| 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 | ;
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| 6 | ; XTIDE Universal BIOS and Associated Tools
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| 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
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| 8 | ;
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| 9 | ; This program is free software; you can redistribute it and/or modify
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| 10 | ; it under the terms of the GNU General Public License as published by
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| 11 | ; the Free Software Foundation; either version 2 of the License, or
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| 12 | ; (at your option) any later version.
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| 13 | ;
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| 14 | ; This program is distributed in the hope that it will be useful,
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | ; GNU General Public License for more details.
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| 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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| 19 | ;
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| 20 |
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| 21 | ; Section containing code
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| 22 | SECTION .text
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| 23 |
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| 24 | ;--------------------------------------------------------------------
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| 25 | ; Int 13h function AH=23h, Set Controller Features Register.
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| 26 | ;
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| 27 | ; AH23h_HandlerForSetControllerFeatures
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| 28 | ; Parameters:
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| 29 | ; AL, CX: Same as in INTPACK
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| 30 | ; DL: Translated Drive number
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| 31 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 32 | ; SS:BP: Ptr to IDEPACK
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| 33 | ; Parameters on INTPACK:
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| 34 | ; AL: Feature Number (parameter to Features Register = subcommand)
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| 35 | ; (Parameter registers are undocumented, these are specific for this BIOS):
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| 36 | ; BL: Parameter to Sector Count Register (subcommand specific)
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| 37 | ; BH: Parameter to LBA Low / Sector Number Register (subcommand specific)
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| 38 | ; CL: Parameter to LBA Middle / Cylinder Low Register (subcommand specific)
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| 39 | ; CH: Parameter to LBA High / Cylinder High Register (subcommand specific)
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| 40 | ; Returns with INTPACK:
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| 41 | ; AH: Int 13h return status
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| 42 | ; CF: 0 if successful, 1 if error
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| 43 | ;--------------------------------------------------------------------
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| 44 | AH23h_HandlerForSetControllerFeatures:
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| 45 | xchg si, ax ; SI = Feature Number
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| 46 | mov dx, [bp+IDEPACK.intpack+INTPACK.bx]
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| 47 | %ifndef USE_186
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| 48 | call AH23h_SetControllerFeatures
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| 49 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 50 | %else
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| 51 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 52 | ; Fall to AH23h_SetControllerFeatures
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| 53 | %endif
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| 54 |
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| 55 |
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| 56 | ;--------------------------------------------------------------------
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| 57 | ; AH23h_SetControllerFeatures
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| 58 | ; Parameters:
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| 59 | ; DL: Parameter to Sector Count Register (subcommand specific)
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| 60 | ; DH: Parameter to LBA Low / Sector Number Register (subcommand specific)
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| 61 | ; CL: Parameter to LBA Middle / Cylinder Low Register (subcommand specific)
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| 62 | ; CH: Parameter to LBA High / Cylinder High Register (subcommand specific)
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| 63 | ; SI: Feature Number (parameter to Features Register = subcommand)
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| 64 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 65 | ; SS:BP: Ptr to IDEPACK
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| 66 | ; Returns:
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| 67 | ; AH: Int 13h return status
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| 68 | ; CF: 0 if successful, 1 if error
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| 69 | ; Corrupts registers:
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| 70 | ; AL, BX, CX, DX
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| 71 | ;--------------------------------------------------------------------
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| 72 | AH23h_SetControllerFeatures:
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| 73 | mov al, COMMAND_SET_FEATURES
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| 74 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
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| 75 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL
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| 76 |
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| 77 |
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| 78 | ;--------------------------------------------------------------------
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| 79 | ; AH23h_Enable8bitPioMode
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| 80 | ; AH23h_Disable8bitPioMode
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| 81 | ; Parameters:
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| 82 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 83 | ; SS:BP: Ptr to IDEPACK
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| 84 | ; Returns:
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| 85 | ; AH: Int 13h return status
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| 86 | ; CF: 0 if successful, 1 if error
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| 87 | ; Corrupts registers:
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| 88 | ; AL, BX, CX, DX, SI
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| 89 | ;--------------------------------------------------------------------
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| 90 | %ifdef MODULE_8BIT_IDE
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| 91 | AH23h_Enable8bitPioMode:
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| 92 | mov si, FEATURE_ENABLE_8BIT_PIO_TRANSFER_MODE
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| 93 | jmp SHORT AH23h_SetControllerFeatures
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| 94 | AH23h_Disable8bitPioMode:
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| 95 | mov si, FEATURE_DISABLE_8BIT_PIO_TRANSFER_MODE
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| 96 | call AH23h_SetControllerFeatures
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| 97 | xor ah, ah ; Clear error since modern drives might not understand the command and are
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| 98 | ret ; always in 16-bit mode anyway
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| 99 | %endif
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