| 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 | ;;; Word 0
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| 51 | .wSerialPortAndBaud: ; Serial connection port (low, divided by 4) and baud rate divisor (high)
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| 52 | .wPort: ; IDE Base Port for Command Block (usual) Registers
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| 53 | .bSerialPort resb 1
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| 54 | .bSerialBaud resb 1
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| 55 |
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| 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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| 59 |
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| 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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| 64 | .bDevice resb 1 ; Device type
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| 65 |
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| 66 | .bIRQ resb 1 ; Interrupt Request Number
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| 67 |
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| 68 | ;;; And more...
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| 69 | .drvParamsMaster resb DRVPARAMS_size
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| 70 | .drvParamsSlave resb DRVPARAMS_size
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| 71 | endstruc
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| 72 |
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| 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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| 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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| 84 | ; Device types for IDEVARS.bDevice
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| 85 | ;
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| 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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| 91 | DEVICE_SERIAL_PORT EQU (5<<1) ; must be last entry, or remove optimization in DetectPrint
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| 92 |
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| 93 |
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| 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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| 97 | .dwMaximumLBA: ; User specified maximum number of sectors
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| 98 | .wCylinders resb 2 ; User specified cylinders (1...16383)
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| 99 | .wHeadsAndSectors:
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| 100 | .bHeads resb 1 ; User specified Heads (1...16)
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| 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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| 107 | FLG_DRVPARAMS_USERLBA EQU (1<<2) ; User specified LBA values
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| 108 |
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| 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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| 130 | %endif ; ROMVARS_INC
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