External command patch

It seems that INT13 doesn't always keep ES and BX intact. I have accomodated for that in this commit. Signed-off-by: Nkeck720 <noahkeck72@gmail.com>
nkeck720 · Jan 13, 2017 · 0a978a0 · 0a978a0
1 parent d499f0f
commit 0a978a0
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/kernel.asm b/src/kernel.asm
@@ -586,6 +586,8 @@ external_command:
 	;; or the file was not found.
 	jc  bad_prog_file
 	;; Now check for a flat or segmented program
+	mov bx, 4000h
+	mov es, bx
 	pop ds			; We get this back now
 	mov ah, byte ptr es:bx
 	cmp ah, "F"