[148] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Int 13h function AH=9h, Initialize Drive Parameters. |
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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=9h, Initialize Drive Parameters. |
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| 9 | ; |
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| 10 | ; AH9h_HandlerForInitializeDriveParameters |
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| 11 | ; Parameters: |
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[148] | 12 | ; DL: Translated Drive number |
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| 13 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[150] | 14 | ; SS:BP: Ptr to IDEPACK |
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| 15 | ; Returns with INTPACK: |
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[3] | 16 | ; AH: Int 13h return status |
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[294] | 17 | ; CF: 0 if successful, 1 if error |
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[3] | 18 | ;-------------------------------------------------------------------- |
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| 19 | AH9h_HandlerForInitializeDriveParameters: |
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[84] | 20 | %ifndef USE_186 |
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[3] | 21 | call AH9h_InitializeDriveForUse |
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[148] | 22 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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[84] | 23 | %else |
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[148] | 24 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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[162] | 25 | ; Fall to AH9h_InitializeDriveForUse |
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[84] | 26 | %endif |
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[3] | 27 | |
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| 28 | |
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| 29 | ;-------------------------------------------------------------------- |
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| 30 | ; Initialized drive to be ready for use. |
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| 31 | ; |
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| 32 | ; AH9h_InitializeDriveForUse |
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| 33 | ; Parameters: |
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[148] | 34 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[150] | 35 | ; SS:BP: Ptr to IDEPACK |
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[3] | 36 | ; Returns: |
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| 37 | ; AH: Int 13h return status |
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[294] | 38 | ; CF: 0 if successful, 1 if error |
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[3] | 39 | ; Corrupts registers: |
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[363] | 40 | ; AL, BX, CX, DX |
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[3] | 41 | ;-------------------------------------------------------------------- |
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| 42 | AH9h_InitializeDriveForUse: |
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[363] | 43 | push es |
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[276] | 44 | push si |
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[3] | 45 | |
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[258] | 46 | %ifdef MODULE_SERIAL |
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[363] | 47 | ; no need to do this for serial devices |
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[258] | 48 | xor ah, ah |
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| 49 | test byte [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE ; Clears CF |
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[363] | 50 | jnz .ReturnWithErrorCodeInAH |
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| 51 | |
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| 52 | %else |
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[365] | 53 | ; Clear Initialization Error flags from DPT |
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| 54 | mov BYTE [di+DPT_ATA.bInitError], 0 |
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[258] | 55 | %endif |
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[294] | 56 | |
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[3] | 57 | ; Try to select drive and wait until ready |
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[150] | 58 | call AccessDPT_GetDriveSelectByteToAL |
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| 59 | mov [bp+IDEPACK.bDrvAndHead], al |
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| 60 | call Device_SelectDrive |
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[365] | 61 | mov al, FLG_INITERROR_FAILED_TO_SELECT_DRIVE |
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| 62 | call SetErrorFlagFromALwithErrorCodeInAH |
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[363] | 63 | jc SHORT .ReturnWithErrorCodeInAH |
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[3] | 64 | |
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| 65 | ; Initialize CHS parameters if LBA is not used |
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[150] | 66 | call InitializeDeviceParameters |
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[365] | 67 | mov al, FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS |
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| 68 | call SetErrorFlagFromALwithErrorCodeInAH |
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[3] | 69 | |
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[276] | 70 | ; Enable or Disable Write Cache |
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[279] | 71 | call SetWriteCache |
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[365] | 72 | mov al, FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE |
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| 73 | call SetErrorFlagFromALwithErrorCodeInAH |
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[276] | 74 | |
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[3] | 75 | ; Recalibrate drive by seeking to cylinder 0 |
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| 76 | .RecalibrateDrive: |
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| 77 | call AH11h_RecalibrateDrive |
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[365] | 78 | mov al, FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE |
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| 79 | call SetErrorFlagFromALwithErrorCodeInAH |
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[3] | 80 | |
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| 81 | ; Initialize block mode transfers |
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| 82 | .InitializeBlockMode: |
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[150] | 83 | call InitializeBlockMode |
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[365] | 84 | mov al, FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE |
