Changeset 584 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH23h_HFeatures.asm

Timestamp:

Apr 25, 2015, 7:17:41 PM (9 years ago)

Author:

aitotat

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• Added support for Lo-tech 8-bit IDE Adapter (untested)

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH23h_HFeatures.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH23h_HFeatures.asm

@@ -78 +78 @@
 ;--------------------------------------------------------------------
 ; AH23h_Enable8bitPioMode
+; AH23h_Disable8bitPioMode
 ;   Parameters:
 ;       DS:DI:  Ptr to DPT (in RAMVARS segment)
@@ -91 +92 @@
     mov     si, FEATURE_ENABLE_8BIT_PIO_TRANSFER_MODE
     jmp     SHORT AH23h_SetControllerFeatures
+AH23h_Disable8bitPioMode:
+    mov     si, FEATURE_DISABLE_8BIT_PIO_TRANSFER_MODE
+    call    AH23h_SetControllerFeatures
+    xor     ah, ah          ; Clear error since modern drives might not understand the command and are
+    ret                     ; always in 16-bit mode anyway
 %endif