| [148] | 1 | ; Project name : XTIDE Universal BIOS |
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| [3] | 2 | ; Description : Int 13h function AH=24h, Set Multiple Blocks. |
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| 3 | |
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| 4 | ; Section containing code |
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| 5 | SECTION .text |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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| 8 | ; Int 13h function AH=24h, Set Multiple Blocks. |
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| 9 | ; |
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| 10 | ; AH24h_HandlerForSetMultipleBlocks |
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| 11 | ; Parameters: |
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| [148] | 12 | ; AL: Same as in INTPACK |
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| 13 | ; DL: Translated Drive number |
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| 14 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| [150] | 15 | ; SS:BP: Ptr to IDEPACK |
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| 16 | ; Parameters on INTPACK: |
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| [3] | 17 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128) |
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| [150] | 18 | ; Returns with INTPACK: |
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| [3] | 19 | ; AH: Int 13h return status |
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| [294] | 20 | ; CF: 0 if successful, 1 if error |
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| [3] | 21 | ;-------------------------------------------------------------------- |
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| 22 | AH24h_HandlerForSetMultipleBlocks: |
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| [84] | 23 | %ifndef USE_186 |
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| [3] | 24 | call AH24h_SetBlockSize |
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| [148] | 25 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| [84] | 26 | %else |
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| [148] | 27 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| [162] | 28 | ; Fall to AH24h_SetBlockSize |
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| [84] | 29 | %endif |
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| [3] | 30 | |
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| 31 | |
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| 32 | ;-------------------------------------------------------------------- |
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| 33 | ; AH24h_SetBlockSize |
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| 34 | ; Parameters: |
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| 35 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128) |
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| [148] | 36 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| [150] | 37 | ; SS:BP: Ptr to IDEPACK |
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| [3] | 38 | ; Returns: |
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| 39 | ; AH: Int 13h return status |
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| [294] | 40 | ; CF: 0 if successful, 1 if error |
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| [3] | 41 | ; Corrupts registers: |
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| [148] | 42 | ; AL, BX, CX, DX |
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| [3] | 43 | ;-------------------------------------------------------------------- |
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| 44 | AH24h_SetBlockSize: |
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| [150] | 45 | push ax |
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| 46 | xchg dx, ax ; DL = Block size (Sector Count Register) |
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| [232] | 47 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Assume success |
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| [150] | 48 | mov al, COMMAND_SET_MULTIPLE_MODE |
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| 49 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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| 50 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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| 51 | pop bx |
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| [181] | 52 | jnc .StoreBlockSize |
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| 53 | mov bl, 1 ; Disable block mode |
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| [232] | 54 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_BLOCK_MODE_SUPPORTED |
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| [181] | 55 | .StoreBlockSize: ; Store new block size to DPT and return |
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| 56 | mov [di+DPT_ATA.bSetBlock], bl |
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| [3] | 57 | ret |
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