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| 85 | call SetErrorFlagFromALwithErrorCodeInAH |
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[3] | 86 | |
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[363] | 87 | %ifdef MODULE_ADVANCED_ATA |
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| 88 | ; Initialize fastest supported PIO mode |
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| 89 | .InitializePioMode: |
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| 90 | call InitializePioMode |
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[365] | 91 | mov al, FLG_INITERROR_FAILED_TO_SET_PIO_MODE |
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| 92 | call SetErrorFlagFromALwithErrorCodeInAH |
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[363] | 93 | %endif |
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| 94 | |
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| 95 | ; There might have been several errors so just return |
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| 96 | ; one error code for them all |
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[365] | 97 | cmp BYTE [di+DPT_ATA.bInitError], 0 |
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| 98 | je SHORT .ReturnWithErrorCodeInAH |
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[363] | 99 | mov ah, RET_HD_RESETFAIL |
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| 100 | stc |
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| 101 | |
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| 102 | .ReturnWithErrorCodeInAH: |
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[276] | 103 | pop si |
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[363] | 104 | pop es |
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[3] | 105 | ret |
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| 106 | |
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| 107 | |
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| 108 | ;-------------------------------------------------------------------- |
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[150] | 109 | ; InitializeDeviceParameters |
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[3] | 110 | ; Parameters: |
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[150] | 111 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 112 | ; SS:BP: Ptr to IDEPACK |
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[3] | 113 | ; Returns: |
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| 114 | ; AH: BIOS Error code |
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[294] | 115 | ; CF: Cleared if successful |
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[3] | 116 | ; Set if any error |
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| 117 | ; Corrupts registers: |
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[150] | 118 | ; AL, BX, CX, DX |
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[3] | 119 | ;-------------------------------------------------------------------- |
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[150] | 120 | InitializeDeviceParameters: |
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[3] | 121 | ; No need to initialize CHS parameters if LBA mode enabled |
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[158] | 122 | test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA ; Clear CF |
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[150] | 123 | jnz SHORT ReturnSuccessSinceInitializationNotNeeded |
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[3] | 124 | |
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[157] | 125 | ; Initialize Logical Sectors per Track and Max Head number |
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[227] | 126 | mov ah, [di+DPT.bPchsHeads] |
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[150] | 127 | dec ah ; Max Head number |
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[227] | 128 | mov dl, [di+DPT.bPchsSectors] ; Sectors per Track |
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[150] | 129 | mov al, COMMAND_INITIALIZE_DEVICE_PARAMETERS |
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| 130 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY) |
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| 131 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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[3] | 132 | |
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| 133 | |
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| 134 | ;-------------------------------------------------------------------- |
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[276] | 135 | ; SetWriteCache |
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| 136 | ; Parameters: |
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| 137 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 138 | ; Returns: |
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| 139 | ; AH: BIOS Error code |
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[294] | 140 | ; CF: Cleared if successful |
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[276] | 141 | ; Set if any error |
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| 142 | ; Corrupts registers: |
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| 143 | ; AL, BX, CX, DX, SI |
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| 144 | ;-------------------------------------------------------------------- |
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| 145 | SetWriteCache: |
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| 146 | call AccessDPT_GetPointerToDRVPARAMStoCSBX |
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| 147 | mov bl, [cs:bx+DRVPARAMS.wFlags] |
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| 148 | and bx, BYTE MASK_DRVPARAMS_WRITECACHE |
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| 149 | jz SHORT ReturnSuccessSinceInitializationNotNeeded ; DEFAULT_WRITE_CACHE |
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| 150 | mov si, [cs:bx+.rgbWriteCacheCommands] |
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| 151 | jmp AH23h_SetControllerFeatures |
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| 152 | |
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| 153 | .rgbWriteCacheCommands: |
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| 154 | db 0 ; DEFAULT_WRITE_CACHE |
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| 155 | db FEATURE_DISABLE_WRITE_CACHE ; DISABLE_WRITE_CACHE |
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| 156 | db FEATURE_ENABLE_WRITE_CACHE ; ENABLE_WRITE_CACHE |
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| 157 | |
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| 158 | |
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[363] | 159 | %ifdef MODULE_ADVANCED_ATA |
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[276] | 160 | ;-------------------------------------------------------------------- |
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[363] | 161 | ; InitializePioMode |
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| 162 | ; Parameters: |
