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efitest3
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it works! (on some machines, let's investigate further)
[efitest3]
/
efitest.asm
diff --git
a/efitest.asm
b/efitest.asm
index
333b095
..
0feb61d
100644
(file)
--- a/
efitest.asm
+++ b/
efitest.asm
@@
-142,13
+142,39
@@
start16:
mov ax, 13h
int 10h
mov ax, 13h
int 10h
+ ; setup palette
+ mov dx, 3c8h
+ xor al, al
+ out dx, al
+ inc dx
+ xor cl, cl
+.pal: mov al, cl
+ out dx, al
+ xor al, al
+ out dx, al
+ mov al, cl
+ not al
+ out dx, al
+ inc cl
+ jnz .pal
+
+ ; fill framebuffer with xor pattern
mov ax, 0a000h
mov es, ax
xor di, di
mov ax, 0a000h
mov es, ax
xor di, di
- mov cx, 32000
- mov ax, 6767h
- rep stosw
-
+ xor cx, cx
+.yloop: xor dx, dx
+.xloop: mov ax, dx
+ xor ax, cx
+ stosb
+ inc dx
+ cmp dx, 320
+ jnz .xloop
+ inc cx
+ cmp cx, 200
+ jnz .yloop
+
+ ; halt for ever
.hang: hlt
jmp .hang
.hang: hlt
jmp .hang