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V9990 - Discrepency between emulation and PowerGraph Lite

by keith56 on 22-04-2018, 12:25
Score: 118.8 %, Type: Forum topic , Comments: 16 comments
bits at once, which equals four pixels in 4bpp modes. Unlike the V9938 which operates per-pixel ... have to say the V9938 often gets criticised here for its slow command engine implementation, after ... user as well. I have to say the V9938 often gets criticised here for its slow command engine ...

V9990 FPGA recreation.

by BeroBBS on 06-02-2021, 21:11
Score: 132.97 %, Type: Forum topic , Comments: 18 comments
dreaming here but what if we could actually make V9978 in FPGA and make it pin compatible with V9938/V9958. Have it as a drop in replacement of existing VDP (maybe with a jumper to select V9938/58 pinout). The ...

V9990 is not part of MSX

by mars2000you on 14-01-2022, 21:49
Score: 131.35 %, Type: Forum topic , Comments: 132 comments
than their V9938 or V9958, and not very similar to Ricoh's S-PPU. Yamaha's Mark III VDP is also a very different continuation of the TMS99xx from their V9938 with a more focus on sprites, tiled ... I/O). If you want to superimpose the V9990 behind the V9938, just use a Philips NMS8280, Sanyo ...

V9990 Powergraph Light - Does v9990 unlock msx2+ games as well

by siddy6581 on 17-04-2018, 16:51
Score: 138.69 %, Type: Forum topic , Comments: 2 comments
Hi there I have a MSX2-computer. I've heard you could upgrade to MSX2+ by removing the V9938 and inserting a V9958, allowing the computer to run games compatible with the MSX2+ (like Laydock 2). What I would like to know is if addding the v9990 cartridge also gives this compatibility? Or ...

V9990 registers at command termination

by Metalion on 11-09-2022, 08:35
Score: 157.08 %, Type: Forum topic , Comments: 11 comments
Hi everyone, Do we know if the behaviour on V9990 commands is similar as on the V9938 at command termination ? Was it studied ? Like this table for V9938: Table 4.7 Register status ... execution. With V9938 it was possible to chain commands using the fact that some input parameters were ...

V9990 setpage

by Ritter on 24-06-2022, 16:12
Score: 152.7 %, Type: Forum topic , Comments: 5 comments
The "problem" is: The player blinks a little (sometimes). On V9938 we use "set ...

V9990 split...

by PingPong on 06-01-2018, 18:55
Score: 117.04 %, Type: Forum topic , Comments: 7 comments
V9938 kinda just everything works. Disabling display is nice for hiding a line if the split needs ...

V9990 sprite collision detection

by Bogogil on 17-10-2011, 21:52
Score: 446.89 %, Type: Forum topic , Comments: 7 comments
you can still use the v9938 / 58 sprites for pixel pr On msx you can still use the v9938 / 58 ...

V9990 tech demo: Twinbee on steroids

by snout on 11-06-2016, 11:03
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 ...

v99c37 ??

by Leo on 15-05-2010, 16:46
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 : ...
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