43 lines
1.2 KiB
Forth
43 lines
1.2 KiB
Forth
# Experimental Mu shell
|
|
# A Lisp with indent-sensitivity and infix, no macros. Commas are ignored.
|
|
|
|
fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
|
|
var sandbox-storage: sandbox
|
|
var sandbox/esi: (addr sandbox) <- address sandbox-storage
|
|
initialize-sandbox sandbox
|
|
load-sandbox data-disk, sandbox
|
|
var width/eax: int <- copy 0
|
|
var height/ecx: int <- copy 0
|
|
width, height <- screen-size screen
|
|
{
|
|
render-sandbox screen, sandbox, 2/x, 2/y, width, height
|
|
{
|
|
var key/eax: byte <- read-key keyboard
|
|
compare key, 0
|
|
loop-if-=
|
|
# no way to quit right now; just reboot
|
|
edit-sandbox sandbox, key
|
|
}
|
|
loop
|
|
}
|
|
}
|
|
|
|
# Read a null-terminated sequence of keys from disk and load them into
|
|
# sandbox.
|
|
fn load-sandbox data-disk: (addr disk), _self: (addr sandbox) {
|
|
var self/esi: (addr sandbox) <- copy _self
|
|
var s-storage: (stream byte 0x200)
|
|
var s/ebx: (addr stream byte) <- address s-storage
|
|
load-sector data-disk, 0/lba, s
|
|
{
|
|
var done?/eax: boolean <- stream-empty? s
|
|
compare done?, 0/false
|
|
break-if-!=
|
|
var key/eax: byte <- read-byte s
|
|
compare key, 0/null
|
|
break-if-=
|
|
edit-sandbox self, key
|
|
loop
|
|
}
|
|
}
|