[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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| 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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[90] | 24 | |
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[181] | 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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[175] | 29 | |
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[176] | 30 | %ifdef MODULE_SERIAL |
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[175] | 31 | .ideVarsSerialAuto resb IDEVARS_size |
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[176] | 32 | %endif |
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[3] | 33 | endstruc |
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| 34 | |
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| 35 | ; Bit defines for ROMVARS.wFlags |
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[199] | 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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[176] | 43 | |
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[143] | 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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[3] | 46 | |
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[143] | 47 | |
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[3] | 48 | ; Controller specific variables |
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| 49 | struc IDEVARS |
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[233] | 50 | ;;; Word 0 |
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| 51 | .wSerialPortAndBaud: ; Serial connection port (low, divided by 4) and baud rate divisor (high) |
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[196] | 52 | .wPort: ; IDE Base Port for Command Block (usual) Registers |
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[233] | 53 | .bSerialPort resb 1 |
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| 54 | .bSerialBaud resb 1 |
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[196] | 55 | |
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[233] | 56 | ;;; Word 1 |
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| 57 | .wPortCtrl: |
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| 58 | .bSerialUnused resb 1 ; IDE Base Port for Control Block Registers |
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[196] | 59 | |
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[233] | 60 | .wSerialCOMPortCharAndDevice: ; In DetectPrint, we grab the COM Port char and Device at the same time |
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| 61 | .bSerialCOMPortChar resb 1 ; Serial connection COM port number/letter |
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| 62 | |
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| 63 | ;;; Word 2 |
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[196] | 64 | .bDevice resb 1 ; Device type |
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[233] | 65 | |
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[196] | 66 | .bIRQ resb 1 ; Interrupt Request Number |
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[233] | 67 | |
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| 68 | ;;; And more... |
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[196] | 69 | .drvParamsMaster resb DRVPARAMS_size |
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| 70 | .drvParamsSlave resb DRVPARAMS_size |
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[3] | 71 | endstruc |
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| 72 | |
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[233] | 73 | %if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice |
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| 74 | %erorr "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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| 75 | %endif |
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| 76 | |
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[199] | 77 | ; Default values for Port and PortCtrl, shared with the configurator |
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| 78 | ; |
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| 79 | DEVICE_XTIDE_DEFAULT_PORT EQU 300h |
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| 80 | DEVICE_XTIDE_DEFAULT_PORTCTRL EQU 308h |
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| 81 | DEVICE_ATA_DEFAULT_PORT EQU 1F0h |
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| 82 | DEVICE_ATA_DEFAULT_PORTCTRL EQU 3F0h |
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| 83 | |
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[175] | 84 | ; Device types for IDEVARS.bDevice |
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[199] | 85 | ; |
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[150] | 86 | DEVICE_8BIT_DUAL_PORT_XTIDE EQU (0<<1) |
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| 87 | DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0 EQU (1<<1) |
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| 88 | DEVICE_8BIT_SINGLE_PORT EQU (2<<1) |
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| 89 | DEVICE_16BIT_ATA EQU (3<<1) |
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| 90 | DEVICE_32BIT_ATA EQU (4<<1) |
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[233] | 91 | DEVICE_SERIAL_PORT EQU (5<<1) ; must be last entry, or remove optimization in DetectPrint |
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[3] | 92 | |
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[199] | 93 | |
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[3] | 94 | ; Master/Slave drive specific parameters |
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| 95 | struc DRVPARAMS |
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| 96 | .wFlags resb 2 ; Drive flags |
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[227] | 97 | .dwMaximumLBA: ; User specified maximum number of sectors |
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[3] | 98 | .wCylinders resb 2 ; User specified cylinders (1...16383) |
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[99] | 99 | .wHeadsAndSectors: |
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| 100 | .bHeads resb 1 ; User specified Heads (1...16) |
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[3] | 101 | .bSect resb 1 ; User specified Sectors per track (1...63) |
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| 102 | endstruc |
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| 103 | |
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| 104 | ; Bit defines for DRVPARAMS.wFlags |
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| 105 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values |
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| 106 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers |
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[227] | 107 | FLG_DRVPARAMS_USERLBA EQU (1<<2) ; User specified LBA values |
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[3] | 108 | |
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[199] | 109 | ; |
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| 110 | ; COM Number to I/O Port Address Mapping |
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| 111 | ; |
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| 112 | ; COM Number: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 |
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| 113 | ; Corresponds to I/O port: 3f8, 2f8, 3e8, 2e8, 2f0, 3e0, 2e0, 260, 368, 268, 360, 270 |
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| 114 | ; Corresponds to Packed I/O port (hex): 37, 17, 35, 15, 16, 34, 14, 4, 25, 5, 24, 6 |
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| 115 | ; |
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| 116 | DEVICE_SERIAL_COM1 EQU 3f8h |
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| 117 | DEVICE_SERIAL_COM2 EQU 2f8h |
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| 118 | DEVICE_SERIAL_COM3 EQU 3e8h |
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| 119 | DEVICE_SERIAL_COM4 EQU 2e8h |
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| 120 | DEVICE_SERIAL_COM5 EQU 2f0h |
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| 121 | DEVICE_SERIAL_COM6 EQU 3e0h |
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| 122 | DEVICE_SERIAL_COM7 EQU 2e0h |
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| 123 | DEVICE_SERIAL_COM8 EQU 260h |
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| 124 | DEVICE_SERIAL_COM9 EQU 368h |
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| 125 | DEVICE_SERIAL_COMA EQU 268h |
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| 126 | DEVICE_SERIAL_COMB EQU 360h |
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| 127 | DEVICE_SERIAL_COMC EQU 270h |
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| 128 | |
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| 129 | |
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[3] | 130 | %endif ; ROMVARS_INC |
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