24 lines
881 B
Forth
24 lines
881 B
Forth
# Load an image from disk and display it on screen.
|
|
#
|
|
# Build the code disk:
|
|
# $ ./translate apps/ex13.mu # generates code.img
|
|
# Load a pbm, pgm or ppm image (no more than 255 levels) in the data disk
|
|
# $ dd if=/dev/zero of=data.img count=20160
|
|
# $ dd if=___ of=data.img conv=notrunc
|
|
# Run:
|
|
# $ qemu-system-i386 -hda code.img -hdb data.img
|
|
|
|
fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
|
|
var img-storage: image
|
|
var img/esi: (addr image) <- address img-storage
|
|
load-image img, data-disk
|
|
render-image screen, img, 0/x, 0/y, 0x300/width, 0x300/height
|
|
}
|
|
|
|
fn load-image self: (addr image), data-disk: (addr disk) {
|
|
var s-storage: (stream byte 0x200000) # 512 * 0x1000 sectors
|
|
var s/ebx: (addr stream byte) <- address s-storage
|
|
load-sectors data-disk, 0/lba, 0x1000/sectors, s
|
|
initialize-image self, s
|
|
}
|