| 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 succesfull, 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 through 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 succesfull, 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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