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river9999uk

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  • Gender
    Male
  • Location
    Devon, England
  • Interests
    Electronic music eating lasange and pasties!
  • Currently Playing
    TRON
  • Playing Next
    Star Wars

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Chopper Commander

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  1. Just for info I tracked this down to 3 out of my 4 coleco power supplies only getting 4.6-4.7v max to the board. My 4th power supply got 4.8v to the board at the graphics issues went. Despite the power switch being taken to bits and cleaned and the pcb being recapped the power socket to ram circuit dropped around .2v and this was enough for the secam pcb to show these issues. Oddly my 3 other PAL colecos were quite happy with voltage of 4.6v and worked fine. Must be something to do with the secam RGB output perhaps ? Either way mystery solved.
  2. Repairing a Secam French Colecovision (thats why the colours are wrong as I am using in on a PAL TV) with what I think is some sort of VRAM issue. I've replaced the VRAM with 4164 ram and done the 5v mod. However the graphics issue with lines and corruption continues. I have cleaned the switch and checked the voltages which are fine on the PCB and at the RAM. Running the diagnostic rom I get the VRAM error fail always at the same location. Anyone have any clues as were to look next?
  3. I have been supplied some great info showing that looks like you can use a 2364 to 2764 adaptor (28 pin to 24 pin). I have ordered one to take a look.
  4. Yes sorry meant the TMS4764NL. The PAL rev D board does not have the extra holes so you cant do the small mod and put a 28pin socket in ?
  5. Ok fell into the trap! I programmed a 27c64 (28pin) only to find out that the TMS9929A is 24 pin so the new BIOS wont fit ? Does anyone have the pinout of the TMS9929A so I can make an adaptor for the 27c64. Thanks
  6. Thanks guys...I'v got a programmer and some eproms on the way so lets see how I do. Will report back...
  7. Guys. I have narrowed my colecovsion fault down to the BIOS. I borrowed a friends BIOS and my console works with his in it and does not with mine (and visa versa). I'd like to download and write a new bios for mine but need a dummies guide (and equipment needed). I like to play with this sort of thing so I am up for the challange! Any help, links etc etc are most welcome ?
  8. Yup count me in please....missed it first time around
  9. No worries. Happy to wait as I can understand the admin must be a nightmare. I am just happy you are offering the games special edition or not.
  10. please put me down for a copy if there is any more made. Thnaks
  11. Come on postie...where are you. This is on my xmas holiday sneak off and play list while my relatives natter on about stuff
  12. TRON Deadly Discs 2 ? If that came true I would frankly be unable to contain myself.... :-)
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