| 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 |
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| 5 | ;
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| 6 | ; XTIDE Universal BIOS and Associated Tools
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| 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
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| 8 | ;
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| 9 | ; This program is free software; you can redistribute it and/or modify
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| 10 | ; it under the terms of the GNU General Public License as published by
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| 11 | ; the Free Software Foundation; either version 2 of the License, or
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| 12 | ; (at your option) any later version.
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| 13 | ;
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| 14 | ; This program is distributed in the hope that it will be useful,
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | ; GNU General Public License for more details.
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| 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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| 19 | ;
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| 20 |
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| 21 | %ifndef ROMVARS_INC
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| 22 | %define ROMVARS_INC
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| 23 |
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| 24 | ; ROM Variables. Written to the ROM image before flashing.
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| 25 | struc ROMVARS
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| 26 | .wRomSign resb 2 ; ROM Signature (AA55h)
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| 27 | .bRomSize resb 1 ; ROM size in 512 byte blocks
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| 28 | .rgbJump resb 3 ; First instruction to ROM init (jmp)
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| 29 |
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| 30 | .rgbSign resb 8 ; Signature for XTIDE Configurator Program
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| 31 | .szTitle resb 31 ; BIOS title string
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| 32 | .szVersion resb 25 ; BIOS version string
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| 33 |
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| 34 | .wFlags resb 2 ; Word for ROM flags
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| 35 | .wDisplayMode resb 2 ; Display mode for boot menu
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| 36 | .wfDisplayBootMenu: ; Zero = no Boot Menu, non-zero = Boot Menu timeout
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| 37 | .wBootTimeout resb 2 ; Boot Menu selection timeout in system timer ticks
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| 38 | .bIdeCnt resb 1 ; Number of available IDE controllers
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| 39 | .bBootDrv resb 1 ; Default drive to boot from
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| 40 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives
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| 41 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM
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| 42 | .bIdleTimeout resb 1 ; Standby timer value
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| 43 |
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| 44 | .ideVarsBegin:
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| 45 | .ideVars0 resb IDEVARS_size
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| 46 | .ideVars1 resb IDEVARS_size
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| 47 | .ideVars2 resb IDEVARS_size
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| 48 | .ideVars3 resb IDEVARS_size
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| 49 |
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| 50 | %ifdef MODULE_SERIAL
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| 51 | .ideVarsSerialAuto resb IDEVARS_size
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| 52 | %endif
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| 53 |
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| 54 | .ideVarsEnd:
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| 55 | endstruc
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| 56 |
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| 57 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
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| 58 | %if ROMVARS.ideVarsEnd & 0xff00 <> 0
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| 59 | %error ".ideVars structures must fit within the first 256 bytes of the ROM image"
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| 60 | %endif
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| 61 | %if (ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin) = 0
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| 62 | %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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| 63 | %endif
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| 64 | %endif
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| 65 |
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| 66 | ; Bit defines for ROMVARS.wFlags
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| 67 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.)
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| 68 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation
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| 69 | FLG_ROMVARS_SERIAL_SCANDETECT EQU (1<<3) ; Scan COM ports at the end of drive detection. Can also be invoked
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| 70 | ; by holding down the ALT key at the end of drive detection.
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| 71 | ; (Conveniently, this is 8, a fact we exploit when testing the bit)
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| 72 | FLG_ROMVARS_MODULE_ADVATA EQU (1<<4) ; Here in case the configuration needs to know functionality is present
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| 73 | FLG_ROMVARS_MODULE_JRIDE EQU (1<<5) ; Here in case the configuration needs to know functionality is present
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| 74 | FLG_ROMVARS_MODULE_SERIAL EQU (1<<6) ; Here in case the configuration needs to know functionality is present
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| 75 | FLG_ROMVARS_MODULE_EBIOS EQU (1<<7) ; Here in case the configuration needs to know functionality is present
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| 76 |
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| 77 | ; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes)
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| 78 | DEFAULT_TEXT_MODE EQU 4
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| 79 |
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| 80 |
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| 81 | ; Controller specific variables
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| 82 | struc IDEVARS
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| 83 | ;;; Word 0
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| 84 | .wSerialPortAndBaud: ; Serial connection port (low, divided by 4) and baud rate divisor (high)
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| 85 | .wPort: ; IDE Base Port for Command Block (usual) Registers
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| 86 | .bSerialPort resb 1
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| 87 | .bSerialBaud resb 1
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| 88 |
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| 89 | ;;; Word 1
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| 90 | .wPortCtrl:
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| 91 | .bSerialUnused resb 1 ; IDE Base Port for Control Block Registers
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| 92 |
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| 93 | .wSerialCOMPortCharAndDevice: ; In DetectPrint, we grab the COM Port char and Device at the same time
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| 94 | .bSerialCOMPortChar resb 1 ; Serial connection COM port number/letter
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| 95 |
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| 96 | ;;; Word 2
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| 97 | .bDevice resb 1 ; Device type
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| 98 |
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| 99 | .bIRQ resb 1 ; Interrupt Request Number
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| 100 |
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| 101 | ;;; And more...
