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Everything posted by river9999uk
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Colecovision with VRAM issue..I think
river9999uk replied to river9999uk's topic in ColecoVision / Adam
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. -
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?
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Making a new colecovision bios need a guide ?
river9999uk replied to river9999uk's topic in ColecoVision / Adam
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. -
Making a new colecovision bios need a guide ?
river9999uk replied to river9999uk's topic in ColecoVision / Adam
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 ? -
Making a new colecovision bios need a guide ?
river9999uk replied to river9999uk's topic in ColecoVision / Adam
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 -
Making a new colecovision bios need a guide ?
river9999uk replied to river9999uk's topic in ColecoVision / Adam
Thanks guys...I'v got a programmer and some eproms on the way so lets see how I do. Will report back... -
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 ?
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Yup count me in please....missed it first time around
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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.
- 100 replies
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- 1
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- Colecovision
- Opcode
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OFFICIAL Reservation Thread for Hover Bovver
river9999uk replied to SoulBuster's topic in Intellivision / Aquarius
oppsss...stick me down for a lovely CIB one please. -
please put me down for a copy if there is any more made. Thnaks
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The Lost Caves of Kroz Order Thread
river9999uk replied to SoulBuster's topic in Intellivision / Aquarius
Come on postie...where are you. This is on my xmas holiday sneak off and play list while my relatives natter on about stuff -
Intellivision Homebrew Release Calender for 2015 and beyond
river9999uk replied to Rev's topic in Intellivision / Aquarius
TRON Deadly Discs 2 ? If that came true I would frankly be unable to contain myself.... :-) -
ColecoVision Trading Cards with Binder!
river9999uk replied to pboland's topic in ColecoVision / Adam
Ohh these are nice. Any chance or a re-release ? -
Yes I'll take one of each as well :-)
- 86 replies
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- Space Invaders Collection
- Pac-Man Collection
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Looking nice
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Dear Sir/Madam I would like to complain in the strongest possible way to aliens abducting my videogames. I feel something must be done to counter this video game menace. I feel only the strongest possible show of force will send them back to the moon (or nearest alien lair ) and allow us to enjoy our retro gaming in the peace that we so deserve. I hope you will publish these comments to make forum members fully aware of the dangers of aliens and waiting for packages.... Yours sincerely A.Gamer
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Team Pixelboy News Bulletin - October 16th 2014
river9999uk replied to Pixelboy's topic in ColecoVision / Adam
I wanted to bid but it wont let me as I am in the UK...any chance ? -
Any chance of a sequel which will feature 1 player action ? I've ordered this but not sure if I can get my 7 year old daughter to play this with me :-)
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COLLECTORVISION - Official Ordering Thread for SYDNEY HUNTER
river9999uk replied to Rev's topic in Intellivision / Aquarius
Hi. Do you know if my copies have shipped yet ? Itching to play what looks like a awesome game!!! -
Reproduction of boxes and variations
river9999uk replied to Crapahute's topic in ColecoVision / Adam
How about Parker Revenge of the Jedi boxes ? -
Mr Bee please put me down for one in the lottery ! Thank you and long live the hive !