Changeset 524 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization

Timestamp:

Mar 14, 2013, 2:28:30 PM (11 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Min time to display hotkeys finally work correctly.
• AT builds do not copy existing INT 13h handler to 40h by default, XT builds do.
• Interrupts are enabled for Primary and Secondary controller by default on AT builds.

Location:

trunk/XTIDE_Universal_BIOS/Src/Initialization

Files:

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

trunk/XTIDE_Universal_BIOS/Src/Initialization/FloppyDrive.asm

@@ -22 +22 @@
 SECTION .text
 
+%ifdef COPY_13H_HANDLER_TO_40H
 ;--------------------------------------------------------------------
 ; Checks is floppy drive handler installed to interrupt vector 40h.
@@ -103 +104 @@
 %endif
 
+%endif ; COPY_13H_HANDLER_TO_40H
+
 
 ;--------------------------------------------------------------------

trunk/XTIDE_Universal_BIOS/Src/Initialization/Interrupts.asm

@@ -64 +64 @@
     mov     [RAMVARS.fpOldI13h], ax             ; Store old INT 13h offset
 
-    ; NOTE! Installing INT 40h handler is currently uncommented to test
-    ; if it is really needed. I suspect that it is not. Many bytes can be
-    ; saved if INT 40h related code can be removed.
-%if 0
-
+%ifdef COPY_13H_HANDLER_TO_40H
     ; Only store INT 13h handler to 40h if 40h is not already installed.
     ; At least AMI BIOS for 286 stores 40h handler by itself and calls
@@ -77 +73 @@
     mov     [es:BIOS_DISKETTE_INTERRUPT_40h*4+2], dx    ; Store old INT 13h segment
 .Int40hAlreadyInstalled:
-%endif ; 0
+%endif ; COPY_13H_HANDLER_TO_40H
 
     mov     al, BIOS_DISK_INTERRUPT_13h         ; INT 13h interrupt vector offset