X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=ld45_start_nothing;a=blobdiff_plain;f=src%2Fkeyb.asm;h=b953474240785f3840f0b86f45f084c5cc719454;hp=d9fdd4eb8e41f75f889e6d341adba3ed73096aee;hb=033d820931e5930051b9df6a0c4a8183aa9299ee;hpb=e89f229506bcd5962dc6a7a6a07e5aab2fa7f7c5

diff --git a/src/keyb.asm b/src/keyb.asm
index d9fdd4e..b953474 100644
--- a/src/keyb.asm
+++ b/src/keyb.asm
@@ -41,15 +41,11 @@ kbintr:
 	and bl, 07fh
 	add ebx, keystate
 
-	; determine if it's a press or release
-	test al, 80h
-	jz .press
-	; key release
-	mov byte [ebx], 0
-	jmp .eoi
-.press: ; key press
-	mov byte [ebx], 1
-
+	; determine if it's a press or release (high bit set on release)
+	rol al, 1
+	and al, 1
+	xor al, 1
+	mov byte [ebx], al
 .eoi:
 	cli
 	end_of_irq KB_IRQ