Workaround for MS-DOS strange handling of interrupts.

2026-03-01 09:41:15 +00:00 · 2025-02-16 19:49:13 -08:00
parent 90fd560c72
commit d7f6374269
2 changed files with 110 additions and 111 deletions
--- a/XTMax/Drivers/BootROM/bootrom.asm
+++ b/XTMax/Drivers/BootROM/bootrom.asm
@@ -83,7 +83,6 @@ entry:
    push ax
    push cx
    push dx
-    push si
    cli
 %endif

@@ -202,7 +201,6 @@ entry:

 .skip:
    sti
-    pop si
    pop dx
    pop cx
    pop ax
@@ -389,6 +387,7 @@ int13h_entry:
 .return_with_flags:
    pop TEMP1
    pop TEMP0
+    sti                         ; workaround - MS-DOS does not properly propagate IF
 %ifdef EXTRA_DEBUG
    call dump_regs
 %endif