_FIRST ; Clear CH if HD is selected for boot, set otherwise |
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[492] | 171 | mov di, g_szHDD |
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[392] | 172 | call FormatDriveHotkeyString |
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| 173 | ; Fall to .PrintBootMenuHotkey |
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| 174 | |
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| 175 | ;-------------------------------------------------------------------- |
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| 176 | ; .PrintBootMenuHotkey |
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| 177 | ; Parameters: |
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| 178 | ; ES: BDA segment (zero) |
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| 179 | ; Returns: |
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| 180 | ; Nothing |
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| 181 | ; Corrupts registers: |
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| 182 | ; AX, CX, DX, SI, DI |
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| 183 | ;-------------------------------------------------------------------- |
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| 184 | .PrintBootMenuHotkey: |
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| 185 | %ifdef MODULE_BOOT_MENU |
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[492] | 186 | mov ax, BOOT_MENU_HOTKEY_SCANCODE | ('2' << 8) |
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| 187 | mov di, g_szBootMenu |
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[392] | 188 | call FormatFunctionHotkeyString |
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| 189 | %endif |
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[492] | 190 | ; Fall to .PrintComDetectHotkey |
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[392] | 191 | |
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| 192 | ;-------------------------------------------------------------------- |
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[492] | 193 | ; .PrintComDetectHotkey |
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| 194 | ; Parameters: |
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| 195 | ; ES: BDA segment (zero) |
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| 196 | ; Returns: |
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| 197 | ; Nothing |
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| 198 | ; Corrupts registers: |
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| 199 | ; AX, CX, DX, SI, DI |
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| 200 | ;-------------------------------------------------------------------- |
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| 201 | .PrintComDetectHotkey: |
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| 202 | %ifdef MODULE_SERIAL |
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| 203 | mov ax, COM_DETECT_HOTKEY_SCANCODE | ('6' << 8) |
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| 204 | mov di, g_szHotComDetect |
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| 205 | call FormatFunctionHotkeyString |
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| 206 | %endif |
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[505] | 207 | ; Fall to .PrintRomBootHotkey |
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[492] | 208 | |
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| 209 | ;-------------------------------------------------------------------- |
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[392] | 210 | ; .PrintRomBootHotkey |
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| 211 | ; Parameters: |
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| 212 | ; ES: BDA segment (zero) |
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| 213 | ; Returns: |
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| 214 | ; Nothing |
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| 215 | ; Corrupts registers: |
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| 216 | ; AX, CX, DX, SI, DI |
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| 217 | ;-------------------------------------------------------------------- |
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| 218 | .PrintRomBootHotkey: |
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[492] | 219 | mov ax, ROM_BOOT_HOTKEY_SCANCODE | ('8' << 8) |
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| 220 | mov di, g_szRomBoot |
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[392] | 221 | call FormatFunctionHotkeyString |
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| 222 | ; Fall to .EndHotkeyBarRendering |
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| 223 | |
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| 224 | ;-------------------------------------------------------------------- |
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| 225 | ; .EndHotkeyBarRendering |
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| 226 | ; Parameters: |
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| 227 | ; Stack: Screen coordinates before drawing Hotkey Bar |
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| 228 | ; Returns: |
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| 229 | ; Nothing |
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| 230 | ; Corrupts registers: |
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| 231 | ; AX, CX, DI |
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| 232 | ;-------------------------------------------------------------------- |
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| 233 | .EndHotkeyBarRendering: |
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[603] | 234 | ; Clear the rest of the top row |
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| 235 | CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH |
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| 236 | eMOVZX cx, al |
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| 237 | CALL_DISPLAY_LIBRARY GetSoftwareCoordinatesToAX |
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| 238 | sub cl, al |
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| 239 | mov al, ' ' |
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| 240 | CALL_DISPLAY_LIBRARY PrintRepeatedCharacterFromALwithCountInCX |
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| 241 | |
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| 242 | ; Restore the saved coordinates from stack |
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[392] | 243 | pop ax |
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[603] | 244 | ; Fall to HotkeyBar_SetCursorCoordinatesFromAX |
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[392] | 245 | |
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| 246 | |
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| 247 | ;-------------------------------------------------------------------- |
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[603] | 248 | ; HotkeyBar_SetCursorCoordinatesFromAX |
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[392] | 249 | ; Parameters: |
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| 250 | ; Nothing |
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| 251 | ; Returns: |
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| 252 | ; Nothing |
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| 253 | ; Corrupts registers: |
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[603] | 254 | ; AX, DI |