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| 163 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 164 | ; Returns: |
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| 165 | ; AH: BIOS Error code |
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| 166 | ; CF: Cleared if successful |
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| 167 | ; Set if any error |
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| 168 | ; Corrupts registers: |
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| 169 | ; AL, BX, CX, DX |
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| 170 | ;-------------------------------------------------------------------- |
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| 171 | InitializePioMode: |
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[364] | 172 | mov dl, PIO_DEFAULT_MODE_DISABLE_IORDY |
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| 173 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_IORDY |
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| 174 | jz SHORT .IordyNotSupported |
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| 175 | |
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| 176 | ; Advanced PIO mode 3 and above |
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| 177 | mov dl, [di+DPT_ADVANCED_ATA.bPioMode] |
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| 178 | or dl, PIO_FLOW_CONTROL_MODE_xxx |
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| 179 | |
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| 180 | .IordyNotSupported: |
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[363] | 181 | mov si, FEATURE_SET_TRANSFER_MODE |
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| 182 | jmp AH23h_SetControllerFeatures |
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| 183 | %endif |
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| 184 | |
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| 185 | |
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| 186 | ;-------------------------------------------------------------------- |
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[150] | 187 | ; InitializeBlockMode |
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[3] | 188 | ; Parameters: |
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[150] | 189 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[3] | 190 | ; Returns: |
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| 191 | ; AH: BIOS Error code |
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[294] | 192 | ; CF: Cleared if successful |
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[3] | 193 | ; Set if any error |
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| 194 | ; Corrupts registers: |
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| 195 | ; AL, BX, CX, DX |
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| 196 | ;-------------------------------------------------------------------- |
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[150] | 197 | InitializeBlockMode: |
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[158] | 198 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Clear CF |
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[365] | 199 | jz SHORT .BlockModeNotSupportedOrDisabled |
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[276] | 200 | call AccessDPT_GetPointerToDRVPARAMStoCSBX |
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| 201 | test BYTE [cs:bx+DRVPARAMS.wFlags], FLG_DRVPARAMS_BLOCKMODE |
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[365] | 202 | jz SHORT .BlockModeNotSupportedOrDisabled |
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[363] | 203 | |
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[365] | 204 | ; Try block sizes until we find largest possible supported by drive |
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| 205 | mov bl, 128 |
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| 206 | .TryNextBlockSize: |
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| 207 | mov al, bl |
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| 208 | call AH24h_SetBlockSize |
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| 209 | jnc SHORT .SupportedBlockSizeFound |
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| 210 | shr bl, 1 ; Try next size |
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| 211 | jmp SHORT .TryNextBlockSize |
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| 212 | .SupportedBlockSizeFound: |
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| 213 | mov [di+DPT_ATA.bBlockSize], bl |
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| 214 | .BlockModeNotSupportedOrDisabled: |
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| 215 | ReturnSuccessSinceInitializationNotNeeded: |
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[363] | 216 | ret |
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| 217 | |
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| 218 | |
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| 219 | ;-------------------------------------------------------------------- |
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[365] | 220 | ; SetErrorFlagFromALwithErrorCodeInAH |
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[363] | 221 | ; Parameters: |
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| 222 | ; AH: BIOS Error Code |
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| 223 | ; AL: Error flag to set |
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| 224 | ; DS:DI: Ptr to DPT |
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| 225 | ; Returns: |
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| 226 | ; CF: Clear if no error |
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| 227 | ; Set if error flag was set |
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| 228 | ; Corrupts registers: |
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| 229 | ; BX, ES |
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| 230 | ;-------------------------------------------------------------------- |
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[365] | 231 | SetErrorFlagFromALwithErrorCodeInAH: |
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| 232 | jnc SHORT .NoErrorFlagToSet |
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[363] | 233 | cmp ah, RET_HD_INVALID |
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| 234 | jbe SHORT .IgnoreInvalidCommandError |
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| 235 | |
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[365] | 236 | or [di+DPT_ATA.bInitError], al |
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[363] | 237 | stc |
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| 238 | ret |
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| 239 | .IgnoreInvalidCommandError: |
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[276] | 240 | xor ah, ah |
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[365] | 241 | .NoErrorFlagToSet: |
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[3] | 242 | ret |
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