| 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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