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VDP Mode Registers

by gdx on 17-12-2022, 00:48
Score: 141.7 %, Type: wiki , Comments: 0 comments
MAG (MSX1/2/2+/Turbo R) 4/16K selects VRAM configuration. Write 1 if the VDP is not a V9938 nor ... (V9938 & V9958 only) IE2 enables (1) or disables (0) the light Pen interrupts. (Used only by Korean ... the horizontal retrace interrupts indicated by the register 19 . (V9938 & V9958 only) M3-5 are bits ...

Help: hardware pause button weirdly disables interrupt

by inv on 26-06-2019, 17:26
Score: 141.44 %, Type: Forum topic , Comments: 0 comments
to confirm my guess was to test the voltage of /INT (pin 25) of the VDP v9938 (relative to the ground). ... pressing the pause button once, /INT of v9938 stays at about 90mV, which is definitely low. Even after I ...

Ultra rare SVI-828

by NYYRIKKI on 27-12-2020, 21:02
Score: 141.39 %, Type: Forum topic , Comments: 18 comments
the sockets are... Are those to add V9938 VRAM or maybe to extend RAM beyond 256kB? I believe ... superimpose is missing on this version. Ok... So is the V9938 missing completely or does it have ... or see msx vdp on this board '"v9938". So just an other pc clone. I guess ...

MSX Wings, port of a famous 90's game/MSX 2+/SC11 (Demo/WIP/POC)

by albs_br on 16-01-2022, 04:34
Score: 140.79 %, Type: Forum topic , Comments: 76 comments
is different. The version for the V9938 is less beautiful but still decent. This game has no peculiarities that make it impossible to implement on V9938 such as fast horizontal scrolling. Justifying the version ... smooth scrolling, such that as soon as something can scroll on V9938 it must be done, no matter ...

looking for VDP (Video Display Processor) examples

by ivelegacy on 12-01-2015, 14:45
Score: 140.71 %, Type: Forum topic , Comments: 8 comments
Yamaha V9958 Yamaha V9938 Yamaha V9990 i have found data sheet, i'd like to see ... materials and find the V9938 programmers guide. If that is not enough I can send you source code of a entire game engine running on both V9938 and V9958. thank you could you send me thank you ...

How to recover hw sprites data on SCREEN5

by OrazioLC on 02-12-2022, 16:56
Score: 140.44 %, Type: Forum topic , Comments: 18 comments
http://rs.gr8bit.ru/Documentation/V9938-programmers-guide.pdf I also have created a summary table of all the specifics of setting the VDP according ...

Doubt about SCREEN 7 image files (.s70 and .s71)

by albs_br on 03-08-2022, 17:01
Score: 140.09 %, Type: Forum topic , Comments: 13 comments
is the way. See chapter 6 of V9938 programmer guide . You have to understand that You have ...

SVI-738 VRAM upgrade

by protek on 25-11-2021, 20:55
Score: 140.07 %, Type: Forum topic , Comments: 11 comments
on the wiki it says: wiki wrote: Given that the VDP is a V9938 it's possible to upgrade ...

SVI-738 goes unstable and crashes after warming up.

by protek on 31-10-2021, 17:00
Score: 139.89 %, Type: Forum topic , Comments: 11 comments
replacement VDP on its way. Turns out the first Turns out the first replacement V9938 was marginal. ...

Second batch of MA-20 cartridges announced

by FiXato on 14-01-2018, 19:12
Score: 139.69 %, Type: News post , Comments: 2 comments
of a V9938 , and has a 512k mapper. Although it has the VDP used in MSX2+ systems, the ROM itself ...
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