Thread: Zx81
View Single Post
Old 21st Apr 2020, 6:13 pm   #259
John Earland
Hexode
 
Join Date: May 2013
Location: Middlesbrough, North Yorkshire, UK.
Posts: 442
Default Re: Zx81

Thank you but I’m not out of the woods!
Okay so I put in the replacement ULA and I got a picture! It was very fuzzy and grainy with very thin strips/horizontal lines-and was flashing colour so I fiddled with the switches on the ULA which stopped the flashing and in some configuration stopped the picture i.e. the cursor disappeared. So I guessed it might be something to do with the RF mod I did-so I’ve taken it out and restored it (all in the picture). Sadly, now I can’t get anything at all. I’ve checked the 5v and video connections into the module and there is a good connection between going in and through the components. So I’m thinking of putting the mod back in but not sure where to go from there. It’s highly likely of course that my first time socket soldering has not been a success!
Attached Thumbnails
Click image for larger version

Name:	4B4DAFF7-6F7D-4F32-A1DB-5E57C9756329.jpg
Views:	39
Size:	85.8 KB
ID:	203652  
John Earland is offline