[150] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : IDE Device Command functions. |
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| 3 | |
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[376] | 4 | ; |
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[445] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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[376] | 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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[445] | 12 | ; |
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[376] | 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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[445] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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[376] | 19 | |
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[150] | 20 | ; Section containing code |
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| 21 | SECTION .text |
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| 22 | |
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| 23 | ;-------------------------------------------------------------------- |
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| 24 | ; IdeCommand_ResetMasterAndSlaveController |
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| 25 | ; Parameters: |
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| 26 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 27 | ; Returns: |
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| 28 | ; AH: INT 13h Error Code |
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| 29 | ; CF: Cleared if success, Set if error |
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| 30 | ; Corrupts registers: |
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| 31 | ; AL, BX, CX, DX |
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| 32 | ;-------------------------------------------------------------------- |
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[400] | 33 | IdeCommand_ResetMasterAndSlaveController: |
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[150] | 34 | ; HSR0: Set_SRST |
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| 35 | call AccessDPT_GetDeviceControlByteToAL |
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| 36 | or al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN ; Set Reset bit |
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[267] | 37 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 38 | mov ax, HSR0_RESET_WAIT_US |
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[155] | 39 | call Timer_DelayMicrosecondsFromAX |
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[150] | 40 | |
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| 41 | ; HSR1: Clear_wait |
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| 42 | call AccessDPT_GetDeviceControlByteToAL |
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| 43 | or al, FLG_DEVCONTROL_nIEN |
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| 44 | and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit |
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[267] | 45 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 46 | mov ax, HSR1_RESET_WAIT_US |
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[155] | 47 | call Timer_DelayMicrosecondsFromAX |
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[150] | 48 | |
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| 49 | ; HSR2: Check_status |
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[432] | 50 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MAXIMUM, FLG_STATUS_BSY) |
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[400] | 51 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 52 | |
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| 53 | |
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| 54 | ;-------------------------------------------------------------------- |
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| 55 | ; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH |
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| 56 | ; Parameters: |
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| 57 | ; BH: Drive Select byte for Drive and Head Select Register |
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| 58 | ; DS: Segment to RAMVARS |
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| 59 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information |
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| 60 | ; CS:BP: Ptr to IDEVARS |
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| 61 | ; Returns: |
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| 62 | ; AH: INT 13h Error Code |
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| 63 | ; CF: Cleared if success, Set if error |
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| 64 | ; Corrupts registers: |
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[443] | 65 | ; AL, BX, CX, DX, SI, DI, ES |
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[150] | 66 | ;-------------------------------------------------------------------- |
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[400] | 67 | IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH: |
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[150] | 68 | ; Create fake DPT to be able to use Device.asm functions |
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| 69 | call FindDPT_ForNewDriveToDSDI |
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[158] | 70 | eMOVZX ax, bh |
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[150] | 71 | mov [di+DPT.wFlags], ax |
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| 72 | mov [di+DPT.bIdevarsOffset], bp |
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[365] | 73 | mov BYTE [di+DPT_ATA.bBlockSize], 1 ; Block = 1 sector |
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[363] | 74 | call IdeDPT_StoreDeviceTypeFromIdevarsInCSBPtoDPTinDSDI |
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[150] | 75 | |
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[443] | 76 | ; Wait until drive motors have reached full speed |
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[442] | 77 | cmp bp, BYTE ROMVARS.ideVars0 ; First controller? |
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[150] | 78 | jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster |
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[442] | 79 | test bh, FLG_DRVNHEAD_DRV ; Wait already done for Master |
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[150] | 80 | jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster |
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[445] | 81 | call AHDh_WaitUntilDriveMotorHasReachedFullSpeed |
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[150] | 82 | .SkipLongWaitSinceDriveIsNotPrimaryMaster: |
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| 83 | |
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| 84 | ; Create IDEPACK without INTPACK |
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| 85 | push bp |
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| 86 | call Idepack_FakeToSSBP |
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| 87 | |
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[439] | 88 | %ifdef MODULE_8BIT_IDE |
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[437] | 89 | ; Enable 8-bit PIO mode for Lo-tech XT-CF |
