Re: C64 cry for help

From: Carlsson, Anders (dal95acn_at_mds.mdh.se)
Date: 1998-12-04 00:30:33

Marko sent to the cbm-hackers list:

> Since I don't know the connections of the 1802 monitor, I'm forwarding
> your question to the cbm-hackers mailing list, where somebody probably can
> give you a detailed answer.

> AUDIO (AUDIO OUT on the C64), VIDEO or COMPOSITE VIDEO and GROUND or GND. 
> If the DIN connector also has the middle contact, you could replace
> composite video with LUMINANCE (black and white picture; this could be
> called COMPOSITE SYNC on the monitor) and CHROMA (the colour signal). 

The 1802 monitor (which I have one of, unfortunately malfunctioning) indeed
have three different inputs on the rear:

monochrome (renders a greenish display), composite video and separate video
(which is split in chroma and luma).

The composite and separate video inputs have their own audio inputs, but
the monochrome input shares the audio with composite video. There should
be a switch under the panel at the front to change input source.

> The type of the cable isn't so important; the video signal bandwidth is in
> the order of 10-20 MHz.  I've used audio cable without problems.

Me too. Although my C64 video cable came with the monitor, I created my own
composite video cable for my VIC-20, using an old DIN-to-DIN audio cable and
put the RCA connectors required in one end.

/Anders Carlsson - will some day check for that bad solder joint on the PCB

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