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About shoestring

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    C64, Apple, A8 & Amiga junkie. Video game & electronic repairs, homebrew dev (arcade diagnostics software), guitar & music.

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  1. My utility only tests the first bank of 64k, it's on my to do list to write a version just for the 130XE but currently busy on another project.
  2. Try pin 7. In Analog RGB mode, H & V are n/c
  3. I have Csync going to pin 7 on my 1084S, analog RGB mode. No picture otherwise.
  4. It's much easier to swap the parts from this faulty XE into a known working machine until the working machine breaks, rather than swap good parts into a dead machine. The reason why this works better is that you might have multiple faults. So I'd be starting with the major chips first. Sally, GTIA, ANTIC, MMU, OS ROM then move on to DRAMs one by one, last but not least would be FREDDIE and other support logic. If you have a logic or RAM tester then it makes life a little bit easier.
  5. Yes. Check the membrane. I picked up a nice A1200 recently, unfortunately the membrane could not be saved. It looks to have suffered from a spill. My heart sank when I saw it but luckily the motherboard is OK and corrosion free. The PiStorm is a good alternative, an A1200 version is planned.
  6. Resistors can drift badly over time, usually upwards but can also drift down if exposed to lots of current and got very hot. Replace all of them, they're cheap anyway.
  7. Nice set up. At least yours still has the little front flap on the 1084. Mine disappeared years ago when I had my A500.. I wish I had not thrown it out when it broke. Those Amiga monitors are the best to be honest, still plenty of spare parts around to repair these things when they break, easy to maintain.
  8. The instructions recommend picking up cysnc from pin 15 of the hex buffer. The only issue I had with these instructions was where the signal ends up going to on the DB9, so I had to swap them around ( from pin 8 to pin 7 on the DB9 end, which maps to csync on the 1084S ). If you didn't have the issue before the svideo 2.1 mod then I would look at your grounding.
  9. Bumping an old thread but this might help someone else out. Csync is pin 7 on the 1084S-P1 ( Philips ), not sure about the Daewoo model that uses the same DB9 connector, they're Amiga spec monitors so they should both be the same. It's well worth getting RGB to work. Check the orientation of your cables. The PINS are orientated opposite to each other between the male and female end.. easy mistake to make when making these cables up at 3am in the morning. I had the top row reversed on one of the opposite ends
  10. Are gut shots permitted ? This after spending the better half of the afternoon and rest of the night carefully installing my U1Mb and VBXE. Now on to the RGB cable.
  11. Try living in Australia, where you have no choice but to import for most things Congrats on the Miggy
  12. The Antonia 4MB doesn't depend on any ram in the 600XL. Everything needed is on the CPU board itself. I would assume its the same for XEs but I haven't tried.
  13. You're welcome and thanks for your kind comments. I was working on improvements before I lost all my code in a HD crash. In it's current state, not much happens if the RAM chip is complete loss and the logic used for locating the faulty RAM chip isn't very reliable but at least you still get a display ( if RAM is the only fault in the computer and there is no short ) even with no RAM installed.
  14. I would say some, definitely not most. But it's all subjective really.
  15. You'll need a DIN 5 socket and the UAV, see Manterola's post. btw.. 600xl has the best video circuit of all XE/XLs
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