One day I found a Commodore 64 outside. Luckily, it was not broken (only 2 keys are missing from the keyboard). I took it home and found a way to power it up and get a video and audio from it. This video shows all the connected hardware and used software, also demonstrates how a game can be run using a laptop, bypassing the need for cassette recorder. I also had no other accessories such a power supply or joystick so I had to overcome this. Normally, you connect the original C64 tape recorder into the C64 cassette port and you can play (load) tapes directly to C64. But if you don't have the original C64 tape recorder, you can use any other audio player (PC, laptop, CD player...) only if you convert the signal by using so called "tape converter" circuit - see below. Power supplies: - 9V AC 1A - a PCB salvaged from old VHS recorder, where I used only 1 of 4 secondary transformer windings - 5V DC 1,7A - ATX PSU (I didn't have any other transformer capable of 1,7A output) Video: - an USB video capture device connected to the C64 composite video output Audio: - a jack 3,5" connected to C64 audio output (audio chip is broken in my C64 so I didn't connect speakers to it but the loading sounds you can hear are coming from my laptop which is outputting audio signal both to speakers and to tape converter through headphone splitter) Tape converter: - it's the white breadboard with LED, connected to C64 cassette port on the right side and taking input from my laptop audio jack 3,5" on the left side - circuit is from http://www.bartvenneker.nl/index.php?... the one with 2 opamps - I used LM358N instead of LM324, maybe that's why I had to turn both the pots into their rightmost positions to get strong enough signal to be recognized by the 4049 chip as 1s and 0s - the LED is on by default and off when data loading should be paused (that's where I click Pause button in Audiotap) - when "FOUND ARKANOID" is displayed, LED goes off, then I pause data loading, press spacebar, LED goes on and screen goes blue - now it's time to unpause data loading in Audiotap and wait until it finishes Software: - .tap file is downloaded from somewhere (there are plenty of sites hosting these files), this is an image of a real tape - Audiotap is used to play .tap file from PC to tape converter (and from there to C64) If you want to do the same, there are couple of things to keep in mind: - audio output from PC is mono and it should stay that way - disable any effects from your audio device drivers and connect only left channel from laptop to tape converter - disable any windows sounds or any other notification sounds in your PC that you may use, they will cause the loading to fail (of course, also stop any music) Note: there is a cut in the video at start of loading because I wanted to film also the breadboard LED when C64 wrote "FOUND ARKANOID" but I was not fast enough and the loading screen was gone, had to start over.
Commodore 64 loading game from laptop via tape interface - YouTube |
| 19 Likes | 19 Dislikes |
| 1,215 views views | 109 followers |
| Science & Technology | Upload TimePublished on 13 Aug 2016 |
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