[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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[363] | 45 | call ClearErrorFlagFromBootMenuInfo ; Do this for serial devices as well |
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[3] | 46 | |
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[258] | 47 | %ifdef MODULE_SERIAL |
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[363] | 48 | ; no need to do this for serial devices |
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[258] | 49 | xor ah, ah |
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| 50 | test byte [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE ; Clears CF |
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[363] | 51 | jnz .ReturnWithErrorCodeInAH |
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| 52 | |
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| 53 | %else |
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| 54 | ; Clear Initialization Error flag from DPT |
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| 55 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_INITERROR |
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[258] | 56 | %endif |
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[294] | 57 | |
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[3] | 58 | ; Try to select drive and wait until ready |
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[150] | 59 | call AccessDPT_GetDriveSelectByteToAL |
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| 60 | mov [bp+IDEPACK.bDrvAndHead], al |
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| 61 | call Device_SelectDrive |
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[363] | 62 | mov al, FLG_INIT_FAILED_TO_SELECT_DRIVE |
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| 63 | call SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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| 64 | jc SHORT .ReturnWithErrorCodeInAH |
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[3] | 65 | |
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| 66 | ; Initialize CHS parameters if LBA is not used |
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[150] | 67 | call InitializeDeviceParameters |
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[363] | 68 | mov al, FLG_INIT_FAILED_TO_INITIALIZE_CHS_PARAMETERS |
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| 69 | call SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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[3] | 70 | |
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[276] | 71 | ; Enable or Disable Write Cache |
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[279] | 72 | call SetWriteCache |
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[363] | 73 | mov al, FLG_INIT_FAILED_TO_SET_WRITE_CACHE |
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| 74 | call SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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[276] | 75 | |
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[3] | 76 | ; Recalibrate drive by seeking to cylinder 0 |
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| 77 | .RecalibrateDrive: |
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| 78 | call AH11h_RecalibrateDrive |
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[363] | 79 | mov al, FLG_INIT_FAILED_TO_RECALIBRATE_DRIVE |
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| 80 | call SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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[3] | 81 | |
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| 82 | ; Initialize block mode transfers |
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| 83 | .InitializeBlockMode: |
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[150] | 84 | call InitializeBlockMode |
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[363] | 85 | mov al, FLG_INIT_FAILED_TO_SET_BLOCK_MODE |
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| 86 | call SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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[3] | 87 | |
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[363] | 88 | %ifdef MODULE_ADVANCED_ATA |
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| 89 | ; Initialize fastest supported PIO mode |
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| 90 | .InitializePioMode: |
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| 91 | call InitializePioMode |
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| 92 | mov al, FLG_INIT_FAILED_TO_SET_PIO_MODE |
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| 93 | call SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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| 94 | %endif |
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| 95 | |
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| 96 | ; There might have been several errors so just return |
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| 97 | ; one error code for them all |
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| 98 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INITERROR |
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| 99 | jz SHORT .ReturnWithErrorCodeInAH |
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| 100 | mov ah, RET_HD_RESETFAIL |
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| 101 | stc |
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| 102 | |
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| 103 | .ReturnWithErrorCodeInAH: |
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[276] | 104 | pop si |
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[363] | 105 | pop es |
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[3] | 106 | ret |
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| 107 | |
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| 108 | |
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| 109 | ;-------------------------------------------------------------------- |
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[150] | 110 | ; InitializeDeviceParameters |
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[3] | 111 | ; Parameters: |
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[150] | 112 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 113 | ; SS:BP: Ptr to IDEPACK |
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[3] | 114 | ; Returns: |
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| 115 | ; AH: BIOS Error code |
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[294] | 116 | ; CF: Cleared if successful |
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[3] | 117 | ; Set if any error |
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| 118 | ; Corrupts registers: |
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[150] | 119 | ; AL, BX, CX, DX |
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[3] | 120 | ;-------------------------------------------------------------------- |
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[150] | 121 | InitializeDeviceParameters: |
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[3] | 122 | ; No need to initialize CHS parameters if LBA mode enabled |
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[158] | 123 | test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA ; Clear CF |
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[150] | 124 | jnz SHORT ReturnSuccessSinceInitializationNotNeeded |
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[3] | 125 | |
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[157] | 126 | ; Initialize Logical Sectors per Track and Max Head number |
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[227] | 127 | mov ah, [di+DPT.bPchsHeads] |
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[150] | 128 | dec ah ; Max Head number |
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[227] | 129 | mov dl, [di+DPT.bPchsSectors] ; Sectors per Track |
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[150] | 130 | mov al, COMMAND_INITIALIZE_DEVICE_PARAMETERS |
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| 131 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY) |
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| 132 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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[3] | 133 | |
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| 134 | |
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| 135 | ;-------------------------------------------------------------------- |
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[276] | 136 | ; SetWriteCache |
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| 137 | ; Parameters: |
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| 138 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 139 | ; Returns: |
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| 140 | ; AH: BIOS Error code |
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[294] | 141 | ; CF: Cleared if successful |
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[276] | 142 | ; Set if any error |
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| 143 | ; Corrupts registers: |
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| 144 | ; AL, BX, CX, DX, SI |
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| 145 | ;-------------------------------------------------------------------- |
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| 146 | SetWriteCache: |
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| 147 | call AccessDPT_GetPointerToDRVPARAMStoCSBX |
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| 148 | mov bl, [cs:bx+DRVPARAMS.wFlags] |
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| 149 | and bx, BYTE MASK_DRVPARAMS_WRITECACHE |
