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Showing results for tags 'TMS9928A'.
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Has anyone ever tried figuring out how old your beloved machines are going by the occasional date codes printed on the microchips used on the console CPUs and cartridge ROMs? For example, some Texas Instruments chips may have a date code in the format of year/week. One or more of these may have "8249" stamped on it, which means year 1982, week 49. I am sure there are other date code formats used on these besides. Have any of you discussed date codes of microchips yet? ~Ben
Hi guys, I would like to know your experiences with Monitors/Displays for running your TI-99, be it the US version (Composite) or the (European) PAL version using the YPrBr, or via the french RGB modulator RVB PHA 2037. Also I would like to know whether anyone tweaked his US console with a TMS9928A to get YPbBr out of it? It looks to me this is the best video chip to maintain the original desired speed of 60 Hz but getting the video signal via 3 component lines. The official TI branded 10" monitor is nice, I am missing the option to have RGB or YPrBr input. Even though there is supposed to be a PAL Version, that is nowhere to be found. I know about the F18A as video chip alternate with VGA output, I have two at home, however I am aiming for one setup now running the original experience. Sprites look so much more organic if there is Scanlines. In regards to the Monitor, I read a lot about Sony PVM CRT (Sony Professional Video Monitors) being the ideal displays for Retro Gaming since they don't upscale or screw up the video by believing it's interlaced content. Their geometry and quality is supposed to be outstanding. And from watching videos running RGB modded game consoles I can only agree with them. Sony PVM means they were not meant for the Consumer market but for the Professional market and therefore super expensive. Above that level is ever a higher class called Broadcast Video Monitors (Sony BVM). Those have even higher quality standards. Those devices can be feeded via Composite Input but you should aim for YPbrBr or RGB video as Input for those. Here is some example video, there are lots out there, it's kind of hard to capture the quality of those devices since they are from CRT (interlaced) running 60fieldsPerSecond and Youtube has 30fps: People talk a lot about 240p meaning, even though the console renders two fields via it's analog video out ports the content of those two fields match one progressive frame. A lot of TVs/Upscalers treat the ouput wrongly as 480i and starting to process the video with which then the problems starts. BR Klaus
Does anyone know what the recommended saturation level should be regarding the TMS9928A VDP as used on the ColecoVision? I have played around with various values like 0.47 (same as the value used for the R-Y and B-Y values of the neutral colors and which makes the TMS9928A colors have similar values as the TMS9918A), 0.53 and 0.8 (the maximum luminance figure seen in the TMS9928A datasheet). Thank you, Benjamin "Ben" Edge