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Unknown VDP: Yamaha YM2220
Score: 146.29 %,
Type: Forum topic , Comments: 37 comments
Hi,
I bought a Victor HC-30 , supposedly an MSX1 with a V9938 VDP and 16KB VRAM, ... with the V9938 or V9958.
So, I removed the metallic shield and saw that the VDP isn't (as supposed ... but there people guessed that YM2220 was V9938 related, probably because it uses the same package.
For ...
V9958 black and white picture
Score: 146.17 %,
Type: Forum topic , Comments: 13 comments
(R,G,B) with an oscilloscope and the signals look the same as with a V9938, so it looks that the chip ...
Adjust register in games.
Score: 145.06 %,
Type: Forum topic , Comments: 74 comments
Hi, all. As we know v9938 lacks true circular scroll register for X axis.
However adjust ... topic should talk about V9938 games, why it became a "colecovision games are done better than msx ...
thegeps wrote:
"Adjust register in games"
This topic should talk about V9938 games ...
VRAM Maps
Score: 144.5 %,
Type: wiki , Comments: 0 comments
None
V9938 & V9958
Graphic 1
24 x 32 characters of 8 x 8
16 (2 per character)
Mode 1
All ...
Mode 1
All VDPs
Graphic 3
256 x 192
16 (2 each line of a tile)
Mode 2
V9938 & V9958
Graphic 4
256 x 212
16
Mode 2
V9938 & V9958
Graphic 5
512 x 212
4
Mode 2
V9938 & V9958 ...
Omega, no video.
Score: 144.28 %,
Type: Forum topic , Comments: 5 comments
is using a working MSX2+ to test it.
Did you selected the VDP jumpers at V9938 or at v9958 position?
I ...
V9990 tech demo: Twinbee on steroids
Score: 144.13 %,
Type: News post , Comments: 15 comments
sprites beauty even v9938 can do.
may be smooth scroll was doable even on msx1 tms...
v9990 can do FAR ... in public.
Getting back on topic: So probably it can indeed be done on V9938 as well, but developing ... are possible in V9938. Anyway, it's just a proof of concept and to me it looks really promising. Go ...
any idea what is wrong with the unrolled loop?
Score: 144 %,
Type: Forum topic , Comments: 19 comments
level of technical detail on the internal mechanism here:
V9938 VRAM timings
V9938 VRAM timings, part II
It’s about V9938 but also goes into TMS9918, and the concepts are similar.
I’m ...
Undestanding H.KEYI and H.TIMI
Score: 143.06 %,
Type: Forum topic , Comments: 6 comments
hook to handle a line interrupt on V9938 ?
If the H.TIMI is only called on VBLANK, I'm guessing ... by another interrupt generated by the VDP (on V9938) ?
I'm trying to make a screensplit work ... a macro)
nop
in a,(v9938.reg)
rra
call c,split.hblank
Correct ?
And change back so s#0 And ...
TMS9918 designer
Score: 142.85 %,
Type: Forum topic , Comments: 2 comments
and 6502 were both used with the 9918). Ascii Microsoft came out with the V9938 what was developed ... and the DRAMs had gotten faster.
Compare the V9938 ( ... Microsoft came out with the V9938 what was developed by Yamaha and my understanding is a slightly customized ...
v99c37 ??
Score: 142.81 %,
Type: Forum topic , Comments: 3 comments
hi,
anyone knows the vcp ( video display co processor ) v99c37 ,was it included in v9938 ... be written through v9938 bus ...
i suspect v9958 as it included with the yjk/yae modes ...
where ... of page of :
http://ja.wikipedia.org/wiki/V9938
and end of page of : ...
