Changeset 160 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm

Timestamp:

May 4, 2011, 5:49:22 PM (14 years ago)

Author:

Tomi Tilli

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• Support for XTIDE mod now works.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm

@@ -10 +10 @@
 ;       DS:DI:  Ptr to Disk Parameter Table
 ;       ES:SI:  Ptr to 512-byte ATA information read from the drive
+;       CS:BP:  Ptr to IDEVARS for the controller
 ;   Returns:
 ;       Nothing
@@ -103 +104 @@
     xor     ax, ax
     ret
-
-
-;--------------------------------------------------------------------
-; Device_OutputALtoIdeRegisterInDL
-;   Parameters:
-;       AL:     Byte to output
-;       DL:     IDE Register
-;       DS:DI:  Ptr to DPT (in RAMVARS segment)
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       BX, DX
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-Device_OutputALtoIdeRegisterInDL:
-    mov     bx, IdeIO_OutputALtoIdeRegisterInDX
-    jmp     SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX
-
-
-;--------------------------------------------------------------------
-; Device_OutputALtoIdeControlBlockRegisterInDL
-;   Parameters:
-;       AL:     Byte to output
-;       DL:     IDE Control Block Register
-;       DS:DI:  Ptr to DPT (in RAMVARS segment)
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       BX, DX
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-Device_OutputALtoIdeControlBlockRegisterInDL:
-    mov     bx, IdeIO_OutputALtoIdeControlBlockRegisterInDX
-    jmp     SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX
-
-
-;--------------------------------------------------------------------
-; Device_InputToALfromIdeRegisterInDL
-;   Parameters:
-;       DL:     IDE Register
-;       DS:DI:  Ptr to DPT (in RAMVARS segment)
-;   Returns:
-;       AL:     Inputted byte
-;   Corrupts registers:
-;       BX, DX
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-Device_InputToALfromIdeRegisterInDL:
-    mov     bx, IdeIO_InputToALfromIdeRegisterInDX
-    ; Fall to TranslateRegisterAddressInDLifNecessaryThenJumpToBX
-
-
-;--------------------------------------------------------------------
-; TranslateRegisterAddressInDLifNecessaryThenJumpToBX
-;   Parameters:
-;       AL:     Byte to output (if output function in BX)
-;       DL:     IDE Register
-;       BX:     I/O function to jump to
-;       DS:DI:  Ptr to DPT (in RAMVARS segment)
-;   Returns:
-;       AL:     Inputted byte (if input function in BX)
-;   Corrupts registers:
-;       BX, DX
-;--------------------------------------------------------------------
-TranslateRegisterAddressInDLifNecessaryThenJumpToBX:
-    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_REVERSED_A0_AND_A3
-    jz      SHORT .JumpToIoFunctionInSI
-
-    ; Exchange address lines A0 and A3 from DL
-    mov     dh, MASK_A3_AND_A0_ADDRESS_LINES
-    and     dh, dl                          ; DH = 0, 1, 8 or 9, we can ignore 0 and 9
-    jz      SHORT .JumpToIoFunctionInSI     ; Jump out since DH is 0
-    xor     dh, MASK_A3_AND_A0_ADDRESS_LINES
-    jz      SHORT .JumpToIoFunctionInSI     ; Jump out since DH was 9
-    and     dl, ~MASK_A3_AND_A0_ADDRESS_LINES
-    or      dl, dh                          ; Address lines now reversed
-
-ALIGN JUMP_ALIGN
-.JumpToIoFunctionInSI:
-    push    bx
-    xor     dh, dh
-    eMOVZX  bx, BYTE [di+DPT.bIdevarsOffset]; CS:BX now points to IDEVARS
-    ret