commodore 64

[YEK]

my friends an i found what looks like a new packed commodore 64 in a local thrift store

 

there's no monitor but a keyboard and some programs.

 

is it worth anything?

[kaini]

not worth a huge amount, but you now have a MOS6581 chip at your disposal, and that is a soundchip that was ahead of its time.

 

http://en.wikipedia.org/wiki/MOS6581

http://codebase64.org/doku.php?id=base:sid_programming

[YEK]

yeah i knew about that sound chip. i don't know how to hack shit though. it was all going for 5 bucks (canadian)

[kaini]

start here

 

5 S=54272
10 FOR L=S TO S+24:POKE L,0:NEXT: REM CLEAR SOUND CHIP
20 POKE S+5,9:POKE S+6,0
30 POKE S+24,15: REM SET MAXIMUM VOLUME LEVEL
40 READ HF,LF,DR
50 IF HF<0 THEN END
60 POKE S+1,HF:POKE S,LF
70 POKE S+4,33
80 FOR T=1 TO DR:NEXT
90 POKE S+4,32:FOR T=1 TO 50:NEXT
100 GOTO 40
110 DATA 25,177,250,28,214,250
120 DATA 25,177,250,25,177,250
130 DATA 25,177,125,28,214,125
140 DATA 32,94,750,25,177,250
150 DATA 28,214,250,19,63,250
160 DATA 19,63,250,19,63,250
170 DATA 21,154,63,24,63,63
180 DATA 25,177,250,24,63,125
190 DATA 19,63,250,-1,-1,-1

 

type this in

then start fucking with the values in lines 110-190

 

110 DATA 25,177,250,28,214,250

 

25 = start note (freq)

177 = end note (freq)

250 = duration (ms)

 

etc

 

the notes are not in Hz, mind you

 

experiment

[Guest Gary C]

Yes. Buy it and send it to me... Ah, nostalgia.