[148] | 1 | ; Project name : XTIDE Universal BIOS
|
---|
[3] | 2 | ; Description : Int 13h function AH=9h, Initialize Drive Parameters.
|
---|
| 3 |
|
---|
| 4 | ; Section containing code
|
---|
| 5 | SECTION .text
|
---|
| 6 |
|
---|
| 7 | ;--------------------------------------------------------------------
|
---|
| 8 | ; Int 13h function AH=9h, Initialize Drive Parameters.
|
---|
| 9 | ;
|
---|
| 10 | ; AH9h_HandlerForInitializeDriveParameters
|
---|
| 11 | ; Parameters:
|
---|
[148] | 12 | ; DL: Translated Drive number
|
---|
| 13 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
---|
[150] | 14 | ; SS:BP: Ptr to IDEPACK
|
---|
| 15 | ; Returns with INTPACK:
|
---|
[3] | 16 | ; AH: Int 13h return status
|
---|
| 17 | ; CF: 0 if succesfull, 1 if error
|
---|
| 18 | ;--------------------------------------------------------------------
|
---|
| 19 | AH9h_HandlerForInitializeDriveParameters:
|
---|
[84] | 20 | %ifndef USE_186
|
---|
[3] | 21 | call AH9h_InitializeDriveForUse
|
---|
[148] | 22 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
|
---|
[84] | 23 | %else
|
---|
[148] | 24 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
|
---|
[162] | 25 | ; Fall to AH9h_InitializeDriveForUse
|
---|
[84] | 26 | %endif
|
---|
[3] | 27 |
|
---|
| 28 |
|
---|
| 29 | ;--------------------------------------------------------------------
|
---|
| 30 | ; Initialized drive to be ready for use.
|
---|
| 31 | ;
|
---|
| 32 | ; AH9h_InitializeDriveForUse
|
---|
| 33 | ; Parameters:
|
---|
[148] | 34 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
---|
[150] | 35 | ; SS:BP: Ptr to IDEPACK
|
---|
[3] | 36 | ; Returns:
|
---|
| 37 | ; AH: Int 13h return status
|
---|
| 38 | ; CF: 0 if succesfull, 1 if error
|
---|
| 39 | ; Corrupts registers:
|
---|
[148] | 40 | ; AL, BX, DX
|
---|
[3] | 41 | ;--------------------------------------------------------------------
|
---|
| 42 | AH9h_InitializeDriveForUse:
|
---|
| 43 | push cx
|
---|
| 44 |
|
---|
| 45 | ; Try to select drive and wait until ready
|
---|
[158] | 46 | or BYTE [di+DPT.bFlagsHigh], MASKH_DPT_RESET ; Everything uninitialized
|
---|
[150] | 47 | call AccessDPT_GetDriveSelectByteToAL
|
---|
| 48 | mov [bp+IDEPACK.bDrvAndHead], al
|
---|
| 49 | call Device_SelectDrive
|
---|
[3] | 50 | jc SHORT .ReturnNotSuccessfull
|
---|
[158] | 51 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_RESET_nDRDY ; Clear since success
|
---|
[3] | 52 |
|
---|
| 53 | ; Initialize CHS parameters if LBA is not used
|
---|
[150] | 54 | call InitializeDeviceParameters
|
---|
[3] | 55 | jc SHORT .RecalibrateDrive
|
---|
[158] | 56 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_RESET_nINITPRMS
|
---|
[3] | 57 |
|
---|
| 58 | ; Recalibrate drive by seeking to cylinder 0
|
---|
| 59 | .RecalibrateDrive:
|
---|
| 60 | call AH11h_RecalibrateDrive
|
---|
| 61 | jc SHORT .InitializeBlockMode
|
---|
[158] | 62 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_RESET_nRECALIBRATE
|
---|
[3] | 63 |
|
---|
| 64 | ; Initialize block mode transfers
|
---|
| 65 | .InitializeBlockMode:
|
---|
[150] | 66 | call InitializeBlockMode
|
---|
[3] | 67 | jc SHORT .ReturnNotSuccessfull
|
---|
[158] | 68 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_RESET_nSETBLOCK ; Keeps CF clear
|
---|
[3] | 69 |
|
---|
| 70 | .ReturnNotSuccessfull:
|
---|
| 71 | pop cx
|
---|
| 72 | ret
|
---|
| 73 |
|
---|
| 74 |
|
---|
| 75 | ;--------------------------------------------------------------------
|
---|
[150] | 76 | ; InitializeDeviceParameters
|
---|
[3] | 77 | ; Parameters:
|
---|
[150] | 78 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
---|
| 79 | ; SS:BP: Ptr to IDEPACK
|
---|
[3] | 80 | ; Returns:
|
---|
| 81 | ; AH: BIOS Error code
|
---|
| 82 | ; CF: Cleared if succesfull
|
---|
| 83 | ; Set if any error
|
---|
| 84 | ; Corrupts registers:
|
---|
[150] | 85 | ; AL, BX, CX, DX
|
---|
[3] | 86 | ;--------------------------------------------------------------------
|
---|
[150] | 87 | InitializeDeviceParameters:
|
---|
[3] | 88 | ; No need to initialize CHS parameters if LBA mode enabled
|
---|
[158] | 89 | test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA ; Clear CF
|
---|
[150] | 90 | jnz SHORT ReturnSuccessSinceInitializationNotNeeded
|
---|
[3] | 91 |
|
---|
[157] | 92 | ; Initialize Logical Sectors per Track and Max Head number
|
---|
[227] | 93 | mov ah, [di+DPT.bPchsHeads]
|
---|
[150] | 94 | dec ah ; Max Head number
|
---|
[227] | 95 | mov dl, [di+DPT.bPchsSectors] ; Sectors per Track
|
---|
[150] | 96 | mov al, COMMAND_INITIALIZE_DEVICE_PARAMETERS
|
---|
| 97 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
|
---|
| 98 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL
|
---|
[3] | 99 |
|
---|
| 100 |
|
---|
| 101 | ;--------------------------------------------------------------------
|
---|
[150] | 102 | ; InitializeBlockMode
|
---|
[3] | 103 | ; Parameters:
|
---|
[150] | 104 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
---|
[3] | 105 | ; Returns:
|
---|
| 106 | ; AH: BIOS Error code
|
---|
| 107 | ; CF: Cleared if succesfull
|
---|
| 108 | ; Set if any error
|
---|
| 109 | ; Corrupts registers:
|
---|
| 110 | ; AL, BX, CX, DX
|
---|
| 111 | ;--------------------------------------------------------------------
|
---|
[150] | 112 | InitializeBlockMode:
|
---|
[158] | 113 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Clear CF
|
---|
[150] | 114 | jz SHORT ReturnSuccessSinceInitializationNotNeeded
|
---|
| 115 |
|
---|
| 116 | mov al, [di+DPT_ATA.bMaxBlock] ; Load max block size, zero AH
|
---|
[3] | 117 | jmp AH24h_SetBlockSize
|
---|
[150] | 118 | ReturnSuccessSinceInitializationNotNeeded:
|
---|
[3] | 119 | ret
|
---|