DavidMil Posted February 6, 2019 Share Posted February 6, 2019 Does anyone have a modification to add Composite Chrominance to pin 5 of a 600XL? I'm not interested in any other types of video upgrades for the 600XL (boards, chips, etc.). Just a Composite Chrominance to pin 5 upgrade. Suggestions would be appreciated. Thank you all, DavidMil Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted February 6, 2019 Share Posted February 6, 2019 see image! 5 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted February 6, 2019 Share Posted February 6, 2019 (edited) This is a working hack, but it is best to use notch filter to pass to composite from both sides. then you have decently clean signals on all three outputs. or you can always choose one of the add on boards for video floating around out there... at the least you could put a switch in this hack to allow chrominance to be added to or denied to composite or not, limiting the bleed over. Edited February 6, 2019 by _The Doctor__ 1 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 7, 2019 Author Share Posted February 7, 2019 xrbrevin, This must be for a PAL machine. My American 600XL doesn't have Q7, Q8, Q9, nor any of the supporting components. There is no L12 or R124 on my board either, just empty locations there too. DavidMil Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted February 7, 2019 Share Posted February 7, 2019 There is no DIN connector, either. Are you adding one? We can give better advice if you explain what you are doing. Bob Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 8, 2019 Author Share Posted February 8, 2019 (edited) There is a DIN connector on my 600XL. I know, I put it there. Pictures are better than words so have a look... This is the machine that was lost in the attic for many years. I had started to do another upgrade and it wouldn't work, so I got disgusted and sent it to the attic. I found it the other day and after playing with it a bit, I decided to do it a different way. It looks good but I'd like to add chrominance to pin 5 to see if that would make it any better. Right now it's a little bit 'grainy'. Edited February 8, 2019 by DavidMil Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 8, 2019 Author Share Posted February 8, 2019 (edited) There is no DIN connector, either. Are you adding one? We can give better advice if you explain what you are doing. Bob There is a DIN connector on my 600XL. I know, I put it there. Pictures are better than words so have a look... This is the machine that was lost in the attic for many years. I had started to do another upgrade and it wouldn't work, so I got disgusted and sent it to the attic. I found it the other day and after playing with it a bit, I decided to do it a different way. It looks good but I'd like to add chrominance to pin 5 to see if that would make it any better. Right now it's a little bit 'grainy'. David Edited February 8, 2019 by DavidMil Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 8, 2019 Share Posted February 8, 2019 You do realise there are holes in the board for a DIN5 right behind the channel switch? If you removed the switch you could have fitted the DIN without all the drilling and jumpering. 1 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 8, 2019 Author Share Posted February 8, 2019 Yes I do know about the holes. But I wanted to keep the channel selector switch. This location only caused me to cut two traces and forced me to relocate a cap. David Quote Link to comment Share on other sites More sharing options...
Gunstar Posted February 9, 2019 Share Posted February 9, 2019 (edited) The channel selector switch is a handy switch to keep for other things, even if you do remove the RF, I use it on my 1200XL to turn on/off composite signal for cleaner chroma/luma output, but didn't want to get rid of composite all together just in case. Though at the time I didn't think about just combining the chroma/luma back to composite outside the computer with a S-video-to-composite RCA in-line adapter, which works even better than the internal composite...so I will probably end up re-purposing it for something else (PAL computer so I don't use composite for artifacting anyway). On the 800XL I'm rebuilding I'm going to use the switch for the Antix board. Edited February 9, 2019 by Gunstar Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 9, 2019 Share Posted February 9, 2019 If it were a choice between the channel switch and a monitor jack, I think I'd go for the latter every time, but yes: the switch can be useful on other machines. 2 Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted February 9, 2019 Share Posted February 9, 2019 I just use the COMPOSITE signal for CHROMA if I want s-video on an 800XL or 1200XL. Bob 2 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 10, 2019 Author Share Posted February 10, 2019 I'll give it a try. Thanks, David Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.