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[392] | 255 | ;-------------------------------------------------------------------- |
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[603] | 256 | HotkeyBar_SetCursorCoordinatesFromAX: |
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| 257 | JMP_DISPLAY_LIBRARY SetCursorCoordinatesFromAX |
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[392] | 258 | |
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| 259 | |
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| 260 | ;-------------------------------------------------------------------- |
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| 261 | ; FormatDriveHotkeyString |
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| 262 | ; Parameters: |
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[604] | 263 | ; CH: Zero if letter in CL is selected for boot |
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| 264 | ; CL: Drive letter hotkey from BOOTVARS |
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| 265 | ; AL: First character for drive key string |
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| 266 | ; AH: Second character for drive key string (ANGLE_QUOTE_RIGHT) |
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| 267 | ; SI: Offset to hotkey description string |
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| 268 | ; ES: BDA segment (zero) |
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[392] | 269 | ; Returns: |
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| 270 | ; Nothing |
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| 271 | ; Corrupts registers: |
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| 272 | ; AX, CX, DX, SI, DI |
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| 273 | ;-------------------------------------------------------------------- |
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[593] | 274 | FormatDriveHotkeyString: |
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| 275 | ; Invalid scancodes are filtered on HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX |
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| 276 | ; so here we have either drive letter or function key pressed. If latter, draw |
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| 277 | ; drive letters as unselected |
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| 278 | cmp BYTE [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bScancode], FIRST_FUNCTION_KEY_SCANCODE |
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| 279 | jae SHORT GetNonSelectedHotkeyDescriptionAttributeToDX |
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[392] | 280 | |
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[593] | 281 | ; Drive selected to boot from? |
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| 282 | test ch, ch |
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| 283 | jnz SHORT GetNonSelectedHotkeyDescriptionAttributeToDX |
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| 284 | jmp SHORT GetSelectedHotkeyDescriptionAttributeToDX |
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| 285 | |
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| 286 | |
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[392] | 287 | ;-------------------------------------------------------------------- |
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| 288 | ; FormatFunctionHotkeyString |
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| 289 | ; Parameters: |
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[604] | 290 | ; AL: Scancode of function key, to know which if any to show as selected |
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| 291 | ; Later replaced with an 'F' for the call to the output routine |
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| 292 | ; AH: Second character for drive key string |
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| 293 | ; SI: Offset to hotkey description string |
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| 294 | ; ES: BDA segment (zero) |
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[392] | 295 | ; Returns: |
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| 296 | ; Nothing |
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| 297 | ; Corrupts registers: |
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| 298 | ; AX, CX, DX, SI, DI |
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| 299 | ;-------------------------------------------------------------------- |
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| 300 | FormatFunctionHotkeyString: |
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[492] | 301 | xor cx, cx ; Null character, eaten in output routines |
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[392] | 302 | |
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[492] | 303 | cmp [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bScancode], al |
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| 304 | mov al, 'F' ; Replace scancode with character for output |
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[392] | 305 | |
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| 306 | %ifdef MODULE_BOOT_MENU |
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[492] | 307 | |
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[593] | 308 | GetSelectedHotkeyDescriptionAttributeToDX: |
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[596] | 309 | mov si, ATTRIBUTE_CHARS.cHighlightedItem ; Selected hotkey |
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[593] | 310 | je SHORT GetDescriptionAttributeToDX ; From compare with bScancode above and from FormatDriveHotkeyString |
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[392] | 311 | |
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| 312 | GetNonSelectedHotkeyDescriptionAttributeToDX: |
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[596] | 313 | mov si, ATTRIBUTE_CHARS.cItem ; Unselected hotkey |
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[392] | 314 | |
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| 315 | ; Display Library should not be called like this |
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| 316 | GetDescriptionAttributeToDX: |
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[492] | 317 | xchg dx, ax |
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[392] | 318 | call MenuAttribute_GetToAXfromTypeInSI |
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| 319 | xchg dx, ax ; DX = Description attribute |
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[505] | 320 | ;; fall through to PushHotkeyParamsAndFormat |
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[392] | 321 | |
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| 322 | |
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[500] | 323 | %else ; if no MODULE_BOOT_MENU - No boot menu so use simpler attributes |
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| 324 | |
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[593] | 325 | GetSelectedHotkeyDescriptionAttributeToDX: |
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[410] | 326 | mov dx, (COLOR_ATTRIBUTE(COLOR_YELLOW, COLOR_CYAN) << 8) | MONO_REVERSE_BLINK |
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[593] | 327 | je SHORT SelectAttributeFromDHorDLbasedOnVideoMode ; From compare with bScancode above and from FormatDriveHotkeyString |
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[392] | 328 | |
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| 329 | GetNonSelectedHotkeyDescriptionAttributeToDX: |
