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Wanted: V9990 chip for hardware development
Score: 1219.68 %,
Type: Forum topic , Comments: 3 comments
I want to buy a single V9990 chip for development. I am building my own computer with a V9958 already, and want to add V9990 superimposed.
From China I have a quote for MOQ 50 pcs @ $24 each. ... don’t have a V9990 for you. I don’t have a V9990 for you. But those pictures show a lot of I/O ...
Need info from V9990 owner
Score: 1231.76 %,
Type: Forum topic , Comments: 9 comments
I'm developing V9958 and V9990 video cards for my homebrew computer.
One thing I'm not sure about from the V9990 data manual is the chip package! No drawing in the data manual!
I think ... with a Tecnobytes or other card could measure
the V9990 chip body and the pins to a 1mm tolerance. Like, confirm ...
Direct Video Memory Access (DVMA) for V9938
Score: 83.01 %,
Type: Forum topic , Comments: 52 comments
will not need of the mapped vram access for 90% of situations.
As an example, the V9990 uses a similar port ...
Do-It-Yourself MSX
Score: 86.61 %,
Type: Forum topic , Comments: 91 comments
will be great
Fully agree, just note that it's not easy to solder (and desolder) V9990 or other VLSI, ... just note that it's not easy to solder (and desolder) V9990 or other VLSI, thus "field fail ...
New GR8BIT video board
Score: 124.08 %,
Type: Forum topic , Comments: 19 comments
a demand for it. Let me check with SymbOS team...
it would be nice. v9990 is a whole other vdp than i ...
V9938 programmers' guide
Score: 636.73 %,
Type: Forum topic , Comments: 65 comments
not, which chip it uses? And can V9990 only be found in addon GFX cartridges?
You have the answers ... section
[quote]And can V9990 only be found in addon GFX cartridges?[ And can V9990 only ... able to find some minor and major errors which I will point out per page:
page 3, The V9990 has ...
V9990 help needed - picture size mapping to VGA
Score: 1240.5 %,
Type: Forum topic , Comments: 0 comments
I am analyzing the V9990 datasheet .
It has some very valuable information, some is missing, some must be guessed.
At present I am trying to figure out how to map V9990 modes into the VGA timing. The most data intensive at RGB555 modes are B2 and B3:
B2: DC=7.2 MHz, HS=15.7 kHz, ...
Is there any software built for V9990 for 50 Hz and interlaced modes?
Score: 1237.96 %,
Type: Forum topic , Comments: 3 comments
kHz HS. Thus V9990 needs some additional controller, or be used with CVBS/composite or S-video. ... the frame rate still a problem these days? I think V9990 can display 640*480 non-interlaced?
bore ...
V9990 and VGA tradeoffs
Score: 1230.16 %,
Type: Forum topic , Comments: 2 comments
V9990 and VGA tradeoffs
interesting Japanese MSX video
Score: 140.64 %,
Type: Forum topic , Comments: 6 comments
with built-in V9990 chip, so not fully backward compatible).
The GT was sold from '92 to The GT ...
