Changeset 501 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src


Ignore:
Timestamp:
Jan 26, 2013, 4:58:50 PM (12 years ago)
Author:
aitotat@…
google:author:
aitotat@gmail.com
Message:

Changes to XTIDE Universal BIOS:

  • XTIDE rev 2 and modded XTIDE rev 1 work again (fixed A0<->A3 swap when accessing Control Block Registers).
  • System INT 13h handler is no longer copied to INT 40h (testing if something uses INT 40h).
  • Removed controller hardware reset: now AH=0h and AH=Dh will only re-initialize drives (SB16 Tertiary and Quaternary IDE should now be safe to use when using Secondary IDE).
Location:
trunk/XTIDE_Universal_BIOS/Src
Files:
6 edited

Legend:

Unmodified
Added
Removed

  • trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm

    r480 r501  
    5555%else                   ; IDE
    5656    Device_FinalizeDPT      EQU     IdeDPT_Finalize
    57 %endif
    58 
    59 
    60 ;--------------------------------------------------------------------
    61 ; Device_ResetMasterAndSlaveController
    62 ;   Parameters:
    63 ;       DS:DI:  Ptr to DPT (in RAMVARS segment)
    64 ;   Returns:
    65 ;       AH:     INT 13h Error Code
    66 ;       CF:     Cleared if success, Set if error
    67 ;   Corrupts registers:
    68 ;       AL, BX, CX, DX
    69 ;--------------------------------------------------------------------
    70 %ifdef MODULE_SERIAL    ; IDE + Serial
    71 Device_ResetMasterAndSlaveController:
    72     TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE    ReturnSuccessForSerialPort
    73     jmp     IdeCommand_ResetMasterAndSlaveController
    74 
    75 %else                   ; IDE
    76     Device_ResetMasterAndSlaveController    EQU     IdeCommand_ResetMasterAndSlaveController
    7757%endif
    7858

  • trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeCommand.asm

    r493 r501  
    2020; Section containing code
    2121SECTION .text
    22 
    23 ;--------------------------------------------------------------------
    24 ; IdeCommand_ResetMasterAndSlaveController
    25 ;   Parameters:
    26 ;       DS:DI:  Ptr to DPT (in RAMVARS segment)
    27 ;   Returns:
    28 ;       AH:     INT 13h Error Code
    29 ;       CF:     Cleared if success, Set if error
    30 ;   Corrupts registers:
    31 ;       AL, BX, CX, DX
    32 ;--------------------------------------------------------------------
    33 IdeCommand_ResetMasterAndSlaveController:
    34     ; HSR0: Set_SRST
    35     call    AccessDPT_GetDeviceControlByteToAL
    36     or      al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN   ; Set Reset bit
    37     OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER     DEVICE_CONTROL_REGISTER_out
    38     mov     ax, HSR0_RESET_WAIT_US
    39     call    Timer_DelayMicrosecondsFromAX
    40 
    41     ; HSR1: Clear_wait
    42     call    AccessDPT_GetDeviceControlByteToAL
    43     or      al, FLG_DEVCONTROL_nIEN
    44     and     al, ~FLG_DEVCONTROL_SRST                        ; Clear reset bit
    45     OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER     DEVICE_CONTROL_REGISTER_out
    46     mov     ax, HSR1_RESET_WAIT_US
    47     call    Timer_DelayMicrosecondsFromAX
    48 
    49     ; HSR2: Check_status
    50     mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MAXIMUM, FLG_STATUS_BSY)
    51     jmp     IdeWait_PollStatusFlagInBLwithTimeoutInBH
    52 
    5322
    5423;--------------------------------------------------------------------

  • trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeIO.asm

    r496 r501  
    7777
    7878.ShlRegisterIndexInDX:
    79     eSHL_IM dx, 1
     79    shl     dx, 1
    8080    ; Fall to .InputToALfromRegisterInDX
    8181
    … …  
    9898;--------------------------------------------------------------------
    9999IdeIO_OutputALtoIdeControlBlockRegisterInDL:
    100     ; Note! We do not need to reverse A0 and A3 for XTIDE rev 2 since
    101     ; the only Control Block Register we access is DEVICE_CONTROL_REGISTER_out
    102     ; at offset 6 (0110b).
    103100    xor     dh, dh  ; IDE Register index now in DX
    104101
    105102    mov     bl, [di+DPT_ATA.bDevice]
    106103    cmp     bl, DEVICE_8BIT_XTIDE_REV2
    107     jbe     SHORT .OutputALtoControlBlockRegisterInDX   ; Standard IDE controllers and XTIDE rev 1
     104    je      SHORT .ReverseA0andA3fromRegisterIndexInDX
     105    jb      SHORT .OutputALtoControlBlockRegisterInDX   ; Standard IDE controllers and XTIDE rev 1
    108106
    109107%ifdef MODULE_8BIT_IDE_ADVANCED
    … …  
    117115%endif
    118116
     117.ReverseA0andA3fromRegisterIndexInDX:
     118    ; We cannot use lookup table since A3 will be always set because
     119    ; Control Block Registers start from Command Block + 8h. We can do
     120    ; a small trick since we only access Device Control Register at
     121    ; offset 6h: Always clear A3 and set A0.
     122    add     dx, [cs:bx+IDEVARS.wControlBlockPort]
     123    xor     dl, 1001b                       ; Clear A3, Set A0
     124    jmp     SHORT OutputALtoPortInDX
     125
    119126.ShlRegisterIndexInDX:
    120127    add     dl, XTCF_CONTROL_BLOCK_OFFSET
    121     eSHL_IM dx, 1
     128    shl     dx, 1
    122129    jmp     SHORT OutputALtoRegisterInDX
    123130
    … …  
    163170    ret
    164171%endif
    165        
     172
    166173.ReverseA0andA3fromRegisterIndexInDX:
    167174    mov     bx, dx
    … …  
    170177
    171178.ShlRegisterIndexInDX:
    172     eSHL_IM dx, 1
     179    shl     dx, 1
    173180    ; Fall to OutputALtoRegisterInDX
    174181

