| [116] | 1 | ; Project name : XTIDE Universal BIOS |
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| [3] | 2 | ; Description : Int 13h function AH=Ch, Seek. |
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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=Ch, Seek. |
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| 9 | ; |
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| 10 | ; AHCh_HandlerForSeek |
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| 11 | ; Parameters: |
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| [148] | 12 | ; CX, DH: 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 IDEREGS_AND_INTPACK |
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| 16 | ; Parameters on INTPACK: |
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| [3] | 17 | ; CH: Cylinder number, bits 7...0 |
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| 18 | ; CL: Bits 7...6: Cylinder number bits 9 and 8 |
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| 19 | ; Bits 5...0: Starting sector number (1...63) |
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| 20 | ; DH: Starting head number (0...255) |
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| [150] | 21 | ; Returns with INTPACK: |
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| [3] | 22 | ; AH: BIOS Error code |
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| [294] | 23 | ; CF: 0 if successful, 1 if error |
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| [3] | 24 | ;-------------------------------------------------------------------- |
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| 25 | ALIGN JUMP_ALIGN |
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| 26 | AHCh_HandlerForSeek: |
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| [84] | 27 | %ifndef USE_186 |
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| [3] | 28 | call AHCh_SeekToCylinder |
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| [148] | 29 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| [84] | 30 | %else |
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| [148] | 31 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| [162] | 32 | ; Fall to AHCh_SeekToCylinder |
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| [84] | 33 | %endif |
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| [3] | 34 | |
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| 35 | ;-------------------------------------------------------------------- |
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| 36 | ; AHCh_SeekToCylinder |
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| 37 | ; Parameters: |
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| 38 | ; CH: Cylinder number, bits 7...0 |
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| 39 | ; CL: Bits 7...6: Cylinder number bits 9 and 8 |
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| 40 | ; Bits 5...0: Starting sector number (1...63) |
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| 41 | ; DH: Starting head number (0...255) |
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| [148] | 42 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| [150] | 43 | ; SS:BP: Ptr to IDEREGS_AND_INTPACK |
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| [3] | 44 | ; Returns: |
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| 45 | ; AH: BIOS Error code |
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| [294] | 46 | ; CF: 0 if successful, 1 if error |
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| [3] | 47 | ; Corrupts registers: |
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| 48 | ; AL, BX, CX, DX |
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| 49 | ;-------------------------------------------------------------------- |
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| 50 | AHCh_SeekToCylinder: |
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| [150] | 51 | mov ah, COMMAND_SEEK |
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| 52 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY) |
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| 53 | jmp Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH |
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