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[410] | 330 | mov dx, (COLOR_ATTRIBUTE(COLOR_BLACK, COLOR_CYAN) << 8) | MONO_REVERSE |
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[492] | 331 | |
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[410] | 332 | SelectAttributeFromDHorDLbasedOnVideoMode: |
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[500] | 333 | mov ch, [es:BDA.bVidMode] ; We only need to preserve CL |
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| 334 | shr ch, 1 |
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[410] | 335 | jnc SHORT .AttributeLoadedToDL ; Black & White modes |
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[500] | 336 | shr ch, 1 |
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[410] | 337 | jnz SHORT .AttributeLoadedToDL ; MDA |
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| 338 | mov dl, dh |
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| 339 | .AttributeLoadedToDL: |
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[505] | 340 | ;; fall through to PushHotkeyParamsAndFormat |
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[410] | 341 | |
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[492] | 342 | %endif ; MODULE_BOOT_MENU |
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[392] | 343 | |
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| 344 | |
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| 345 | ;-------------------------------------------------------------------- |
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| 346 | ; PushHotkeyParamsAndFormat |
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| 347 | ; Parameters: |
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[604] | 348 | ; AL: First character |
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| 349 | ; AH: Second character |
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| 350 | ; DX: Description Attribute |
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| 351 | ; CX: Description string parameter |
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| 352 | ; CS:DI: Description string |
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[392] | 353 | ; Returns: |
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| 354 | ; Nothing |
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| 355 | ; Corrupts registers: |
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| 356 | ; AX, SI, DI |
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| 357 | ;-------------------------------------------------------------------- |
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| 358 | PushHotkeyParamsAndFormat: |
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| 359 | push bp |
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| 360 | mov bp, sp |
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| 361 | |
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[492] | 362 | mov si, MONO_BRIGHT |
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[392] | 363 | |
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[492] | 364 | push si ; Key attribute |
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| 365 | push ax ; First Character |
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| 366 | mov al, ah |
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| 367 | push ax ; Second Character |
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| 368 | |
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[392] | 369 | push dx ; Description attribute |
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[492] | 370 | push di ; Description string |
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[392] | 371 | push cx ; Description string parameter |
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[505] | 372 | |
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[492] | 373 | push si ; Key attribute for last space |
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[392] | 374 | |
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| 375 | mov si, g_szHotkey |
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| 376 | jmp DetectPrint_FormatCSSIfromParamsInSSBP |
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| 377 | |
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| 378 | |
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| 379 | ;-------------------------------------------------------------------- |
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[599] | 380 | ; HotkeyBar_StoreDefaultDriveLettersToHotkeyVars |
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| 381 | ; Parameters: |
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| 382 | ; ES: BDA Segment |
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| 383 | ; Returns: |
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| 384 | ; Nothing |
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| 385 | ; Corrupts registers: |
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| 386 | ; AX |
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| 387 | ;-------------------------------------------------------------------- |
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| 388 | HotkeyBar_StoreDefaultDriveLettersToHotkeyVars: |
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| 389 | call BootVars_GetLetterForFirstHardDriveToAX |
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| 390 | mov ah, DEFAULT_FLOPPY_DRIVE_LETTER |
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| 391 | xchg al, ah |
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| 392 | mov [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wFddAndHddLetters], ax |
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| 393 | ret |
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| 394 | |
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| 395 | |
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| 396 | ;-------------------------------------------------------------------- |
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| 397 | ; HotkeyBar_InitializeVariables |
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| 398 | ; Parameters: |
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| 399 | ; DS: RAMVARS Segment |
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| 400 | ; ES: BDA Segment |
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| 401 | ; Returns: |
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| 402 | ; Nothing |
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| 403 | ; Corrupts registers: |
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| 404 | ; AX, CX, DX, DI |
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| 405 | ;-------------------------------------------------------------------- |
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| 406 | HotkeyBar_InitializeVariables: |
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| 407 | push ds |
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| 408 | push es |
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| 409 | pop ds |
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| 410 | |
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[604] | 411 | ; Store System Timer Tick handler and install our hotkeybar handler |
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| 412 | mov ax, [BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h*4] |
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[599] | 413 | mov [BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler], ax |
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[604] | 414 | mov ax, [BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h*4+2] |
