Dr.OG
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August 27, 2023 at 5:47 AM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57872
Hello! The store sent me a new board that arrived on Friday. The colors are fine with the new unit, blue is no longer missing! Image quality is brilliant, the first board was faulty. So it’s all good now, thanks for the help!
August 17, 2023 at 5:36 AM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57783Unfortunately I don’t have an oscilloscope.
Checked the connections with a multimeter, solders seem to be fine. Actually true blue is missing, but I have i.e. magenta, which contains some blue.
I feel I’m stuck with the problem. I can’t investigate it further without special equipment (i.e. oscilloscope) which I don’t have. Besides I’m not good in SMD soldering, and I don’t want to make things worse during experimenting…
MB will send me another board, as they consider the possibility of a faulty board at this point.
If that won’t work either, I’ll send my TI99/4A to to BetaGamma in Greece for further inspection.August 2, 2023 at 5:50 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57648Besides my only SCART-capable flat panel TV shows the same with TI99/4a+TMS-RGB-V2 (see the 5th post in this topic): grey background and purple squares instead of blue. Medusa shows the same via HDMI (sorry for the stripes, I didn’ adjust pixel clock properly):TMS-RGB-V2)” width=”2080″ height=”1560″ />
August 2, 2023 at 5:45 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57647Of course medusa is working great with other RGB sources. Tried with various retro devices, and MiST FPGA as well. Attachment shows NeoGeo core, colors are OK.
July 31, 2023 at 6:34 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57627The last picture shows the mobo of my TI99/4A, with the TMS 9929A chip.
July 31, 2023 at 6:31 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57626Connecting TMS-RGB-V2’s RGB output to Gonbes GBS-8200’s RGB input the picture is a mess, no matter which resolution I choose.
July 31, 2023 at 6:27 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57625TI’s direct component output attached to Gonbes GBS-8200, VGA scaler set to 800×600. Bad white balance, but blue colors seem to be OK on TV.
July 31, 2023 at 6:24 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57624The third screenshot: TMS-RGB-V2’s RGB output via SCART. Medusa and Vortex shows the same: gray background instead of cyan / light blue, and no real blue shades (seems to be violet).
July 31, 2023 at 6:19 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57622The 2nd shows the screenshot taken from my previous TV’s framebuffer, TI attached directly via component cable. White balance is not perfect, but blue and purple colors are different.
July 31, 2023 at 6:15 PM in reply to: TMS-RGB-V2 board with PAL TI99/4A (TMS9929A) – wrong colors, lacking blue #57620Thanks for your suggestions!
Here is the first pic, which shows the orientation of the daughterboard (TMS-RGB-V2) soldered to the TI mainboard’s bottom: -
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