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[443] | 90 | push si |
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[437] | 91 | call AH9h_Enable8bitPioModeForXTCF |
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[443] | 92 | pop si |
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[439] | 93 | jc SHORT .FailedToSet8bitMode |
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| 94 | %endif |
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[437] | 95 | |
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[150] | 96 | ; Prepare to output Identify Device command |
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| 97 | mov dl, 1 ; Sector count (required by IdeTransfer.asm) |
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| 98 | mov al, COMMAND_IDENTIFY_DEVICE |
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[411] | 99 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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[150] | 100 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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| 101 | |
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| 102 | ; Clean stack and return |
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[439] | 103 | .FailedToSet8bitMode: |
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[443] | 104 | lea sp, [bp+SIZE_OF_IDEPACK_WITHOUT_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here |
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[150] | 105 | pop bp |
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| 106 | ret |
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| 107 | |
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| 108 | |
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| 109 | ;-------------------------------------------------------------------- |
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| 110 | ; IdeCommand_OutputWithParameters |
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| 111 | ; Parameters: |
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| 112 | ; BH: System timer ticks for timeout |
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| 113 | ; BL: IDE Status Register bit to poll after command |
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| 114 | ; ES:SI: Ptr to buffer (for data transfer commands) |
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| 115 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 116 | ; SS:BP: Ptr to IDEPACK |
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| 117 | ; Returns: |
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| 118 | ; AH: INT 13h Error Code |
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[249] | 119 | ; CX: Number of successfully transferred sectors (for transfer commands) |
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[150] | 120 | ; CF: Cleared if success, Set if error |
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| 121 | ; Corrupts registers: |
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[249] | 122 | ; AL, BX, (CX), DX, (ES:SI for data transfer commands) |
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[150] | 123 | ;-------------------------------------------------------------------- |
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| 124 | ALIGN JUMP_ALIGN |
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[400] | 125 | IdeCommand_OutputWithParameters: |
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[158] | 126 | push bx ; Store status register bits to poll |
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[150] | 127 | |
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| 128 | ; Select Master or Slave drive and output head number or LBA28 top bits |
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[400] | 129 | call IdeCommand_SelectDrive |
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[150] | 130 | jc SHORT .DriveNotReady |
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| 131 | |
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| 132 | ; Output Device Control Byte to enable or disable interrupts |
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| 133 | mov al, [bp+IDEPACK.bDeviceControl] |
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[400] | 134 | %ifdef MODULE_IRQ |
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[158] | 135 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled? |
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[152] | 136 | jnz SHORT .DoNotSetInterruptInServiceFlag |
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[158] | 137 | |
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| 138 | ; Clear Task Flag and set Interrupt In-Service Flag |
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| 139 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE |
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[152] | 140 | push ds |
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[158] | 141 | LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX |
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| 142 | mov [BDA.bHDTaskFlg], dl |
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[152] | 143 | pop ds |
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| 144 | .DoNotSetInterruptInServiceFlag: |
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[266] | 145 | %endif |
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[267] | 146 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 147 | |
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| 148 | ; Output Feature Number |
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| 149 | mov al, [bp+IDEPACK.bFeatures] |
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[267] | 150 | OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out |
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[150] | 151 | |
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| 152 | ; Output Sector Address High (only used by LBA48) |
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[285] | 153 | %ifdef MODULE_EBIOS |
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[294] | 154 | eMOVZX ax, [bp+IDEPACK.bLbaLowExt] ; Zero sector count |
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[150] | 155 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt] |
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[400] | 156 | call OutputSectorCountAndAddress |
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[285] | 157 | %endif |
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[150] | 158 | |
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| 159 | ; Output Sector Address Low |
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| 160 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow] |
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| 161 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh] |
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[400] | 162 | call OutputSectorCountAndAddress |
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[150] | 163 | |
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| 164 | ; Output command |
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| 165 | mov al, [bp+IDEPACK.bCommand] |
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[267] | 166 | OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out |
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[150] | 167 | |
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| 168 | ; Wait until command completed |
