Changeset 477 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1Eh_XTCF.asm

Timestamp:

Oct 20, 2012, 5:04:32 PM (13 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Added non-working DMA transfer code.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1Eh_XTCF.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1Eh_XTCF.asm

@@ -112 +112 @@
     mov     BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_DMA
     mov     al, [di+DPT_ATA.bBlockSize]
-    jmp     AH24h_SetBlockSize  ; AH=24h limits block size if necessary
+    call    AH24h_SetBlockSize  ; AH=24h limits block size if necessary
+    jmp     SHORT .Enable8bitPioMode
 
 .SetMemoryMappedMode:
@@ -120 +121 @@
 .Set8bitPioMode:
     mov     BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_PIO8
+    ; Fall to .Enable8bitPioMode
+    
+    ; We always need to enable 8-bit mode since 16-bit mode is restored
+    ; when controller is reset (AH=0h or Dh)
 .Enable8bitPioMode: 
     jmp     AH23h_Enable8bitPioMode