27 lines
897 B
Forth
27 lines
897 B
Forth
." powerpc-ofw-boot : Booting through OpenFirmware..." cr
|
|
\ storing 0xBE for beige, 0x5A for mac99
|
|
\ cannot use superior, inferior, different symbols (bootinfo.txt)
|
|
: sup - dup abs = ;
|
|
: inf dup sup 1 + ;
|
|
: diff = if 0 else -1 then ;
|
|
: fba frame-buffer-adr ;
|
|
: beige-vram 80000000 ; : mac99-vram 81000000 ;
|
|
: hardware-error ." Hardware not supported." ;
|
|
|
|
fba beige-vram = if ." Beige hardware detected" cr 0BE beige-vram c! then
|
|
fba mac99-vram = if ." mac99 hardware detected" cr 05A mac99-vram c! then
|
|
|
|
fba beige-vram = if screen-width 4 beige-vram + l! then
|
|
fba beige-vram = if screen-height 8 beige-vram + l! then
|
|
|
|
fba mac99-vram = if screen-width 4 mac99-vram + l! then
|
|
fba mac99-vram = if screen-height 8 mac99-vram + l! then
|
|
|
|
variable run
|
|
-1 run !
|
|
fba beige-vram diff fba mac99-vram diff and if hardware-error cr 0 run ! then
|
|
run @ 0 = if 1 0 do 0 +loop then
|
|
boot hd:,\boot\kernel.elf
|
|
|
|
|