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[400] | 169 | pop bx ; Pop status and timeout for polling |
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| 170 | cmp bl, FLG_STATUS_DRQ ; Data transfer started? |
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| 171 | jne SHORT .WaitUntilNonTransferCommandCompletes |
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| 172 | %ifdef MODULE_JRIDE |
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| 173 | cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_JRIDE_ISA |
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| 174 | je SHORT JrIdeTransfer_StartWithCommandInAL |
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| 175 | %endif |
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| 176 | jmp IdeTransfer_StartWithCommandInAL |
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| 177 | |
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| 178 | .WaitUntilNonTransferCommandCompletes: |
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| 179 | %ifdef MODULE_IRQ |
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[150] | 180 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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[400] | 181 | jz SHORT .PollStatusFlagInsteadOfWaitIrq |
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| 182 | jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 183 | .PollStatusFlagInsteadOfWaitIrq: |
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| 184 | %endif |
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| 185 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 186 | |
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| 187 | .DriveNotReady: |
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| 188 | pop bx ; Clean stack |
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| 189 | ret |
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| 190 | |
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| 191 | |
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| 192 | ;-------------------------------------------------------------------- |
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| 193 | ; IdeCommand_SelectDrive |
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| 194 | ; Parameters: |
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| 195 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 196 | ; SS:BP: Ptr to IDEPACK |
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| 197 | ; Returns: |
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| 198 | ; AH: INT 13h Error Code |
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| 199 | ; CF: Cleared if success, Set if error |
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| 200 | ; Corrupts registers: |
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| 201 | ; AL, BX, CX, DX |
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| 202 | ;-------------------------------------------------------------------- |
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| 203 | ALIGN JUMP_ALIGN |
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[400] | 204 | IdeCommand_SelectDrive: |
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[444] | 205 | ; We use different timeout value when detecting drives. |
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| 206 | ; This prevents unnecessary long delays when drive is not present. |
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| 207 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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| 208 | cmp WORD [RAMVARS.wDrvDetectSignature], RAMVARS_DRV_DETECT_SIGNATURE |
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| 209 | eCMOVE bh, TIMEOUT_SELECT_DRIVE_DURING_DRIVE_DETECTION |
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[408] | 210 | |
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[150] | 211 | ; Select Master or Slave Drive |
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| 212 | mov al, [bp+IDEPACK.bDrvAndHead] |
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[267] | 213 | OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER |
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[400] | 214 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 215 | |
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[281] | 216 | ; Ignore errors from IDE Error Register (set by previous command) |
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[285] | 217 | cmp ah, RET_HD_TIMEOUT |
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| 218 | je SHORT .FailedToSelectDrive |
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| 219 | xor ax, ax ; Always success unless timeout |
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| 220 | ret |
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| 221 | .FailedToSelectDrive: |
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[281] | 222 | stc |
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[279] | 223 | ret |
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[150] | 224 | |
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[279] | 225 | |
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[150] | 226 | ;-------------------------------------------------------------------- |
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| 227 | ; OutputSectorCountAndAddress |
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| 228 | ; Parameters: |
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| 229 | ; AH: LBA low bits (Sector Number) |
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| 230 | ; AL: Sector Count |
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| 231 | ; CL: LBA middle bits (Cylinder Number low) |
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| 232 | ; CH: LBA high bits (Cylinder Number high) |
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| 233 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 234 | ; Returns: |
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| 235 | ; Nothing |
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| 236 | ; Corrupts registers: |
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| 237 | ; AL, BX, DX |
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| 238 | ;-------------------------------------------------------------------- |
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| 239 | ALIGN JUMP_ALIGN |
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[400] | 240 | OutputSectorCountAndAddress: |
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[267] | 241 | OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER |
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[150] | 242 | |
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| 243 | mov al, ah |
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[267] | 244 | OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER |
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[150] | 245 | |
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| 246 | mov al, cl |
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[267] | 247 | OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER |
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[150] | 248 | |
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| 249 | mov al, ch |
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[267] | 250 | JUMP_TO_OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER |
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