1 | ; Project name : XTIDE Universal BIOS |
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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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7 | ; ROM Variables. Written to the ROM image before flashing. |
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8 | struc ROMVARS |
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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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12 | |
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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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16 | |
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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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19 | .wBootTimeout resb 2 ; Boot Menu selection timeout in system timer ticks |
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20 | .bIdeCnt resb 1 ; Number of available IDE controllers |
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21 | .bBootDrv resb 1 ; Boot Menu default drive |
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22 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives |
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23 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM |
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24 | |
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25 | .ideVars0 resb IDEVARS_size |
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26 | .ideVars1 resb IDEVARS_size |
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27 | .ideVars2 resb IDEVARS_size |
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28 | .ideVars3 resb IDEVARS_size |
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29 | |
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30 | %ifdef MODULE_SERIAL |
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31 | .ideVarsSerialAuto resb IDEVARS_size |
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32 | %endif |
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33 | endstruc |
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34 | |
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35 | ; Bit defines for ROMVARS.wFlags |
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36 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.) |
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37 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation |
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38 | FLG_ROMVARS_SERIAL_SCANDETECT EQU (1<<3) ; Scan COM ports at the end of drive detection. Can also be invoked |
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39 | ; by holding down the ALT key at the end of drive detection. |
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40 | ; (Conveniently, this is 8, a fact we exploit when testing the bit) |
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41 | FLG_ROMVARS_MODULE_SERIAL EQU (1<<6) ; Here in case the configuration needs to know functionality is present |
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42 | FLG_ROMVARS_MODULE_EBIOS EQU (1<<7) ; Here in case the configuration needs to know functionality is present |
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43 | |
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44 | ; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes) |
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45 | DEFAULT_TEXT_MODE EQU 4 |
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46 | |
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47 | |
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48 | ; Controller specific variables |
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49 | struc IDEVARS |
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50 | .wPort: ; IDE Base Port for Command Block (usual) Registers |
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51 | .bSerialCOMDigit resb 1 ; Serial Device COM Port digit |
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52 | .bSerialPackedPortAndBaud resb 1 ; Serial Device packed port and baud |
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53 | |
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54 | .wPortCtrl: ; IDE Base Port for Control Block Registers |
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55 | .wSerialPackedPrintBaud resb 2 ; Serial Device packed baud rate for printing |
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56 | |
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57 | .bDevice resb 1 ; Device type |
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58 | .bIRQ resb 1 ; Interrupt Request Number |
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59 | .drvParamsMaster resb DRVPARAMS_size |
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60 | .drvParamsSlave resb DRVPARAMS_size |
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61 | endstruc |
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62 | |
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63 | ; Default values for Port and PortCtrl, shared with the configurator |
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64 | ; |
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65 | DEVICE_XTIDE_DEFAULT_PORT EQU 300h |
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66 | DEVICE_XTIDE_DEFAULT_PORTCTRL EQU 308h |
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67 | DEVICE_ATA_DEFAULT_PORT EQU 1F0h |
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68 | DEVICE_ATA_DEFAULT_PORTCTRL EQU 3F0h |
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69 | DEVICE_SERIAL_DEFAULT_COM EQU 0 ; COM1 |
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70 | DEVICE_SERIAL_DEFAULT_BAUD EQU 1 ; 9600 |
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71 | |
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72 | ; Device types for IDEVARS.bDevice |
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73 | ; |
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74 | DEVICE_8BIT_DUAL_PORT_XTIDE EQU (0<<1) |
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75 | DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0 EQU (1<<1) |
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76 | DEVICE_8BIT_SINGLE_PORT EQU (2<<1) |
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77 | DEVICE_16BIT_ATA EQU (3<<1) |
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78 | DEVICE_32BIT_ATA EQU (4<<1) |
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79 | DEVICE_SERIAL_PORT EQU (5<<1) |
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80 | |
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81 | |
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82 | ; Master/Slave drive specific parameters |
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83 | struc DRVPARAMS |
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84 | .wFlags resb 2 ; Drive flags |
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85 | .wCylinders resb 2 ; User specified cylinders (1...16383) |
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86 | .wHeadsAndSectors: |
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87 | .bHeads resb 1 ; User specified Heads (1...16) |
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88 | .bSect resb 1 ; User specified Sectors per track (1...63) |
