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A trimmer capacitor with a reasonable range instead of a fixed capacitor on the V9958 pin 63 would be useful to fine-tune the frequency and get good colors.
On one of my aged TVs, I need to put a f…
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Hi,
I just finished assembling the MSX Unit on the Enhance backplane (Yellow 80 pins)
I have the following boards:
-Stock RC2014 Processor and Clock (Both tested to work under RomWBW)
-Vi…
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There is a relevant difference between the tms9918 and the v9938/58 while in vblank.
https://www.msx.org/forum/msx-talk/development/tms-vdp-timing-testing?page=2
On tms you can set the vram for read…
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To reproduce:
1. start up an MSX2 with V9958, e.g. Boosted MSX2 EN or take an NMS 8250 and change the VDP to V9958...
2. ...with attached disk image
3. after the image shows up, press space to exit th…
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Except for the Video9000, none of the later V9990 cartridges had the superimposer to allow the V9990 image to be placed over the V99x8 image.
Please add this feature, because:
1) It allows for…
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**Reported by sd-snatcher on 2013-07-11 21:11 UTC**
The new VDP I/O timing emulation broke ExperTurbo support, because the /WAIT feature of the V9958 isn't emulated yet.
Solution: Emulate the /WAIT f…
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Hello,
Nice project in combination with pico9918.
Any plans to implement F18a functionality?
wiesl updated
5 months ago
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As you offer v9958 installation, it could be good to offer an upgrade option to MSX2+. This will require port F4 and FM-PAC mono functionality. The FM-FAC SRAM option could be skipped. And you need a …
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On V9958:
debug size VDP\ regs results in 64
debug size VDP\ status\ regs results in 16
AFAIK, there are less registers on a TMS99xx VDP, but, exactly the same size is output.
Checking this si…
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As discussed in this thread and this comment onwards, on mrc: https://www.msx.org/forum/msx-talk/development/wait-15-t-states-between-reading-and-writing-to-vram?page=4#comment-422595
**In vblank**…