[90] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Defines for ROMVARS struct containing variables stored |
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| 3 | ; in BIOS ROM. |
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| 4 | %ifndef ROMVARS_INC |
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| 5 | %define ROMVARS_INC |
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| 6 | |
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[181] | 7 | ; ROM Variables. Written to the ROM image before flashing. |
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[3] | 8 | struc ROMVARS |
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[181] | 9 | .wRomSign resb 2 ; ROM Signature (AA55h) |
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| 10 | .bRomSize resb 1 ; ROM size in 512 byte blocks |
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| 11 | .rgbJump resb 3 ; First instruction to ROM init (jmp) |
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[90] | 12 | |
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[181] | 13 | .rgbSign resb 8 ; Signature for XTIDE Configurator Program |
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| 14 | .szTitle resb 31 ; BIOS title string |
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| 15 | .szVersion resb 25 ; BIOS version string |
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[90] | 16 | |
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[181] | 17 | .wFlags resb 2 ; Word for ROM flags |
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| 18 | .wDisplayMode resb 2 ; Display mode for boot menu |
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[243] | 19 | .wfDisplayBootMenu: ; Zero = no Boot Menu, non-zero = Boot Menu timeout |
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[181] | 20 | .wBootTimeout resb 2 ; Boot Menu selection timeout in system timer ticks |
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| 21 | .bIdeCnt resb 1 ; Number of available IDE controllers |
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| 22 | .bBootDrv resb 1 ; Boot Menu default drive |
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| 23 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives |
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| 24 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM |
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[90] | 25 | |
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[316] | 26 | .ideVarsBegin: |
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[181] | 27 | .ideVars0 resb IDEVARS_size |
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| 28 | .ideVars1 resb IDEVARS_size |
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| 29 | .ideVars2 resb IDEVARS_size |
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| 30 | .ideVars3 resb IDEVARS_size |
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[175] | 31 | |
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[176] | 32 | %ifdef MODULE_SERIAL |
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[175] | 33 | .ideVarsSerialAuto resb IDEVARS_size |
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[176] | 34 | %endif |
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[316] | 35 | |
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| 36 | .ideVarsEnd: |
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[3] | 37 | endstruc |
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| 38 | |
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[316] | 39 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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| 40 | %if ROMVARS.ideVarsEnd & 0xff00 <> 0 |
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| 41 | %error ".ideVars structures must fit within the first 256 bytes of the ROM image" |
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| 42 | %endif |
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| 43 | %if (ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin) = 0 |
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[322] | 44 | %error "there must be at least one .ideVars structure, it would be bizarre if this were not true, but it is assumed in the ah0h reset code." |
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[316] | 45 | %endif |
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| 46 | %endif |
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| 47 | |
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[3] | 48 | ; Bit defines for ROMVARS.wFlags |
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[199] | 49 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.) |
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| 50 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation |
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| 51 | FLG_ROMVARS_SERIAL_SCANDETECT EQU (1<<3) ; Scan COM ports at the end of drive detection. Can also be invoked |
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| 52 | ; by holding down the ALT key at the end of drive detection. |
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| 53 | ; (Conveniently, this is 8, a fact we exploit when testing the bit) |
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[243] | 54 | FLG_ROMVARS_MODULE_JRIDE EQU (1<<5) ; Here in case the configuration needs to know functionality is present |
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[199] | 55 | FLG_ROMVARS_MODULE_SERIAL EQU (1<<6) ; Here in case the configuration needs to know functionality is present |
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| 56 | FLG_ROMVARS_MODULE_EBIOS EQU (1<<7) ; Here in case the configuration needs to know functionality is present |
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[176] | 57 | |
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[143] | 58 | ; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes) |
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| 59 | DEFAULT_TEXT_MODE EQU 4 |
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[3] | 60 | |
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[143] | 61 | |
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[3] | 62 | ; Controller specific variables |
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| 63 | struc IDEVARS |
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[233] | 64 | ;;; Word 0 |
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| 65 | .wSerialPortAndBaud: ; Serial connection port (low, divided by 4) and baud rate divisor (high) |