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89 | endstruc |
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90 | |
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91 | ; Bit defines for DRVPARAMS.wFlags |
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92 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values |
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93 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers |
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94 | |
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95 | |
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96 | ; Defines for IDEVARS.bSerialPackedPortAndBaud (same format used by DPT.bSerialPortAndBaud) |
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97 | ; |
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98 | ; pppp ppbb |
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99 | ; i/o port address = p * 2 + 240h |
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100 | ; baud rate = b, where 00 = 2400, 01 = 9600, 10 = 38.4K, 11 = 115.2K |
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101 | ; |
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102 | ; 240h/2400baud corresponds to 0 for a PackedPortAndBaud value, which triggers auto detect code. |
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103 | ; Which means 240h is not usable, and is why ..._MINPORT is 248h. A value is reserved at the upper |
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104 | ; end of the spectrum in case it is needed (whcih is why it is 430h instead of 438h). |
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105 | ; |
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106 | DEVICE_SERIAL_PACKEDPORTANDBAUD_PORTMASK EQU 0fch |
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107 | DEVICE_SERIAL_PACKEDPORTANDBAUD_PORTBITS EQU 03fh |
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108 | DEVICE_SERIAL_PACKEDPORTANDBAUD_PORT_FIELD_POSITION EQU 2 |
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109 | DEVICE_SERIAL_PACKEDPORTANDBAUD_STARTINGPORT EQU 240h |
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110 | DEVICE_SERIAL_PACKEDPORTANDBAUD_MINPORT EQU 248h ; minimum port value that the user can set |
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111 | DEVICE_SERIAL_PACKEDPORTANDBAUD_MAXPORT EQU 430h ; or ((..._PORTMASK-1) << 1) + ..._STARTINGPORT |
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112 | |
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113 | DEVICE_SERIAL_PACKEDPORTANDBAUD_BAUDMASK EQU 3h |
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114 | DEVICE_SERIAL_PACKEDPORTANDBAUD_BAUDBITS EQU 3h |
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115 | DEVICE_SERIAL_PACKEDPORTANDBAUD_BAUD_FIELD_POSITION EQU 0 |
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116 | |
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117 | ; Defines for IDEVARS.wSerialPrintBaud |
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118 | ; |
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119 | ; pppp ppnn nnnn nnnn |
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120 | ; unsigned number to output = n |
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121 | ; postfix character = p + '0' (designed for '0' and 'K', although other values are possible) |
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122 | ; |
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123 | ; Note that the contents of this word is only used for printing by the BIOS when a drive is detected. |
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124 | ; It is not used for any other purpose, and so long as it conforms to the structure, any values can be used. |
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125 | ; |
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126 | DEVICE_SERIAL_PRINTBAUD_NUMBERMASK EQU 003ffh |
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127 | DEVICE_SERIAL_PRINTBAUD_POSTCHARMASK EQU 0fc00h |
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128 | DEVICE_SERIAL_PRINTBAUD_POSTCHARADD EQU '0' |
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129 | ; |
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130 | ; These are defined here (instead of in the configurator) for consistency since they could also be used |
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131 | ; in main.asm as a default for an IDEVARS structure. |
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132 | ; |
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133 | DEVICE_SERIAL_PRINTBAUD_2400 EQU ((('0'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 240) ; Prints "2400" |
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134 | DEVICE_SERIAL_PRINTBAUD_9600 EQU ((('0'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 960) ; Prints "9600" |
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135 | DEVICE_SERIAL_PRINTBAUD_38_4 EQU ((('K'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 38) ; Prints "38K" |
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136 | DEVICE_SERIAL_PRINTBAUD_115_2 EQU ((('K'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 115) ; Prints "115K" |
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137 | |
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138 | ; |
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139 | ; COM Number to I/O Port Address Mapping |
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140 | ; |
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141 | ; COM Number: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 |
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142 | ; Corresponds to I/O port: 3f8, 2f8, 3e8, 2e8, 2f0, 3e0, 2e0, 260, 368, 268, 360, 270 |
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143 | ; Corresponds to Packed I/O port (hex): 37, 17, 35, 15, 16, 34, 14, 4, 25, 5, 24, 6 |
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144 | ; |
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145 | DEVICE_SERIAL_COM1 EQU 3f8h |
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146 | DEVICE_SERIAL_COM2 EQU 2f8h |
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147 | DEVICE_SERIAL_COM3 EQU 3e8h |
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148 | DEVICE_SERIAL_COM4 EQU 2e8h |
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149 | DEVICE_SERIAL_COM5 EQU 2f0h |
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150 | DEVICE_SERIAL_COM6 EQU 3e0h |
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151 | DEVICE_SERIAL_COM7 EQU 2e0h |
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152 | DEVICE_SERIAL_COM8 EQU 260h |
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153 | DEVICE_SERIAL_COM9 EQU 368h |
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154 | DEVICE_SERIAL_COMA EQU 268h |
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155 | DEVICE_SERIAL_COMB EQU 360h |
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156 | DEVICE_SERIAL_COMC EQU 270h |
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157 | |
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158 | |
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159 | %endif ; ROMVARS_INC |
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