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About damanloox

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    Chopper Commander

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    Ireland (and Poland - from time to time)

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  1. I've tested this issue (just thought I need to get some value form my oscilloscope from time to time ;)) and in three cases (ie. three Ataris I used for testing) 4050 generates TTL level CSYNC. That means we need 470 Ohm resistor to provide "SCART" level output (ie. 75 Ohm). That's what I'm doing on my new "daughter board" and it works perfectly fine. "Resistor kit" for VBXE is not really necessary as most people will take CSYNC from composite video anyway (which is already "SCART" compliant). The only "issue" is with CSYNC coming directly from 4050 because it's TTL level (and even though some TVs can deal with that I'd still recommend putting 470 Ohm resistor). I BTW - I sincerely hope FJC doesn't die for at least next several decades and outlives us all
  2. So my DIN13 breakout board (for VBXE) has finally arrived from China so I soldered the components and installed/tested XE version. Works perfectly and I can now output RGB to a TV via SCART as well as monitor (via custom DIN13 to VGA cable). There's not much difference when it comes to picture quality (ie. CSYNC coming from composite or going via LM1881 - I have UAV so perhaps composite is cleaner than stock) but the main goal was to have both CSYNC and VSYNC available as well as proper signal levels (ie. SCART level for SCART and TTL for VGA or monitors that need TTL). Anyway - will post gerbers soon (but be aware these components are rather small so making the board will not be easy for everyone).
  3. Actually - while we're at it - @Mr Robot would you consider making SIDE2 and SIDE3 replacement cases (so they fit 1200XL)...? Original SIDE2 needs filing in order to fit and SIDE3 needs significant force so replacement cases that actually _fit_ would be great IMHO.
  4. Even though my SysCheck doesn't exactly fit in the case (not Steve's fault and I'll be getting correct one anyway) but the quality is really great to the last detail. It even has brass (or some sort of other metal) inserts for screws! Honestly - if you have hardware that Steve makes cases for - just buy it.
  5. I will post the photos but: - this is not "standalone" product. You'll need VBXE first. - not sure if my phone is capable of showing actual quality - last time I tried it was not even close to real life - but I'll try. Perhaps with better lights. - I'm not selling these. I'll probably make Gerbers available so people can make them if they wish. I may have a few left after I upgrade all my stuff and would probably sell them at parts price but I'm not sure howany will be left and how much the parts actually cost (I went through a few "revisions" and lost track of actual cost :)))
  6. OK, here's next iteration of my DIN13 "board". Now with sync separator providing CSYNC and VSYNC. Input can come from either Composite or CD4050 pin 15. Output can be either SCART or TTL. I'd say most monitors and TVs are covered.... Picture quality is better compared to sync coming from Composite and at least as good as coming directly from CD4050 (the advantage is that you can have SCART output level regardless of source sync so no more tinkering with resistors). Note - this is a "pre-production" version hence a few "optional" components and jumpers. All hand soldered so looks rather bad (these resistors/caps are 0805 and I was in a hurry before next Euro 2020 match ;)). Production will probably hit whooping 10 units when the design is finalised and Chinese factory delivers the goods Also note - this is not a commercial project - all done for my own... needs and fun.
  7. If anybody who has pre-2019 SysCheck Standard (ie. no unpopulated space for CR batter holder at the back) wants a case (by Steve @therobotfactory.net) - I have one. Doesn't fit my "newer" version of SysCheck and Steve offered new one. Money from the sale (less shipping..) will go straight back to Steve. Case is brand new, not used or tinkered with. I'm in Ireland - postage to EU shouldn't be expensive.
  8. Thanks, that's what I suspected... As for piggybacking - I don't have space for that and I don't like it (in general). It'll be a good "test" for my DIN13 board (now with sync separator).
  9. Does anybody know if UAV provides CSYNC out on pin 15 (when installed in place of CD4050)?
  10. OK, problem solved. That purple patch cable got detached from 74LS08 (red circle on the picture). I soldered it back and everything is working perfectly now. Anyway - the board is now recapped, socketed (where I plan to put upgrades ie. U1MB, VBXE and PokeyMax) and I think I'll put sockets under all RAM chips (because what else would I be doing on Sunday morning BTW - those spots of flux here and there will be cleaned (just wanted to mention before the purists start screaming at me ) Thanks for all help.
  11. And there's no difference when I set SysCheck dip3 to off/on/off...
  12. As for desoldering (caps, ICUs etc) - I've seen people damaging pads and traces by pushing desoldering gun into motherboard. Don't do that. Lightly touch the board, wait half a second and wiggle around for another second while sucking the solder. Also - add some fresh solder to each point before desoldering. 99% of components will fall off without any force when using desoldering gun properly. Some components have their legs bent - in which case the technique of pulling the component while heating it has to be used..
  13. Yes, video is corrupted (which is clearly seen with SysCheck - it's not a bad photo, it's exactly what is on the screen)
  14. @Nezgar SysCheck provides 64k of ram and disables onboard Ram by default (IE dip3 set to on on off). @Paul Westphal no MT memory on board. Wouldn't SysCheck work if memory was bad? I mean it sort-of works but the screen is not what it should be. Btw - when booting in composite the screen is red and not blue...
  15. I desperately need help with my 130XE that I took out of the drawer (with the intention of upgrading). Long story short - it doesn't work... One of the two screens attached ("empty" blue screen) is what it does on s-video. The other one is with SysCheck inserted (it sort-of starts but it's not what I'd expect to see)... Any ideas...? I replaced OS ROM, Antic and MMU - same result every time...
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