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| 102 | .drvParamsMaster resb DRVPARAMS_size
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| 103 | .drvParamsSlave resb DRVPARAMS_size
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| 104 | endstruc
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| 105 |
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| 106 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
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| 107 | %if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice
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| 108 | %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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| 109 | %endif
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| 110 | %endif
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| 111 |
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| 112 | ; Default values for Port and PortCtrl, shared with the configurator
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| 113 | ;
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| 114 | DEVICE_XTIDE_DEFAULT_PORT EQU 300h
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| 115 | DEVICE_XTIDE_DEFAULT_PORTCTRL EQU 308h
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| 116 | DEVICE_ATA_DEFAULT_PORT EQU 1F0h
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| 117 | DEVICE_ATA_DEFAULT_PORTCTRL EQU 3F0h
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| 118 | DEVICE_ATA_DEFAULT_SECONDARY_PORT EQU 170h
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| 119 | DEVICE_ATA_DEFAULT_SECONDARY_PORTCTRL EQU 370h
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| 120 |
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| 121 | ; Device types for IDEVARS.bDevice
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| 122 | ;
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| 123 | DEVICE_XTIDE_REV1 EQU (0<<1)
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| 124 | DEVICE_XTIDE_REV2 EQU (1<<1) ; Or rev 1 with swapped A0 and A3 (chuck mod)
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| 125 | DEVICE_FAST_XTIDE EQU (2<<1) ; (CPLD v2 project)
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| 126 | DEVICE_16BIT_ATA EQU (3<<1)
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| 127 | DEVICE_32BIT_ATA EQU (4<<1)
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| 128 | DEVICE_SERIAL_PORT EQU (5<<1)
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| 129 | DEVICE_JRIDE_ISA EQU (6<<1)
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| 130 |
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| 131 |
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| 132 | ; Master/Slave drive specific parameters
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| 133 | struc DRVPARAMS
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| 134 | .wFlags resb 2 ; Drive flags
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| 135 | .dwMaximumLBA: ; User specified maximum number of sectors
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| 136 | .wCylinders resb 2 ; User specified cylinders (1...16383)
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| 137 | .wHeadsAndSectors:
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| 138 | .bHeads resb 1 ; User specified Heads (1...16)
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| 139 | .bSect resb 1 ; User specified Sectors per track (1...63)
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| 140 | endstruc
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| 141 |
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| 142 | ; Bit defines for DRVPARAMS.wFlags
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| 143 | MASK_DRVPARAMS_WRITECACHE EQU (3<<0) ; Drive internal write cache settings (must start at bit 0)
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| 144 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<2) ; Enable Block mode transfers
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| 145 | FLG_DRVPARAMS_USERCHS EQU (1<<3) ; User specified P-CHS values
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| 146 | FLG_DRVPARAMS_USERLBA EQU (1<<4) ; User specified LBA values
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| 147 |
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| 148 | ; Drive Write Cache values for DRVPARAMS.wFlags.MASK_DRVPARAMS_WRITECACHE
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| 149 | DEFAULT_WRITE_CACHE EQU 0 ; Must be 0
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| 150 | DISABLE_WRITE_CACHE EQU 1
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| 151 | ENABLE_WRITE_CACHE EQU 2
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| 152 |
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| 153 | %endif ; ROMVARS_INC
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