| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Defines for ROMVARS struct containing variables stored
|
|---|
| 3 | ; in BIOS ROM.
|
|---|
| 4 | %ifndef ROMVARS_INC
|
|---|
| 5 | %define ROMVARS_INC
|
|---|
| 6 |
|
|---|
| 7 | ; ROM Variables. There are written to ROM image before flashing.
|
|---|
| 8 | struc ROMVARS
|
|---|
| 9 | .wRomSign resb 2 ; ROM Signature (AA55h)
|
|---|
| 10 | .bRomSize resb 1 ; ROM size in 512 byte blocks
|
|---|
| 11 | .rgbJump resb 3 ; First instruction to ROM init (jmp)
|
|---|
| 12 |
|
|---|
| 13 | .rgbSign resb 8 ; Signature for XTIDE Configurator Program
|
|---|
| 14 | .szTitle resb 31 ; BIOS title string
|
|---|
| 15 | .szVersion resb 23 ; BIOS version string
|
|---|
| 16 |
|
|---|
| 17 | .wFlags resb 2 ; Word for ROM flags
|
|---|
| 18 | .bIdeCnt resb 1 ; Number of available IDE controllers
|
|---|
| 19 | .bBootDrv resb 1 ; Boot Menu default drive
|
|---|
| 20 | .bBootDelay resb 1 ; Boot Menu selection delay in seconds
|
|---|
| 21 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives
|
|---|
| 22 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM
|
|---|
| 23 |
|
|---|
| 24 | .ideVars0 resb IDEVARS_size
|
|---|
| 25 | .ideVars1 resb IDEVARS_size
|
|---|
| 26 | .ideVars2 resb IDEVARS_size
|
|---|
| 27 | .ideVars3 resb IDEVARS_size
|
|---|
| 28 | endstruc
|
|---|
| 29 |
|
|---|
| 30 | ; Bit defines for ROMVARS.wFlags
|
|---|
| 31 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.)
|
|---|
| 32 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation
|
|---|
| 33 | FLG_ROMVARS_ROMBOOT EQU (1<<3) ; Include ROMBOOT to boot menu
|
|---|
| 34 | FLG_ROMVARS_MAXSIZE EQU (1<<5) ; Maximize size by sacrificing compatibility with some old BIOSes
|
|---|
| 35 |
|
|---|
| 36 |
|
|---|
| 37 | ; Controller specific variables
|
|---|
| 38 | struc IDEVARS
|
|---|
| 39 | .wPort resb 2 ; IDE Base Port for Command Block (usual) Registers
|
|---|
| 40 | .wPortCtrl resb 2 ; IDE Base Port for Control Block Registers
|
|---|
| 41 | .bBusType resb 1 ; Bus type
|
|---|
| 42 | .bIRQ resb 1 ; Interrupt Request Number
|
|---|
| 43 | .drvParamsMaster resb DRVPARAMS_size
|
|---|
| 44 | .drvParamsSlave resb DRVPARAMS_size
|
|---|
| 45 | endstruc
|
|---|
| 46 |
|
|---|
| 47 | ; Bus types for IDEVARS.bBusType
|
|---|
| 48 | BUS_TYPE_8_DUAL EQU (0<<1) ; XTIDE transfers with two 8-bit data ports
|
|---|
| 49 | BUS_TYPE_16 EQU (1<<1) ; Normal 16-bit AT-IDE transfers
|
|---|
| 50 | BUS_TYPE_32 EQU (2<<1) ; 32-bit VLB and PCI transfers
|
|---|
| 51 | BUS_TYPE_8_SINGLE EQU (3<<1) ; 8-bit transfers with single 8-bit data port
|
|---|
| 52 |
|
|---|
| 53 |
|
|---|
| 54 | ; Master/Slave drive specific parameters
|
|---|
| 55 | struc DRVPARAMS
|
|---|
| 56 | .wFlags resb 2 ; Drive flags
|
|---|
| 57 | .wCylinders resb 2 ; User specified cylinders (1...16383)
|
|---|
| 58 | .wSectAndHeads:
|
|---|
| 59 | .bSect resb 1 ; User specified Sectors per track (1...63)
|
|---|
| 60 | .bHeads resb 1 ; User specified Heads (1...16)
|
|---|
| 61 | endstruc
|
|---|
| 62 |
|
|---|
| 63 | ; Bit defines for DRVPARAMS.wFlags
|
|---|
| 64 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values
|
|---|
| 65 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers
|
|---|
| 66 |
|
|---|
| 67 |
|
|---|
| 68 | %endif ; ROMVARS_INC
|
|---|
