| 1 | ; File name : RamVars.inc
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| 2 | ; Project name : IDE BIOS
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| 3 | ; Created date : 23.3.2010
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| 4 | ; Last update : 8.4.2010
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| 5 | ; Author : Tomi Tilli
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| 6 | ; Description : RAMVARS struct containing BIOS variables stored in RAM.
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| 7 | %ifndef RAMVARS_INC
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| 8 | %define RAMVARS_INC
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| 9 |
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| 10 | ; Segment when RAMVARS is stored to top of interrupt vectors.
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| 11 | SEGMENT_RAMVARS_TOP_OF_INTERRUPT_VECTORS EQU 30h
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| 12 |
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| 13 |
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| 14 | ; Variables for translating drive numbers.
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| 15 | struc XLATEVARS
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| 16 | .bFDSwap resb 1 ; Floppy Drive to swap to 00h and vice versa
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| 17 | .bHDSwap resb 1 ; Hard Drive to swap to 80h and vice versa
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| 18 | .bRecurCnt resb 1 ; INT 13h recursion counter for drive translation
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| 19 | resb 1 ; For WORD alignment
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| 20 | endstruc
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| 21 |
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| 22 | ; RAM Variables.
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| 23 | ; Variables should be kept to minimum since they might be located
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| 24 | ; at the top of interrupt vectors.
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| 25 | struc RAMVARS
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| 26 | .fpOldI13h resb 4 ; Far pointer to old INT 13h handler
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| 27 |
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| 28 | .dwI13DIDS: ; Temporary DI and DS storages when calling...
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| 29 | .wI13hDI: ; ...previous INT 13h handler
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| 30 | .wIdeBase resb 2 ; Base port address for currently handled controller
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| 31 |
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| 32 | .wI13hDS:
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| 33 | .bEndTime resb 1 ; Timeout ending time
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| 34 | resb 1 ; Alignment
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| 35 |
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| 36 | .wDrvCntAndFirst:
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| 37 | .bDrvCnt resb 1 ; Number of drives handled by this BIOS
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| 38 | .bFirstDrv resb 1 ; Number of first drive for this BIOS
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| 39 |
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| 40 | ; Variables for drive number translation
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| 41 | .xlateVars resb XLATEVARS_size
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| 42 | endstruc
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| 43 |
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| 44 | ; Full mode RAM variables.
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| 45 | struc FULLRAMVARS
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| 46 | .ramVars resb RAMVARS_size
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| 47 | .wSign resb 2 ; FULLRAMVARS signature for finding segment
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| 48 | .drv80hCompDPT resb COMPATIBLE_FDPT_size
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| 49 | .drv81hCompDPT resb COMPATIBLE_FDPT_size
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| 50 | endstruc
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| 51 |
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| 52 | W_SIGN_FULLRAMVARS EQU "fR" ; FULLRAMVARS signature
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| 53 |
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| 54 |
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| 55 | %endif ; RAMVARS_INC
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