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#1
February 13th, 2007, 01:44 PM
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Commodore 64 Help
Hello, i recently purchased a Commodore 64 off of Craigslist.com. The unit appeared to be in good shape and had all the parts but the seller never mentioned if it worked or not. The unit powers on and has (what i believe is a video RCA connection?) but i cannot display video. The only thing the unit is missing is a manual so perhaps i am doing something wrong. Any help would be greatly appreciated, i'd hate to find out that i dropped 30 bucks on a dud
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#2
February 13th, 2007, 02:33 PM
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The video isn't RCA, unfortunately. You need to buy a video cable to plug into the 8-pin DIN port on the back of the machine to provide you with a video signal, or find an RCA-to-coax cable to hook up the RCA jack output to a TV input jack.
__________________
Sparcstation 20 - dual 180 MHz Ross HyperSparc processors - NetBSD 3.0 - 192 MB RAM UltraSparc 1/170E - Debian etch - 640 MB RAM VAXStation 4000/60 - OpenBSD 4.0 - 32 MB RAM IBM PS/ValuPoint 486sx25 - Debian etch - 32 MB RAM Commodore 128 - 2 MHz 8510, 4 MHz Z80 - 640 KB RAM Commodore 64 - 1 MHz 6510 - 64KB RAM Commodore VIC-20 - 1 MHz 6502 - 32KB RAM Two other VAXen that I haven't yet deployed 
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#3
February 13th, 2007, 02:58 PM
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where would i go about finding these, you think radio shack would have them?
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#4
February 13th, 2007, 03:01 PM
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by RCA-to-coax do you mean an RF modulator? if so i could get one of those anywhere.
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#5
February 13th, 2007, 04:07 PM
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No, you don't need an RF modulator.
The signal at the RCA jack of the C64 is already RF modulated. If you run a cable from it to your TV's antenna jack and tune the TV to channel 3 or 4, you should get a picture. (I use a cable with RCA male on both ends, and an adapter: "F" male to RCA female) One of the other jacks is for monitor video, but that's the one that needs a special cable. Maybe this will help: http://www.zimmers.net/anonftp/pub/c...4-r1.chips.gif Andy
__________________
Co-founder of MARCH (Mid-Atlantic Retro Computing Hobbyists). Visit the Sony SMC-70 FAQ. I need a real cable for an Apple Duodisk.
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#6
February 13th, 2007, 09:13 PM
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ok so i went to radio shack and bought the RCA-to-Coax. It works, is there suppost to be sound, or how can i test it. i dont have any cart's or any thing so is there anything on the c64 stock to be able to mess around with?
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#7
February 13th, 2007, 09:52 PM
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http://www.lemon64.com/manual/
There's a sample sound program in Chapter 8.
__________________
Co-founder of MARCH (Mid-Atlantic Retro Computing Hobbyists). Visit the Sony SMC-70 FAQ. I need a real cable for an Apple Duodisk.
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#8
February 14th, 2007, 12:29 AM
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Quickest way to test for sound:
POKE 54296,15:POKE 54278,240:POKE 54273,100:POKE 54276,33 (max volume, full sustain ADSR, medium pitched note, sawtooth waveform) Turn it off with POKE 54296,0 or hit RUN/STOP + RESTORE. The manual example is good too, but a bit long to type in just to test if the sound chip is OK or not.
__________________
Anders Carlsson "So much by thus has never been due much if a reduced number." - Babelfish mangled quote
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#10
February 14th, 2007, 09:16 PM
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ok so i tested these things but they didnt work, i dunno if that means its faulty or if im not using the proper connection, if i have the rca-to-coax should that be producing noise or do i have to use another cable separately?
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