| 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Int 13h function AH=23h, |
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| 3 | ; Set Controller Features Register. |
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| 4 | |
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| 5 | ; Section containing code |
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| 6 | SECTION .text |
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| 7 | |
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| 8 | ;-------------------------------------------------------------------- |
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| 9 | ; Int 13h function AH=23h, Set Controller Features Register. |
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| 10 | ; |
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| 11 | ; AH23h_HandlerForSetControllerFeatures |
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| 12 | ; Parameters: |
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| 13 | ; AL, CX: Same as in INTPACK |
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| 14 | ; DL: Translated Drive number |
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| 15 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 16 | ; SS:BP: Ptr to IDEPACK |
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| 17 | ; Parameters on INTPACK: |
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| 18 | ; AL: Feature Number (parameter to Features Register = subcommand) |
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| 19 | ; (Parameter registers are undocumented, these are specific for this BIOS): |
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| 20 | ; BL: Parameter to Sector Count Register (subcommand specific) |
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| 21 | ; BH: Parameter to LBA Low / Sector Number Register (subcommand specific) |
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| 22 | ; CL: Parameter to LBA Middle / Cylinder Low Register (subcommand specific) |
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| 23 | ; CH: Parameter to LBA High / Cylinder High Register (subcommand specific) |
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| 24 | ; Returns with INTPACK: |
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| 25 | ; AH: Int 13h return status |
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| 26 | ; CF: 0 if successful, 1 if error |
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| 27 | ;-------------------------------------------------------------------- |
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| 28 | ALIGN JUMP_ALIGN |
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| 29 | AH23h_HandlerForSetControllerFeatures: |
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| 30 | xchg si, ax ; SI = Feature Number |
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| 31 | mov dx, [bp+IDEPACK.intpack+INTPACK.bx] |
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| 32 | %ifndef USE_186 |
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| 33 | call AH23h_SetControllerFeatures |
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| 34 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 35 | %else |
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| 36 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 37 | ; Fall to AH23h_SetControllerFeatures |
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| 38 | %endif |
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| 39 | |
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| 40 | |
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| 41 | ;-------------------------------------------------------------------- |
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| 42 | ; AH23h_SetControllerFeatures |
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| 43 | ; Parameters: |
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| 44 | ; DL: Parameter to Sector Count Register (subcommand specific) |
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| 45 | ; DH: Parameter to LBA Low / Sector Number Register (subcommand specific) |
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| 46 | ; CL: Parameter to LBA Middle / Cylinder Low Register (subcommand specific) |
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| 47 | ; CH: Parameter to LBA High / Cylinder High Register (subcommand specific) |
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| 48 | ; SI: Feature Number (parameter to Features Register = subcommand) |
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| 49 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 50 | ; SS:BP: Ptr to IDEPACK |
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| 51 | ; Returns: |
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| 52 | ; AH: Int 13h return status |
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| 53 | ; CF: 0 if successful, 1 if error |
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| 54 | ; Corrupts registers: |
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| 55 | ; AL, BX, CX, DX |
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| 56 | ;-------------------------------------------------------------------- |
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| 57 | ;ALIGN JUMP_ALIGN |
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| 58 | AH23h_SetControllerFeatures: |
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| 59 | mov al, COMMAND_SET_FEATURES |
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| 60 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY) |
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| 61 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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