| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Int 13h function AH=24h, Set Multiple Blocks.
|
|---|
| 3 |
|
|---|
| 4 | ; Section containing code
|
|---|
| 5 | SECTION .text
|
|---|
| 6 |
|
|---|
| 7 | ;--------------------------------------------------------------------
|
|---|
| 8 | ; Int 13h function AH=24h, Set Multiple Blocks.
|
|---|
| 9 | ;
|
|---|
| 10 | ; AH24h_HandlerForSetMultipleBlocks
|
|---|
| 11 | ; Parameters:
|
|---|
| 12 | ; AL: Same as in INTPACK
|
|---|
| 13 | ; DL: Translated Drive number
|
|---|
| 14 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 15 | ; SS:BP: Ptr to IDEPACK
|
|---|
| 16 | ; Parameters on INTPACK:
|
|---|
| 17 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
|
|---|
| 18 | ; Returns with INTPACK:
|
|---|
| 19 | ; AH: Int 13h return status
|
|---|
| 20 | ; CF: 0 if succesfull, 1 if error
|
|---|
| 21 | ;--------------------------------------------------------------------
|
|---|
| 22 | AH24h_HandlerForSetMultipleBlocks:
|
|---|
| 23 | %ifndef USE_186
|
|---|
| 24 | call AH24h_SetBlockSize
|
|---|
| 25 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
|
|---|
| 26 | %else
|
|---|
| 27 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
|
|---|
| 28 | ; Fall to AH24h_SetBlockSize
|
|---|
| 29 | %endif
|
|---|
| 30 |
|
|---|
| 31 |
|
|---|
| 32 | ;--------------------------------------------------------------------
|
|---|
| 33 | ; AH24h_SetBlockSize
|
|---|
| 34 | ; Parameters:
|
|---|
| 35 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
|
|---|
| 36 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 37 | ; SS:BP: Ptr to IDEPACK
|
|---|
| 38 | ; Returns:
|
|---|
| 39 | ; AH: Int 13h return status
|
|---|
| 40 | ; CF: 0 if succesfull, 1 if error
|
|---|
| 41 | ; Corrupts registers:
|
|---|
| 42 | ; AL, BX, CX, DX
|
|---|
| 43 | ;--------------------------------------------------------------------
|
|---|
| 44 | AH24h_SetBlockSize:
|
|---|
| 45 | push ax
|
|---|
| 46 | xchg dx, ax ; DL = Block size (Sector Count Register)
|
|---|
| 47 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Assume success
|
|---|
| 48 | mov al, COMMAND_SET_MULTIPLE_MODE
|
|---|
| 49 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
|
|---|
| 50 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
|
|---|
| 51 | pop bx
|
|---|
| 52 | jnc .StoreBlockSize
|
|---|
| 53 | mov bl, 1 ; Disable block mode
|
|---|
| 54 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_BLOCK_MODE_SUPPORTED
|
|---|
| 55 | .StoreBlockSize: ; Store new block size to DPT and return
|
|---|
| 56 | mov [di+DPT_ATA.bSetBlock], bl
|
|---|
| 57 | ret
|
|---|
