can now modify frame buffer

Makefile

@@ -1,6 +1,6 @@
 PPC=powerpc-linux-gnu
 DISK.APM: kernel.elf bootinfo.txt kpartx.sh
-	dd bs=8M count=2 if=/dev/zero of=DISK.APM
+	dd bs=512K count=2 if=/dev/zero of=DISK.APM
 	parted DISK.APM --script mklabel mac mkpart primary hfs+ 32.8KB 100%
 	sudo chmod +x kpartx.sh
 	sudo ./kpartx.sh
@@ -14,11 +14,17 @@ bootinfo.txt: load.fs
 	echo "<chrp-boot><boot-script>" >> bootinfo.txt
 	cat load.fs >> bootinfo.txt
 	echo "</boot-script></chrp-boot>" >> bootinfo.txt
-kernel.elf: boot.elf boot1.elf
+kernel.elf: boot.elf boot1.elf 
 	$(PPC)-ld -Ttext=0x200000 boot.elf boot1.elf -o kernel.elf
 boot1.elf: boot.c
 	$(PPC)-gcc -c boot.c -o boot1.elf
 boot.elf: boot.S
 	$(PPC)-as -c boot.S -o boot.elf
 clean:
-	rm DISK.APM *elf *txt
+	rm DISK.APM *elf *txt 
+run:
+	qemu-system-ppc DISK.APM
+debug:
+	qemu-system-ppc DISK.APM -d in_asm
+all:
+	make clean && make && make run

boot.S

@@ -1,4 +1,4 @@
 .globl _start
 _start:
 addi 1,1,1
-b begin
+b begin 

boot.c

@@ -1,4 +1,11 @@
 void begin(void)
 {
-	for(;;){};
+	unsigned char* addr = 0x7FFFFFFF;
+	unsigned char* noise = 0xFFEE0000;
+	while (addr < 0x80500000){
+		*addr = *noise;
+		addr++;
+		noise++;
+	}
+	for(;;);
 }

load.fs

@@ -1,7 +1,6 @@
-12
-12
-*
-.
 ." Booting through OpenFirmware..." cr
-." Loading: hd:,\boot\kernel.elf" cr
+frame-buffer-adr
+.
+: rep dup 0 do i . loop ;
+500 rep
 boot hd:,\boot\kernel.elf