OK, I got that slightly wrong. Mat's composite adapter was specifically for non-CRTC PET's which generate a positive h-sync, which is therefore what his board expects, so I inverted it on the board using the jumper. Depending on what composite solution you use, this may not be necessary. On 18/08/2016 00:11, Rob Clarke wrote: > > IIRC, you need to invert the h-sync signal and the video signal as > well to display on composite. There is a jumper somewhere on the 8032 > board that will allow you to invert h-sync but I used a CRTC register > to invert the video signal. > > I know I've done it on an 8032 to a cheapo LCD composite with one of > Mat D'Asaro's boards, the jumper on the board, plus a kernal to invert > the video-on signal and set the timing somewhere close to PAL. > > cheers, > > Rob > > > > On 17/08/2016 15:58, Steve Gray wrote: >> The 8032's video output is at 20kHz which is not very standard. >> Luckily you can modify the CRTC registers and play with the timing. >> The best option is to change it to ~15kHz to match NTSC or PAL >> timing. At that point you can use a simple one-chip circuit to >> generate composite video ($2). You could also build something like my >> ColourPET circuit to generate RGBI or RGB analog for a Commodore 108x >> Monitor, or to a SCART TV (not all), or to a GBS82xx converter (video >> scaler) ($25) to get VGA, or to a SCART to HDMI adapter (video >> scaler) ($30). >> >> It's been on my to-do list for a long time to try the GBS adapter (I >> have one) and the SCART to HDMI (also have one). Someone else here >> successfully connected the PET to a GBS adapter. It's just a matter >> of tweeking the timing and the signal voltages. >> >> Steve >> >> >> ------------------------------------------------------------------------ >> *From:* Didier Derny <email@example.com> >> *To:* firstname.lastname@example.org >> *Sent:* Wednesday, August 17, 2016 7:40 AM >> *Subject:* connecting a commodore 8032 motherboard to modern screen >> >> Hi >> >> any idea on how I can connect a commodore 8032 motherboard to a modern >> screen ? >> >> thanks >> >> -- >> didier >> >> >> >> Message was sent through the cbm-hackers mailing list >> >> > Message was sent through the cbm-hackers mailing listReceived on 2016-08-17 23:01:03
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