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wait 15 T-States between reading and writing to Vram
Score: 128.82 %,
Type: Forum topic , Comments: 51 comments
VRAM accesses is equal to 13 Z80 clock cycles (@3.58MHz)
If I read the V9938 VRAM timings (part ... does match, but this actually also applies to TEXT1 mode (width 40), as V9938 VRAM timings (part 2) ...
Question about sprite mode 2
Score: 148.32 %,
Type: Forum topic , Comments: 3 comments
be 1 unless you want mirroring to occur. See page 93 of the V9938 application manual .
So if you ...
VDP indirect register access
Score: 154.88 %,
Type: Forum topic , Comments: 0 comments
Learned something today about the V9938/58 indirect register access which I never gave a thought before
I am playing with an FPGA VGA text mode adapter which mirrors the MSX text screen (screen 0 and 1) by snooping on VDP IO access.
As the BIOS of MSX2 and up uses the VDP indirect register access ...
Remaining VRAM in screen 8
Score: 138.92 %,
Type: Forum topic , Comments: 5 comments
at http://m.gr8bit.ru/gr8bit-knowledge-base.html
For the
V9938-programmers-guide.pdf
(Development) ...
Problem NMS-8245 2+, black screen
Score: 126.88 %,
Type: Forum topic , Comments: 61 comments
to remove the VDP check with a V9938 and original ROM
unfortunately I don't have ...
screen 8 smooth horizontal scrolling
Score: 98.53 %,
Type: Forum topic , Comments: 104 comments
are more frequent.
Now, that we know a little more about v9938 timing i think would be worth ... the 'state' of the currently running command?
Afaik they do. Anyway, look in the V9938 application ... multiple commands in a single frame and squeze the last drop of speed from v9938. As we know, the vdp ...
v9938, Text mode 1, and the LN bit of register 9
Score: 1406.28 %,
Type: Forum topic , Comments: 4 comments
on a project with the v9938 as the video chip, working with an sram replacement for the memory. I am seeing ... a hardware problem
See the TEXT 2 Mode section See the TEXT 2 Mode section of the V9938 ... with my circuit/ram solution.
To test the wiring of the v9938, I am controlling it with a PIC ...
Is the V9938 compatible with SRAM ?
Score: 1377.23 %,
Type: Forum topic , Comments: 20 comments
Hi Everyone,
I recently managed to get some V9938 VDP chips and am thinking about making ... to implement in a design and in a PCB) instead of DRAM chips.
So my question is:
Does the V9938 VDP chip ... of the V9938 but I don't Flyguille, I re-read the datasheet of the V9938 but I don't see ...
Conversion from SVI-738 MSX2 to MSX2+ (HELP!)
Score: 139.03 %,
Type: Forum topic , Comments: 17 comments
logo, then it looks normal. In fact, I tried placing the V9938 (without wiring) and it does exactly ...
V9990 is not part of MSX
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 ...
