| 1 | ; File name : RomVars.inc
|
|---|
| 2 | ; Project name : IDE BIOS
|
|---|
| 3 | ; Created date : 23.3.2010
|
|---|
| 4 | ; Last update : 1.5.2010
|
|---|
| 5 | ; Author : Tomi Tilli
|
|---|
| 6 | ; Description : Defines for ROMVARS struct containing variables stored
|
|---|
| 7 | ; in BIOS ROM.
|
|---|
| 8 | %ifndef ROMVARS_INC
|
|---|
| 9 | %define ROMVARS_INC
|
|---|
| 10 |
|
|---|
| 11 | ; ROM Variables. There are written to ROM image before flashing.
|
|---|
| 12 | struc ROMVARS
|
|---|
| 13 | .wRomSign resb 2 ; ROM Signature (AA55h)
|
|---|
| 14 | .bRomSize resb 1 ; ROM size in 512 byte blocks
|
|---|
| 15 | .rgbJump resb 5 ; First instruction to ROM init (jmp)
|
|---|
| 16 | ; Offset 8 (8h) starts here
|
|---|
| 17 | .rgbDate resb 8 ; BIOS build date string (mm/dd/yy)
|
|---|
| 18 | ; Offset 16 (10h) starts here
|
|---|
| 19 | .rgbSign resb 8 ; Signature for XTIDE Configurator Program
|
|---|
| 20 | .szTitle resb 31 ; BIOS title string
|
|---|
| 21 | .szVersion resb 25 ; BIOS version string
|
|---|
| 22 | ; Offset 80 (50h) starts here
|
|---|
| 23 | .wFlags resb 2 ; Word for ROM flags
|
|---|
| 24 | .bIdeCnt resb 1 ; Number of supported IDE controllers
|
|---|
| 25 | .bBootDrv resb 1 ; Boot Menu default drive
|
|---|
| 26 | .bBootMnuH resb 1 ; Boot Menu maximum height
|
|---|
| 27 | .bBootDelay resb 1 ; Boot Menu selection delay in seconds
|
|---|
| 28 | .bBootLdrType resb 1 ; Boot Loader type
|
|---|
| 29 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives
|
|---|
| 30 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM
|
|---|
| 31 | resb 7
|
|---|
| 32 | ; Offset 96 (60h) starts here
|
|---|
| 33 | ; Last IDEVARS must not start after offset FFh.
|
|---|
| 34 | .ideVars0 resb IDEVARS_size
|
|---|
| 35 | .ideVars1 resb IDEVARS_size
|
|---|
| 36 | .ideVars2 resb IDEVARS_size
|
|---|
| 37 | .ideVars3 resb IDEVARS_size
|
|---|
| 38 | .ideVars4 resb IDEVARS_size
|
|---|
| 39 | endstruc
|
|---|
| 40 |
|
|---|
| 41 | ; Bit defines for ROMVARS.wFlags
|
|---|
| 42 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.)
|
|---|
| 43 | FLG_ROMVARS_LATE EQU (1<<1) ; Late initialization
|
|---|
| 44 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation
|
|---|
| 45 | FLG_ROMVARS_ROMBOOT EQU (1<<3) ; Include ROMBOOT to boot menu
|
|---|
| 46 | FLG_ROMVARS_DRVNFO EQU (1<<4) ; Display drive info on boot menu
|
|---|
| 47 | FLG_ROMVARS_MAXSIZE EQU (1<<5) ; Maximize size by sacrificing compatibility with some old BIOSes
|
|---|
| 48 |
|
|---|
| 49 | ; Bootloader types for ROMVARS.bBootLdrType
|
|---|
| 50 | BOOTLOADER_TYPE_MENU EQU (0<<1) ; Display boot menu on boot loader
|
|---|
| 51 | BOOTLOADER_TYPE_SIMPLE EQU (1<<1) ; Simple bootloader without menu
|
|---|
| 52 | BOOTLOADER_TYPE_NONE EQU (3<<1) ; Do not install boot loader
|
|---|
| 53 |
|
|---|
| 54 |
|
|---|
| 55 | ; Controller specific variables
|
|---|
| 56 | struc IDEVARS
|
|---|
| 57 | .wPort resb 2 ; IDE Base Port for Command Block (usual) Registers
|
|---|
| 58 | .wPortCtrl resb 2 ; IDE Base Port for Control Block Registers
|
|---|
| 59 | .bBusType resb 1 ; Bus type
|
|---|
| 60 | .bIRQ resb 1 ; Interrupt Request Number
|
|---|
| 61 | resb 4 ; Reserved
|
|---|
| 62 | .drvParamsMaster resb DRVPARAMS_size
|
|---|
| 63 | .drvParamsSlave resb DRVPARAMS_size
|
|---|
| 64 | endstruc
|
|---|
| 65 |
|
|---|
| 66 | ; Bus types for IDEVARS.bBusType
|
|---|
| 67 | BUS_TYPE_8_DUAL EQU (0<<1) ; XTIDE transfers with two 8-bit data ports
|
|---|
| 68 | BUS_TYPE_16 EQU (1<<1) ; Normal 16-bit AT-IDE transfers
|
|---|
| 69 | BUS_TYPE_32 EQU (2<<1) ; 32-bit VLB and PCI transfers
|
|---|
| 70 | BUS_TYPE_8_SINGLE EQU (3<<1) ; 8-bit transfers with single 8-bit data port
|
|---|
| 71 |
|
|---|
| 72 |
|
|---|
| 73 | ; Master/Slave drive specific parameters
|
|---|
| 74 | struc DRVPARAMS
|
|---|
| 75 | .wFlags resb 2 ; Drive flags
|
|---|
| 76 | resb 2 ; Reserved
|
|---|
| 77 | .wCylinders resb 2 ; User specified cylinders (1...16383)
|
|---|
| 78 | .wSectAndHeads:
|
|---|
| 79 | .bSect resb 1 ; User specified Sectors per track (1...63)
|
|---|
| 80 | .bHeads resb 1 ; User specified Heads (1...16)
|
|---|
| 81 | endstruc
|
|---|
| 82 |
|
|---|
| 83 | ; Bit defines for DRVPARAMS.wFlags
|
|---|
| 84 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values
|
|---|
| 85 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers
|
|---|
| 86 |
|
|---|
| 87 |
|
|---|
| 88 | %endif ; ROMVARS_INC
|
|---|