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[599] | 415 | mov [BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler+2], ax |
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[604] | 416 | mov al, BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h |
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[599] | 417 | mov si, HotkeyBar_TimerTickHandler |
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| 418 | call Interrupts_InstallHandlerToVectorInALFromCSSI |
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| 419 | |
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| 420 | ; Store time when hotkeybar is displayed |
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| 421 | ; (it will be displayed after initialization is complete) |
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[604] | 422 | mov ax, [BDA.dwTimerTicks] |
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[599] | 423 | mov [BOOTVARS.hotkeyVars+HOTKEYVARS.wTimeWhenDisplayed], ax |
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| 424 | |
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| 425 | pop ds |
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| 426 | |
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| 427 | ; Initialize HOTKEYVARS by storing default drives to boot from |
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| 428 | call HotkeyBar_StoreDefaultDriveLettersToHotkeyVars |
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| 429 | mov dl, [cs:ROMVARS.bBootDrv] |
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| 430 | ; Fall to HotkeyBar_StoreHotkeyToBootvarsForDriveNumberInDL |
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| 431 | |
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| 432 | |
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| 433 | ;-------------------------------------------------------------------- |
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[528] | 434 | ; HotkeyBar_StoreHotkeyToBootvarsForDriveNumberInDL |
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[395] | 435 | ; Parameters: |
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| 436 | ; DS: RAMVARS segment |
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| 437 | ; ES: BDA segment (zero) |
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[528] | 438 | ; DL: Drive Number |
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| 439 | ; Returns: |
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| 440 | ; Nothing |
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| 441 | ; Corrupts registers: |
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| 442 | ; AX, CX, DL, DI |
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| 443 | ;-------------------------------------------------------------------- |
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| 444 | HotkeyBar_StoreHotkeyToBootvarsForDriveNumberInDL: |
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| 445 | call DriveXlate_ConvertDriveNumberFromDLtoDriveLetter |
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| 446 | ; Fall to StoreHotkeyToBootvarsForDriveLetterInDL |
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| 447 | |
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| 448 | |
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| 449 | ;-------------------------------------------------------------------- |
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| 450 | ; StoreHotkeyToBootvarsForDriveLetterInDL |
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| 451 | ; Parameters: |
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| 452 | ; DS: RAMVARS segment |
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| 453 | ; ES: BDA segment (zero) |
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[395] | 454 | ; DL: Drive Letter ('A'...) |
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| 455 | ; Returns: |
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| 456 | ; Nothing |
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| 457 | ; Corrupts registers: |
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| 458 | ; AX, CX, DI |
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| 459 | ;-------------------------------------------------------------------- |
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[528] | 460 | StoreHotkeyToBootvarsForDriveLetterInDL: |
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[395] | 461 | eMOVZX ax, dl |
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[505] | 462 | or al, 32 ; Upper case drive letter to lower case keystroke |
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[395] | 463 | jmp SHORT HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX |
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| 464 | |
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| 465 | |
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| 466 | ;-------------------------------------------------------------------- |
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[528] | 467 | ; ScanHotkeysFromKeyBufferAndStoreToBootvars |
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[392] | 468 | ; Parameters: |
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| 469 | ; DS: RAMVARS segment |
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| 470 | ; ES: BDA segment (zero) |
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| 471 | ; Returns: |
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[492] | 472 | ; AL: Last scancode value |
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[392] | 473 | ; Corrupts registers: |
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[492] | 474 | ; AH, CX |
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[392] | 475 | ;-------------------------------------------------------------------- |
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[528] | 476 | ScanHotkeysFromKeyBufferAndStoreToBootvars: |
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[392] | 477 | call Keyboard_GetKeystrokeToAX |
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| 478 | jz SHORT NoHotkeyToProcess |
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| 479 | |
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[528] | 480 | ; Prepare to read another key from buffer |
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| 481 | ePUSH_T cx, ScanHotkeysFromKeyBufferAndStoreToBootvars |
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[392] | 482 | ; Fall to HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX |
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| 483 | |
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| 484 | |
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| 485 | ;-------------------------------------------------------------------- |
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| 486 | ; HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX |
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| 487 | ; Parameters: |
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| 488 | ; AL: Hotkey ASCII code |
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| 489 | ; AH: Hotkey Scancode |
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| 490 | ; DS: RAMVARS segment |
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| 491 | ; ES: BDA segment (zero) |
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| 492 | ; Returns: |
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[567] | 493 | ; AL: Last scancode seen |
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[528] | 494 | ; CF: Set if valid hotkey in AL |
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| 495 | ; Clear if scancode in AL is not for any hotkey |
