[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) |
---|
| 14 | ; SS:BP: Ptr to INTPACK |
---|
| 15 | ; Returns with INTPACK in SS:BP: |
---|
[3] | 16 | ; AH: Int 13h return status |
---|
| 17 | ; CF: 0 if succesfull, 1 if error |
---|
| 18 | ;-------------------------------------------------------------------- |
---|
| 19 | ALIGN JUMP_ALIGN |
---|
| 20 | AH9h_HandlerForInitializeDriveParameters: |
---|
[84] | 21 | %ifndef USE_186 |
---|
[3] | 22 | call AH9h_InitializeDriveForUse |
---|
[148] | 23 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
---|
[84] | 24 | %else |
---|
[148] | 25 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
---|
[84] | 26 | ; Fall through to AH9h_InitializeDriveForUse |
---|
| 27 | %endif |
---|
[3] | 28 | |
---|
| 29 | |
---|
| 30 | ;-------------------------------------------------------------------- |
---|
| 31 | ; Initialized drive to be ready for use. |
---|
| 32 | ; |
---|
| 33 | ; AH9h_InitializeDriveForUse |
---|
| 34 | ; Parameters: |
---|
[148] | 35 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
---|
[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 | ALIGN JUMP_ALIGN |
---|
| 43 | AH9h_InitializeDriveForUse: |
---|
| 44 | push cx |
---|
| 45 | |
---|
| 46 | ; Try to select drive and wait until ready |
---|
| 47 | or BYTE [di+DPT.bReset], MASK_RESET_ALL ; Everything uninitialized |
---|
| 48 | call HDrvSel_SelectDriveAndDisableIRQ |
---|
| 49 | jc SHORT .ReturnNotSuccessfull |
---|
| 50 | and BYTE [di+DPT.bReset], ~FLG_RESET_nDRDY ; Clear since success |
---|
| 51 | |
---|
| 52 | ; Initialize CHS parameters if LBA is not used |
---|
| 53 | call AH9h_InitializeDeviceParameters |
---|
| 54 | jc SHORT .RecalibrateDrive |
---|
| 55 | and BYTE [di+DPT.bReset], ~FLG_RESET_nINITPRMS |
---|
| 56 | |
---|
| 57 | ; Recalibrate drive by seeking to cylinder 0 |
---|
| 58 | ALIGN JUMP_ALIGN |
---|
| 59 | .RecalibrateDrive: |
---|
| 60 | call AH11h_RecalibrateDrive |
---|
| 61 | jc SHORT .InitializeBlockMode |
---|
| 62 | and BYTE [di+DPT.bReset], ~FLG_RESET_nRECALIBRATE |
---|
| 63 | |
---|
| 64 | ; Initialize block mode transfers |
---|
| 65 | .InitializeBlockMode: |
---|
| 66 | call AH9h_InitializeBlockMode |
---|
| 67 | jc SHORT .ReturnNotSuccessfull |
---|
[148] | 68 | and BYTE [di+DPT.bReset], ~FLG_RESET_nSETBLOCK ; Keeps CF clear |
---|
[3] | 69 | |
---|
| 70 | .ReturnNotSuccessfull: |
---|
| 71 | pop cx |
---|
| 72 | ret |
---|
| 73 | |
---|
| 74 | |
---|
| 75 | ;-------------------------------------------------------------------- |
---|
| 76 | ; Sends Initialize Device Parameters command to IDE Hard Disk. |
---|
| 77 | ; Initialization is used to initialize logical CHS parameters. Drives |
---|
| 78 | ; may not support all CHS values. |
---|
| 79 | ; This command is only supported by drives that supports CHS addressing. |
---|
| 80 | ; |
---|
| 81 | ; AH9h_InitializeDeviceParameters |
---|
| 82 | ; Parameters: |
---|
| 83 | ; DS:DI: Ptr to DPT |
---|
| 84 | ; Returns: |
---|
| 85 | ; AH: BIOS Error code |
---|
| 86 | ; CF: Cleared if succesfull |
---|
| 87 | ; Set if any error |
---|
| 88 | ; Corrupts registers: |
---|
| 89 | ; AL, BX, CX |
---|
| 90 | ;-------------------------------------------------------------------- |
---|
| 91 | ALIGN JUMP_ALIGN |
---|
| 92 | AH9h_InitializeDeviceParameters: |
---|
| 93 | ; No need to initialize CHS parameters if LBA mode enabled |
---|
| 94 | test BYTE [di+DPT.bDrvSel], FLG_IDE_DRVHD_LBA ; Clears CF |
---|
| 95 | jnz SHORT .Return |
---|
| 96 | |
---|
| 97 | push dx |
---|
| 98 | mov bh, [di+DPT.bPHeads] |
---|
| 99 | dec bh ; Max head number |
---|
| 100 | mov dx, [RAMVARS.wIdeBase] |
---|
| 101 | call HCommand_OutputTranslatedLCHSaddress |
---|
| 102 | mov ah, HCMD_INIT_DEV |
---|
| 103 | mov al, [di+DPT.bPSect] ; Sectors per track |
---|
| 104 | call HCommand_OutputSectorCountAndCommand |
---|
| 105 | call HStatus_WaitBsyDefTime ; Wait until drive ready (DRDY won't be set!) |
---|
| 106 | pop dx |
---|
| 107 | .Return: |
---|
| 108 | ret |
---|
| 109 | |
---|
| 110 | |
---|
| 111 | ;-------------------------------------------------------------------- |
---|
| 112 | ; Initializes block mode transfers. |
---|
| 113 | ; |
---|
| 114 | ; AH9h_InitializeBlockMode |
---|
| 115 | ; Parameters: |
---|
| 116 | ; DS:DI: Ptr to DPT |
---|
| 117 | ; Returns: |
---|
| 118 | ; AH: BIOS Error code |
---|
| 119 | ; CF: Cleared if succesfull |
---|
| 120 | ; Set if any error |
---|
| 121 | ; Corrupts registers: |
---|
| 122 | ; AL, BX, CX, DX |
---|
| 123 | ;-------------------------------------------------------------------- |
---|
| 124 | ALIGN JUMP_ALIGN |
---|
| 125 | AH9h_InitializeBlockMode: |
---|
| 126 | mov ax, FLG_DRVPARAMS_BLOCKMODE |
---|
| 127 | call AccessDPT_TestIdeVarsFlagsForMasterOrSlaveDrive |
---|
| 128 | jz SHORT .Return ; Block mode disabled (CF cleared) |
---|
| 129 | eMOVZX ax, BYTE [di+DPT.bMaxBlock] ; Load max block size, zero AH |
---|
| 130 | test al, al ; Block mode supported? (clears CF) |
---|
| 131 | jz SHORT .Return ; If not, return |
---|
| 132 | jmp AH24h_SetBlockSize |
---|
| 133 | .Return: |
---|
| 134 | ret |
---|