Changeset 594 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization

Timestamp:

Jul 4, 2018, 6:40:02 PM (6 years ago)

Author:

Tomi Tilli

Message:

Previosly committed flash fix for configurator was incomplete. Now fixed properly.
Added MODULE_MFM_COMPATIBILITY.

Location:

trunk/XTIDE_Universal_BIOS/Src/Initialization

Files:

• DetectDrives.asm (modified) (2 diffs)
• Interrupts.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectDrives.asm

@@ -115 +115 @@
         test    al, al
         jnz     SHORT .ContinueInitialization   ; CMOS byte 12h is ready for Windows 95
-        call    CMOS_Verify10hTo2Dh
+        call    CMOS_Verify10hTo2Dh             ; Can we modify CMOS?
         jnz     SHORT .ClearBdaDriveCount       ; Unsupported BIOS, use plan B
     
@@ -123 +123 @@
         call    CMOS_WriteALtoIndexInDL
         call    CMOS_StoreNewChecksumFor10hto2Dh
-    %endif
+.ClearBdaDriveCount:
+    %endif  ; MODULE_WIN95_CMOS_HACK
 
     test    BYTE [cs:ROMVARS.wFlags], FLG_ROMVARS_IGNORE_MOTHERBOARD_DRIVES
     jz      SHORT .ContinueInitialization
-.ClearBdaDriveCount:
     mov     BYTE [es:BDA.bHDCount], 0   ; Set hard disk count to zero
 .ContinueInitialization:

trunk/XTIDE_Universal_BIOS/Src/Initialization/Interrupts.asm

@@ -59 +59 @@
 ;--------------------------------------------------------------------
 .InitializeInt13hAnd40h:
+%ifdef MODULE_MFM_COMPATIBILITY
+    mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4+2]; Load old INT 13h segment
+    mov     [RAMVARS.fpMFMint13h+2], ax         ; Store old INT 13h segment
+    xchg    dx, ax
+    mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4]  ; Load old INT 13h offset
+    mov     [RAMVARS.fpMFMint13h], ax           ; Store old INT 13h offset
+    
+    mov     [RAMVARS.fpOldI13h+2], cs
+    mov     WORD [RAMVARS.fpOldI13h], Int13hMFMcompatibilityHandler 
+%else
     mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4+2]; Load old INT 13h segment
     mov     [RAMVARS.fpOldI13h+2], ax           ; Store old INT 13h segment
@@ -64 +74 @@
     mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4]  ; Load old INT 13h offset
     mov     [RAMVARS.fpOldI13h], ax             ; Store old INT 13h offset
+%endif
 
     ; Only store INT 13h handler to 40h if 40h is not already installed.