Dump BIOS ROM 100 data &hf5, &hdb, &h22, &he6, &h03, &hf5, &hf6, &h01 110 data &hd3, &h3c, &h3a, &h00, &h00, &h32, &h00, &h00 120 data &hf1, &hd3, &h3c, &hf1, &hc9 130 clear ,&hdfff 140 for a=&he000 to &he014 150 read d:poke a,d 160 next a 170 sum=0 180 for u=0 to &hf 190 print u 200 poke &he00c,&h40+u // 40,50,60,70 210 poke &he00f,&he1+u 220 for l=0 to &hff 230 poke &he00b,l 240 poke &he00e,l 250 a=&he000:call a 260 sum=sum+peek(&he100+u*256+l) 270 sum=sum and &hff 280 next l 290 next u 300 print sum Run to copy the bios image to $e100 bsave #-1,"name",&he100,&h100 Record the data recorder sound to wav file (48KHz/8bit/mono) Change &h40 in line.200 to &h50,&h60,&h70 and record again Convert each wav file to binary with wav2bin and convine them Dump BASIC ROM 100 data &hf5, &hdb, &h22, &he6, &h03, &hf5, &he6, &h02 200 poke &he00c,&h00+u // 00,10,20,30,40,50,60,70 Change &h00 in line.200 to &h10,&h20,&h30,&h40,&h50,&H60,&h70