[88] | 1 | ; Project name : XTIDE Universal BIOS |
---|
[3] | 2 | ; Description : Int 13h function AH=Dh, Reset Hard Disk (Alternate reset). |
---|
| 3 | |
---|
| 4 | ; Section containing code |
---|
| 5 | SECTION .text |
---|
| 6 | |
---|
| 7 | ;-------------------------------------------------------------------- |
---|
| 8 | ; Int 13h function AH=Dh, Reset Hard Disk (Alternate reset). |
---|
| 9 | ; |
---|
| 10 | ; AHDh_HandlerForResetHardDisk |
---|
| 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 | ALIGN JUMP_ALIGN |
---|
| 20 | AHDh_HandlerForResetHardDisk: |
---|
[84] | 21 | %ifndef USE_186 |
---|
[3] | 22 | call AHDh_ResetDrive |
---|
[148] | 23 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
---|
[84] | 24 | %else |
---|
[148] | 25 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
---|
[84] | 26 | ; Fall through to AHDh_ResetDrive |
---|
| 27 | %endif |
---|
[3] | 28 | |
---|
| 29 | |
---|
| 30 | ;-------------------------------------------------------------------- |
---|
| 31 | ; Resets hard disk. |
---|
| 32 | ; |
---|
| 33 | ; AHDh_ResetDrive |
---|
| 34 | ; Parameters: |
---|
| 35 | ; DL: Drive number |
---|
| 36 | ; DS: RAMVARS segment |
---|
[150] | 37 | ; SS:BP: Ptr to IDEPACK |
---|
[3] | 38 | ; Returns: |
---|
| 39 | ; AH: Int 13h return status |
---|
| 40 | ; CF: 0 if succesfull, 1 if error |
---|
| 41 | ; Corrupts registers: |
---|
[150] | 42 | ; AL, CX, SI, DI |
---|
[3] | 43 | ;-------------------------------------------------------------------- |
---|
| 44 | ALIGN JUMP_ALIGN |
---|
| 45 | AHDh_ResetDrive: |
---|
[26] | 46 | push dx |
---|
| 47 | push bx |
---|
| 48 | |
---|
[3] | 49 | call FindDPT_ForDriveNumber ; DS:DI now points to DPT |
---|
[33] | 50 | call Interrupts_UnmaskInterruptControllerForDriveInDSDI |
---|
[150] | 51 | call Device_ResetMasterAndSlaveController |
---|
[3] | 52 | ;jc SHORT .ReturnError ; CF would be set if slave drive present without master |
---|
| 53 | ; (error register has special values after reset) |
---|
| 54 | |
---|
| 55 | ; Initialize Master and Slave drives |
---|
[150] | 56 | eMOVZX bx, BYTE [di+DPT.bIdevarsOffset] |
---|
| 57 | mov dx, [cs:bx+IDEVARS.wPort] |
---|
| 58 | call InitializeMasterAndSlaveDriveFromPortInDX |
---|
[26] | 59 | |
---|
| 60 | pop bx |
---|
| 61 | pop dx |
---|
[3] | 62 | ret |
---|
| 63 | |
---|
| 64 | |
---|
| 65 | ;-------------------------------------------------------------------- |
---|
[150] | 66 | ; InitializeMasterAndSlaveDriveFromPortInDX |
---|
[3] | 67 | ; Parameters: |
---|
| 68 | ; DX: IDE Base Port address |
---|
[150] | 69 | ; SS:BP: Ptr to IDEPACK |
---|
[3] | 70 | ; Returns: |
---|
[26] | 71 | ; AH: Error code |
---|
[3] | 72 | ; CF: 0 if initialization succesfull |
---|
| 73 | ; 1 if any error |
---|
| 74 | ; Corrupts registers: |
---|
[150] | 75 | ; AL, BX, CX, DX, SI, DI |
---|
[3] | 76 | ;-------------------------------------------------------------------- |
---|
| 77 | ALIGN JUMP_ALIGN |
---|
[150] | 78 | InitializeMasterAndSlaveDriveFromPortInDX: |
---|
[3] | 79 | push dx ; Store base port address |
---|
| 80 | xor cx, cx ; Assume no errors |
---|
[150] | 81 | call FindDPT_ToDSDIForIdeMasterAtPortDX |
---|
[3] | 82 | jnc SHORT .InitializeSlave ; Master drive not present |
---|
| 83 | call AH9h_InitializeDriveForUse |
---|
| 84 | mov cl, ah ; Copy error code to CL |
---|
| 85 | .InitializeSlave: |
---|
| 86 | pop dx ; Restore base port address |
---|
[150] | 87 | call FindDPT_ToDSDIForIdeSlaveAtPortDX |
---|
[3] | 88 | jnc SHORT .CombineErrors ; Slave drive not present |
---|
| 89 | call AH9h_InitializeDriveForUse |
---|
| 90 | mov ch, ah ; Copy error code to CH |
---|
| 91 | .CombineErrors: |
---|
| 92 | or cl, ch ; OR error codes, clear CF |
---|
[116] | 93 | jz SHORT .Return |
---|
[26] | 94 | mov ah, RET_HD_RESETFAIL ; Load Reset Failed error code |
---|
[3] | 95 | stc |
---|
[116] | 96 | .Return: |
---|
[3] | 97 | ret |
---|