  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH0h_HReset.asm

    r491 r501  
    3838;--------------------------------------------------------------------
    3939AH0h_HandlerForDiskControllerReset:
    40     ; Reset Floppy Drives with INT 40h
    4140    xor     bx, bx                      ; Zero BH to assume no errors
    4241    or      bl, dl                      ; Copy requested drive to BL
    43     eCMOVS  dl, bh                      ; Reset Floppy Drive(s) with 00h since DL has Hard Drive number
    44 
    45     xor     ah, ah                      ; Disk Controller Reset
    46     int     BIOS_DISKETTE_INTERRUPT_40h
    47     call    BackupErrorCodeFromTheRequestedDriveToBH
    48     ; We do not reset Hard Drives if DL was 0xh on entry
    49 
    5042
    5143%ifdef MODULE_SERIAL_FLOPPY
    … …  
    6961%endif
    7062
    71     ; Reset foreign Hard Drives (those handled by other BIOSes)
     63    ; Reset foreign Floppy and Hard Drives (those handled by other BIOSes)
     64    call    ResetForeignDrives
    7265    test    bl, bl                                      ; If we were called with a floppy disk, then we are done,
    7366    jns     SHORT .SkipHardDiskReset                    ; don't do hard disks.
    74     call    ResetForeignHardDisks
    7567
    7668    ; Resetting our hard disks will modify dl and bl to be idevars offset based instead of drive number based,
    7769    ; such that this call must be the last in the list of reset routines called.
    7870    ;
    79     ; This needs to happen after ResetForeignHardDisks, as that call may have set the error code for 80h,
     71    ; This needs to happen after ResetForeignDrives, as that call may have set the error code for 80h,
    8072    ; and we need to override that value if we are xlate'd into 80h with one of our drives.
    8173    ;
    … …  
    8880
    8981;--------------------------------------------------------------------
    90 ; ResetForeignHardDisks
     82; ResetForeignDrives
    9183;   Parameters:
    92 ;       BL:     Requested Hard Drive (DL when entering AH=00h)
     84;       BL:     Requested Floppy or Hard Drive (DL when entering AH=00h)
    9385;       DS:     RAMVARS segment
    9486;   Returns:
    … …  
    9789;       AX, DL
    9890;--------------------------------------------------------------------
    99 ResetForeignHardDisks:
     91ResetForeignDrives:
    10092    ; If there are drives after our drives, those are already reset
    10193    ; since our INT 13h was called by some other BIOS.
    … …  
    10395    ; There could be more in chain but let the previous one handle them.
    10496    mov     dl, [RAMVARS.bFirstDrv]
    105     or      dl, 80h                 ; We may not have our drives at all!
    106     MIN_U   dl, bl                  ; BL is always Hard Drive number
     97    or      dl, 80h                 ; We may not have our drives at all so change 0 to 80h!
     98    MIN_U   dl, bl
    10799
    108100    xor     ah, ah                  ; Disk Controller Reset
    … …  
    135127; ResetHardDisksHandledByOurBIOS
    136128;   Parameters:
     129;       BL:     Requested drive (DL when entering AH=00h)
    137130;       DS:DI:  Ptr to DPT for requested drive
    138131;               If DPT pointer is not available, or error result in BH won't be used anyway,

  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AHDh_HReset.asm

    r473 r501  
    6565    call    Interrupts_UnmaskInterruptControllerForDriveInDSDI
    6666%endif
    67     call    Device_ResetMasterAndSlaveController
    68     ;jc     SHORT .ReturnError                  ; CF would be set if slave drive present without master
    69                                                 ; (error register has special values after reset)
    70 
    7167    ; Initialize Master and Slave drives
    7268    call    AccessDPT_GetIdevarsToCSBX

  • trunk/XTIDE_Universal_BIOS/Src/Initialization/Interrupts.asm

    r492 r501  
    6363    mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4]  ; Load old INT 13h offset
    6464    mov     [RAMVARS.fpOldI13h], ax             ; Store old INT 13h offset
     65
     66    ; NOTE! Installing INT 40h handler is currently uncommented to test
     67    ; if it is really needed. I suspect that it is not. Many bytes can be
     68    ; saved if INT 40h related code can be removed.
     69%if 0
    6570
    6671    ; Only store INT 13h handler to 40h if 40h is not already installed.
    … …  
    7277    mov     [es:BIOS_DISKETTE_INTERRUPT_40h*4+2], dx    ; Store old INT 13h segment
    7378.Int40hAlreadyInstalled:
     79%endif ; 0
    7480
    7581    mov     al, BIOS_DISK_INTERRUPT_13h         ; INT 13h interrupt vector offset
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