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| 150 | jz SHORT ReturnSuccessSinceInitializationNotNeeded ; DEFAULT_WRITE_CACHE |
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| 151 | mov si, [cs:bx+.rgbWriteCacheCommands] |
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| 152 | jmp AH23h_SetControllerFeatures |
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| 153 | |
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| 154 | .rgbWriteCacheCommands: |
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| 155 | db 0 ; DEFAULT_WRITE_CACHE |
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| 156 | db FEATURE_DISABLE_WRITE_CACHE ; DISABLE_WRITE_CACHE |
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| 157 | db FEATURE_ENABLE_WRITE_CACHE ; ENABLE_WRITE_CACHE |
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| 158 | |
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| 159 | |
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[363] | 160 | %ifdef MODULE_ADVANCED_ATA |
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[276] | 161 | ;-------------------------------------------------------------------- |
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[363] | 162 | ; InitializePioMode |
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| 163 | ; Parameters: |
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| 164 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 165 | ; Returns: |
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| 166 | ; AH: BIOS Error code |
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| 167 | ; CF: Cleared if successful |
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| 168 | ; Set if any error |
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| 169 | ; Corrupts registers: |
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| 170 | ; AL, BX, CX, DX |
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| 171 | ;-------------------------------------------------------------------- |
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| 172 | InitializePioMode: |
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[364] | 173 | mov dl, PIO_DEFAULT_MODE_DISABLE_IORDY |
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| 174 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_IORDY |
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| 175 | jz SHORT .IordyNotSupported |
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| 176 | |
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| 177 | ; Advanced PIO mode 3 and above |
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| 178 | mov dl, [di+DPT_ADVANCED_ATA.bPioMode] |
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| 179 | or dl, PIO_FLOW_CONTROL_MODE_xxx |
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| 180 | |
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| 181 | .IordyNotSupported: |
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[363] | 182 | mov si, FEATURE_SET_TRANSFER_MODE |
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| 183 | jmp AH23h_SetControllerFeatures |
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| 184 | %endif |
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| 185 | |
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| 186 | |
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| 187 | ;-------------------------------------------------------------------- |
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[150] | 188 | ; InitializeBlockMode |
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[3] | 189 | ; Parameters: |
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[150] | 190 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[3] | 191 | ; Returns: |
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| 192 | ; AH: BIOS Error code |
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[294] | 193 | ; CF: Cleared if successful |
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[3] | 194 | ; Set if any error |
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| 195 | ; Corrupts registers: |
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| 196 | ; AL, BX, CX, DX |
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| 197 | ;-------------------------------------------------------------------- |
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[150] | 198 | InitializeBlockMode: |
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[158] | 199 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Clear CF |
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[150] | 200 | jz SHORT ReturnSuccessSinceInitializationNotNeeded |
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| 201 | |
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[276] | 202 | call AccessDPT_GetPointerToDRVPARAMStoCSBX |
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| 203 | mov al, 1 ; Disable block mode |
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| 204 | test BYTE [cs:bx+DRVPARAMS.wFlags], FLG_DRVPARAMS_BLOCKMODE |
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| 205 | eCMOVNZ al, [di+DPT_ATA.bMaxBlock] ; Load max block size |
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[3] | 206 | jmp AH24h_SetBlockSize |
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[363] | 207 | |
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| 208 | |
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| 209 | ;-------------------------------------------------------------------- |
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| 210 | ; ClearErrorFlagFromBootMenuInfo |
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| 211 | ; Parameters: |
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| 212 | ; DS:DI: Ptr to DPT |
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| 213 | ; Returns: |
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| 214 | ; Nothing |
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| 215 | ; Corrupts registers: |
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| 216 | ; BX, ES |
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| 217 | ;-------------------------------------------------------------------- |
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| 218 | ClearErrorFlagFromBootMenuInfo: |
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| 219 | call BootMenuInfo_IsAvailable ; Load BOOTMENUINFO segment to ES |
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| 220 | jne SHORT .DoNotStoreErrorFlags |
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| 221 | call BootMenuInfo_ConvertDPTtoBX |
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| 222 | mov WORD [es:bx+BOOTMENUINFO.wInitErrorFlags], 0 ; Must clear whole WORD! |
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| 223 | .DoNotStoreErrorFlags: |
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| 224 | ret |
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| 225 | |
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| 226 | |
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| 227 | ;-------------------------------------------------------------------- |
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| 228 | ; SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo |
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| 229 | ; Parameters: |
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| 230 | ; AH: BIOS Error Code |
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| 231 | ; AL: Error flag to set |
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| 232 | ; DS:DI: Ptr to DPT |
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| 233 | ; Returns: |
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| 234 | ; CF: Clear if no error |
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| 235 | ; Set if error flag was set |
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| 236 | ; Corrupts registers: |
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| 237 | ; BX, ES |
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| 238 | ;-------------------------------------------------------------------- |
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| 239 | SetErrorFlagFromALwithErrorCodeInAHtoBootMenuInfo: |
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| 240 | jnc SHORT NoErrorFlagToSet |
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| 241 | cmp ah, RET_HD_INVALID |
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| 242 | jbe SHORT .IgnoreInvalidCommandError |
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| 243 | |
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| 244 | call BootMenuInfo_IsAvailable |
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| 245 | jne SHORT .BootvarsNotAvailableSoDoNotSetErrorFlag |
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| 246 | |
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| 247 | call BootMenuInfo_ConvertDPTtoBX |
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| 248 | or [es:bx+BOOTMENUINFO.wInitErrorFlags], al |
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| 249 | .BootvarsNotAvailableSoDoNotSetErrorFlag: |
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| 250 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INITERROR |
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| 251 | stc |
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| 252 | ret |
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| 253 | .IgnoreInvalidCommandError: |
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[150] | 254 | ReturnSuccessSinceInitializationNotNeeded: |
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[276] | 255 | xor ah, ah |
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[363] | 256 | NoErrorFlagToSet: |
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[3] | 257 | ret |
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