| [88] | 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| [3] | 2 | ; Description : RAMVARS struct containing BIOS variables stored in RAM.
|
|---|
| 3 | %ifndef RAMVARS_INC
|
|---|
| 4 | %define RAMVARS_INC
|
|---|
| 5 |
|
|---|
| 6 | ; Segment when RAMVARS is stored to top of interrupt vectors.
|
|---|
| [150] | 7 | LITE_MODE_RAMVARS_SEGMENT EQU 30h
|
|---|
| [3] | 8 |
|
|---|
| 9 |
|
|---|
| 10 | ; Variables for translating drive numbers.
|
|---|
| 11 | struc XLATEVARS
|
|---|
| 12 | .bFDSwap resb 1 ; Floppy Drive to swap to 00h and vice versa
|
|---|
| 13 | .bHDSwap resb 1 ; Hard Drive to swap to 80h and vice versa
|
|---|
| [148] | 14 | .bXlatedDrv resb 1 ; Drive number after translation
|
|---|
| [3] | 15 | resb 1 ; For WORD alignment
|
|---|
| 16 | endstruc
|
|---|
| 17 |
|
|---|
| 18 | ; RAM Variables.
|
|---|
| 19 | ; Variables should be kept to minimum since they might be located
|
|---|
| 20 | ; at the top of interrupt vectors.
|
|---|
| 21 | struc RAMVARS
|
|---|
| [148] | 22 | .fpOldI13h resb 4 ; Far pointer to old INT 13h handler
|
|---|
| [150] | 23 | .wSignature resb 2 ; Sign for finding stolen 1 kiB
|
|---|
| [155] | 24 | .bTimeoutTicksLeft resb 1
|
|---|
| 25 | .bLastTimeoutUpdate resb 1
|
|---|
| [3] | 26 |
|
|---|
| 27 | .wDrvCntAndFirst:
|
|---|
| [148] | 28 | .bDrvCnt resb 1 ; Number of drives handled by this BIOS
|
|---|
| 29 | .bFirstDrv resb 1 ; Number of first drive for this BIOS
|
|---|
| [3] | 30 |
|
|---|
| 31 | ; Variables for drive number translation
|
|---|
| 32 | .xlateVars resb XLATEVARS_size
|
|---|
| 33 | endstruc
|
|---|
| 34 |
|
|---|
| [150] | 35 | RAMVARS_SIGNATURE EQU "Xu" ; RAMVARS signature for .wSignature
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | struc IDEPACK
|
|---|
| 39 | .bDrvAndHead resb 1 ; LBA28 27...24
|
|---|
| 40 | .bFeatures resb 1
|
|---|
| 41 |
|
|---|
| 42 | .wSectorCountAndLbaLow:
|
|---|
| 43 | .bSectorCount resb 1
|
|---|
| 44 | .bSectorNumber:
|
|---|
| 45 | .bLbaLow resb 1 ; LBA 7...0
|
|---|
| 46 |
|
|---|
| 47 | .wCylinder:
|
|---|
| 48 | .wLbaMiddleAndHigh:
|
|---|
| 49 | .bLbaMiddle resb 1 ; LBA 15...8
|
|---|
| 50 | .bLbaHigh resb 1 ; LBA 23...16
|
|---|
| 51 |
|
|---|
| 52 | .bCommand resb 1
|
|---|
| 53 | .bDeviceControl resb 1 ; Offset 7 shared with PIOVARS
|
|---|
| 54 |
|
|---|
| 55 | ; Parameters for 48-bit LBA
|
|---|
| 56 | .wSectorCountHighAndLbaLowExt:
|
|---|
| 57 | .bSectorCountHighExt resb 1 ; LBA48 Sector Count 15...8
|
|---|
| 58 | .bLbaLowExt resb 1 ; LBA48 31...24
|
|---|
| 59 |
|
|---|
| 60 | .wLbaMiddleAndHighExt:
|
|---|
| 61 | .bLbaMiddleExt resb 1 ; LBA48 39...32
|
|---|
| 62 | .bLbaHighExt resb 1 ; LBA48 47...40
|
|---|
| 63 |
|
|---|
| 64 | .intpack resb INTPACK_size
|
|---|
| [3] | 65 | endstruc
|
|---|
| 66 |
|
|---|
| [155] | 67 | EXTRA_BYTES_FOR_INTPACK EQU (IDEPACK_size - INTPACK_size)
|
|---|
| [3] | 68 |
|
|---|
| 69 |
|
|---|
| 70 | %endif ; RAMVARS_INC
|
|---|
