Changeset 437 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src

Timestamp:

Aug 10, 2012, 5:35:08 PM (12 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Changed Fast XTIDE to Lo-tech XT-CF
• 8-bit PIO Transfer mode is enabled for Lo-tech XT-CF

Location:

trunk/XTIDE_Universal_BIOS/Src

Files:

• Device/IDE/IdeCommand.asm (modified) (1 diff)
• Handlers/Int13h/AH9h_HInit.asm (modified) (2 diffs)

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

@@ -86 +86 @@
     call    Idepack_FakeToSSBP
 
+    ; Enable 8-bit PIO mode for Lo-tech XT-CF
+    call    AH9h_Enable8bitPioModeForXTCF
+
     ; Prepare to output Identify Device command
     mov     dl, 1                       ; Sector count (required by IdeTransfer.asm)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH9h_HInit.asm

@@ -125 +125 @@
     STORE_ERROR_FLAG_TO_DPT     FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS
 .SkipInitializeDeviceParameters:
+
+
+;;; Enable 8-bit PIO Transfer Mode for Lo-tech XT-CF (CF and Microdrives only)
+    call    AH9h_Enable8bitPioModeForXTCF
+    STORE_ERROR_FLAG_TO_DPT     FLG_INITERROR_FAILED_TO_ENABLE_8BIT_PIO_MODE
 
 
@@ -248 +253 @@
 .NoErrorFlagToSet:
     ret
+
+
+;--------------------------------------------------------------------
+; AH9h_Enable8bitPioModeForXTCF
+;   Parameters:
+;       DS:DI:  Ptr to DPT
+;   Returns:
+;       AH:     Int 13h return status
+;       CF:     0 if successful, 1 if error
+;   Corrupts registers:
+;       AL, BX, CX, DX
+;--------------------------------------------------------------------
+AH9h_Enable8bitPioModeForXTCF:
+    eMOVZX  bx, BYTE [di+DPT.bIdevarsOffset]
+    cmp     BYTE [cs:bx+IDEVARS.bDevice], DEVICE_8BIT_XTCF
+    je      SHORT .Enable8bitMode
+    xor     ah, ah      ; Do nothing for this device
+    ret
+.Enable8bitMode:
+    mov     si, FEATURE_ENABLE_8BIT_PIO_TRANSFER_MODE
+    jmp     AH23h_SetControllerFeatures