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[392] | 496 | ; Corrupts registers: |
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[492] | 497 | ; AH, CX, DI |
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[392] | 498 | ;-------------------------------------------------------------------- |
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| 499 | HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX: |
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[492] | 500 | mov di, BOOTVARS.hotkeyVars+HOTKEYVARS.bScancode |
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[392] | 501 | |
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[492] | 502 | ; All scancodes are saved, even if it wasn't a drive letter, |
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| 503 | ; which also covers our function key case. Invalid function keys |
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[505] | 504 | ; will not do anything (won't be printed, won't be accepted as input) |
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[492] | 505 | mov [es:di], ah |
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[505] | 506 | |
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[392] | 507 | ; Drive letter hotkeys remaining, allow 'a' to 'z' |
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| 508 | call Char_IsLowerCaseLetterInAL |
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[492] | 509 | jnc SHORT .KeystrokeIsNotValidDriveLetter |
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[505] | 510 | and al, ~32 ; We want to print upper case letters |
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[392] | 511 | |
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| 512 | ; Clear HD First flag to assume Floppy Drive hotkey |
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[492] | 513 | dec di |
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[392] | 514 | and BYTE [es:di], ~FLG_HOTKEY_HD_FIRST |
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| 515 | |
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| 516 | ; Determine if Floppy or Hard Drive hotkey |
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[505] | 517 | xchg cx, ax |
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[547] | 518 | call BootVars_GetLetterForFirstHardDriveToAX |
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[392] | 519 | cmp cl, al |
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| 520 | jb SHORT .StoreDriveLetter ; Store Floppy Drive letter |
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| 521 | |
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| 522 | ; Store Hard Drive letter |
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| 523 | or BYTE [es:di], FLG_HOTKEY_HD_FIRST |
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| 524 | |
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| 525 | .StoreDriveLetter: |
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[505] | 526 | sbb di, BYTE 1 ; Sub CF if Floppy Drive |
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[392] | 527 | xchg ax, cx |
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[592] | 528 | stosb |
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[528] | 529 | stc ; Valid hotkey scancode returned in AL |
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[392] | 530 | |
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[505] | 531 | .KeystrokeIsNotValidDriveLetter: |
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[392] | 532 | NoHotkeyToProcess: |
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[492] | 533 | mov al, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bScancode] |
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[392] | 534 | ret |
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| 535 | |
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[528] | 536 | |
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[392] | 537 | ;-------------------------------------------------------------------- |
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[492] | 538 | ; HotkeyBar_GetBootDriveNumbersToDX |
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[392] | 539 | ; Parameters: |
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| 540 | ; DS: RAMVARS segment |
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| 541 | ; ES: BDA segment (zero) |
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| 542 | ; Returns: |
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[492] | 543 | ; DX: Drives selected as boot device, DL is primary |
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[392] | 544 | ; Corrupts registers: |
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[492] | 545 | ; AX |
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[392] | 546 | ;-------------------------------------------------------------------- |
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[492] | 547 | HotkeyBar_GetBootDriveNumbersToDX: |
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[500] | 548 | mov dx, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wFddAndHddLetters] |
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[600] | 549 | |
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| 550 | ; HotkeyBar_GetBootDriveNumbersToDX is called when all drives are detected and |
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| 551 | ; drive letters are known. |
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| 552 | ; Replace unavailable hard drive letter with first hard drive. |
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| 553 | ; If we have boot menu, it will be displayed instead. |
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| 554 | %ifndef MODULE_BOOT_MENU |
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| 555 | call BootVars_GetLetterForFirstHardDriveToAX |
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| 556 | mov ah, al |
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| 557 | add al, [es:BDA.bHDCount] ; AL now contains first unavailable HD letter |
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| 558 | cmp dh, al ; Unavailable drive? |
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| 559 | jb SHORT .ValidHardDriveLetterInDH |
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| 560 | mov dh, ah ; Replace unavailable drive with first drive |
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| 561 | .ValidHardDriveLetterInDH: |
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| 562 | %endif |
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| 563 | |
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[505] | 564 | test BYTE [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bFlags], FLG_HOTKEY_HD_FIRST |
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[600] | 565 | jnz SHORT .noflip |
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[392] | 566 | xchg dl, dh |
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[505] | 567 | .noflip: |
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[492] | 568 | call DriveXlate_ConvertDriveLetterInDLtoDriveNumber |
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| 569 | xchg dl, dh |
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[505] | 570 | ; Fall to HotkeyBar_FallThroughTo_DriveXlate_ConvertDriveLetterInDLtoDriveNumber |
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[392] | 571 | |
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[505] | 572 | HotkeyBar_FallThroughTo_DriveXlate_ConvertDriveLetterInDLtoDriveNumber: |
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| 573 | |
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