This is an interesting enough one that I dug out my console and minimem tonight. :) Working on a ColecoVision game in so-called "half-bitmap" mode, it was ...
Wow, that is pretty interesting. And it's even more amazing that it has only recently been 'discovered' after all these years! Of limited practical use though,...
I think a read about the one in the MSX community a while back. Wasn't this behaviour somehow impacted by the VDP temperature? Like it worked when the msx was...
... Even in the MSX community, there was very little I could find about it. I didn't see anything about temperature, and I can tell you with certainty that my...
I am in the process of building a TI-99/4A System 3 (Geneve, V-2.2 or something.). I had two. Now I have four of the Dreamboxs. They seem to last for years....
Speaking of video, is there any way to remove the discoloration of the 99/4a's composite video signal by hooking up an LED or LCD display? I heard that the...
... We've been down this road. The 9928A is socket compatible except for the video output pins. You will need to build a new output stage to convert its video...
I think he means the artifacting that happens on the composite out of the 9918 and there are projects to fix that on mainbyte so dunno why the hubub bub On...
http://www.mainbyte.com/ti99/display/display.html http://www.mainbyte.com/ti99/display/display2.html Are two sites that have projects that may solve your...
There is an article in MICROpendium; August 1988, starting on page 29; by Tony Lewis that is a good read. It discuss the chips. I have read a few articles. I...
This effect is mentioned in the "Video Display Processors: Programmer's Guide" SPPU004 pages 8-8 and 8-9. I mentioned quite awhile back about having problems...
... Hm! Where can I find that guide, and more importantly, does it offer, or did you find, a workaround? I'm not interested in the 'effect', I'm more...
... Found the manual, that wasn't so hard. The description isn't very detailed but does match the descriptions of the effect. All it has to say is: This mode...
... No, I didn't find a work around. Got too frustrated and threw in the towel. I got the books from Texas Instruments in '91/'92, after giving them a call...
... Hmmm, I just checked (using Classic99) some old classics, Parsec, Donkey Kong, Burgertime, Pac-Man, Moon Patrol and Hen Pecked, and they all play it "safe"...
... Good to know, that may have been a frustrating problem to encounter when I get to my sprite engine for special effects in my CRPG. Fortunately I wasn't...
... Yeah.. my ColecoVision Mario Bros was my first real foray into 'half-bitmap'... looks like I'll have to change back to a full bitmap mode. That is...
... Indeed it was, it was part of its marketing. :) From what I recall of game play, most of the creatures were not sprites, but characters... I think the only...
... I guess it is a very good example of not needing sprites to have a great game. I remember mostly the multi-colored, animated tiles in that game, thanks to...
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