Changeset 480 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/Idepack.asm

Timestamp:

Oct 27, 2012, 11:26:11 AM (11 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• XT-CF DMA transfers should now work.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/Idepack.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Device/Idepack.asm

@@ -74 +74 @@
     mov     [bp+IDEPACK.bDrvAndHead], al
 
-    ; Normalize data buffer pointer to ES:SI
-%ifdef MODULE_8BIT_IDE
-    cmp     BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_DMA
-    jne     SHORT .NormalizeForSmallestPossibleOffset
-
-    ; DMA transfers do not need to normalize pointer
-    ; (it will be converted to physical address in IdeDmaTransfer.asm)
+    ; Load data buffer pointer to ES:SI
     les     si, [es:si+DAP.dwMemoryAddress]
-    jmp     SHORT GetDeviceControlByteToIdepackAndStartTransfer
-%endif ; MODULE_8BIT_IDE
-
-.NormalizeForSmallestPossibleOffset:
-    mov     ax, [es:si+DAP.wOffset]
-    mov     cx, ax
-    eSHR_IM ax, 4                               ; Divide offset by 16
-    add     ax, [es:si+DAP.wSegment]            ; Add segment
-    mov     es, ax                              ; Segment normalized
-    mov     si, cx
-    and     si, BYTE 0Fh                        ; Offset normalized
     jmp     SHORT GetDeviceControlByteToIdepackAndStartTransfer
 %endif ; MODULE_EBIOS