29 lines
683 B
Forth
29 lines
683 B
Forth
# Test out the video mode by filling in the screen with pixels.
|
|
#
|
|
# To build a disk image:
|
|
# ./translate ex2.mu # emits code.img
|
|
# To run:
|
|
# qemu-system-i386 code.img
|
|
# Or:
|
|
# bochs -f bochsrc # bochsrc loads code.img
|
|
|
|
fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
|
|
var y/eax: int <- copy 0
|
|
{
|
|
compare y, 0x300/screen-height=768
|
|
break-if->=
|
|
var x/edx: int <- copy 0
|
|
{
|
|
compare x, 0x400/screen-width=1024
|
|
break-if->=
|
|
var color/ecx: int <- copy x
|
|
color <- and 0xff
|
|
pixel-on-real-screen x, y, color
|
|
x <- increment
|
|
loop
|
|
}
|
|
y <- increment
|
|
loop
|
|
}
|
|
}
|