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[196] | 66 | .wPort: ; IDE Base Port for Command Block (usual) Registers |
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[233] | 67 | .bSerialPort resb 1 |
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| 68 | .bSerialBaud resb 1 |
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[196] | 69 | |
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[233] | 70 | ;;; Word 1 |
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| 71 | .wPortCtrl: |
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| 72 | .bSerialUnused resb 1 ; IDE Base Port for Control Block Registers |
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[196] | 73 | |
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[233] | 74 | .wSerialCOMPortCharAndDevice: ; In DetectPrint, we grab the COM Port char and Device at the same time |
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| 75 | .bSerialCOMPortChar resb 1 ; Serial connection COM port number/letter |
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| 76 | |
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| 77 | ;;; Word 2 |
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[196] | 78 | .bDevice resb 1 ; Device type |
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[233] | 79 | |
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[196] | 80 | .bIRQ resb 1 ; Interrupt Request Number |
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[233] | 81 | |
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| 82 | ;;; And more... |
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[196] | 83 | .drvParamsMaster resb DRVPARAMS_size |
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| 84 | .drvParamsSlave resb DRVPARAMS_size |
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[3] | 85 | endstruc |
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| 86 | |
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[261] | 87 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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| 88 | %if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice |
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| 89 | %error "IDEVARS.bSerialCOMPortChar needs to come immediately before IDEVARS.bDevice so that both bytes can be fetched at the same time inside DetectPrint.asm" |
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| 90 | %endif |
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[233] | 91 | %endif |
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| 92 | |
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[199] | 93 | ; Default values for Port and PortCtrl, shared with the configurator |
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| 94 | ; |
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| 95 | DEVICE_XTIDE_DEFAULT_PORT EQU 300h |
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| 96 | DEVICE_XTIDE_DEFAULT_PORTCTRL EQU 308h |
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| 97 | DEVICE_ATA_DEFAULT_PORT EQU 1F0h |
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| 98 | DEVICE_ATA_DEFAULT_PORTCTRL EQU 3F0h |
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| 99 | |
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[175] | 100 | ; Device types for IDEVARS.bDevice |
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[199] | 101 | ; |
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[361] | 102 | DEVICE_XTIDE_REV1 EQU (0<<1) |
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| 103 | DEVICE_XTIDE_REV2 EQU (1<<1) ; Or rev 1 with swapped A0 and A3 (chuck mod) |
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| 104 | DEVICE_FAST_XTIDE EQU (2<<1) ; (CPLD v2 project) |
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[150] | 105 | DEVICE_16BIT_ATA EQU (3<<1) |
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| 106 | DEVICE_32BIT_ATA EQU (4<<1) |
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[244] | 107 | DEVICE_SERIAL_PORT EQU (5<<1) |
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[238] | 108 | DEVICE_JRIDE_ISA EQU (6<<1) |
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[3] | 109 | |
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[199] | 110 | |
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[3] | 111 | ; Master/Slave drive specific parameters |
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| 112 | struc DRVPARAMS |
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| 113 | .wFlags resb 2 ; Drive flags |
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[227] | 114 | .dwMaximumLBA: ; User specified maximum number of sectors |
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[3] | 115 | .wCylinders resb 2 ; User specified cylinders (1...16383) |
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[99] | 116 | .wHeadsAndSectors: |
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| 117 | .bHeads resb 1 ; User specified Heads (1...16) |
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[3] | 118 | .bSect resb 1 ; User specified Sectors per track (1...63) |
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| 119 | endstruc |
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| 120 | |
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| 121 | ; Bit defines for DRVPARAMS.wFlags |
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[276] | 122 | MASK_DRVPARAMS_WRITECACHE EQU (3<<0) ; Drive internal write cache settings (must start at bit 0) |
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| 123 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<2) ; Enable Block mode transfers |
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| 124 | FLG_DRVPARAMS_USERCHS EQU (1<<3) ; User specified P-CHS values |
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| 125 | FLG_DRVPARAMS_USERLBA EQU (1<<4) ; User specified LBA values |
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[3] | 126 | |
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[276] | 127 | ; Drive Write Cache values for DRVPARAMS.wFlags.MASK_DRVPARAMS_WRITECACHE |
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| 128 | DEFAULT_WRITE_CACHE EQU 0 ; Must be 0 |
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| 129 | DISABLE_WRITE_CACHE EQU 1 |
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| 130 | ENABLE_WRITE_CACHE EQU 2 |
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| 131 | |
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[3] | 132 | %endif ; ROMVARS_INC |
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