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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 ...
MSX 2 Direct VRAM access speeds?
Score: 138.3 %,
Type: Forum topic , Comments: 16 comments
http://map.grauw.nl/articles/vdp_tut.php#vramtiming
Minimum VRAM access timings in 3.58 MHz Z80 cycles
Screen mode VDP mode TMS9918 V9938 / ... with command execution, because I’ve used OUTI many times with the V9938 and never had issues.
Re. your ... vertical blanking period. The V9938 and V9958 are also identical in terms of timing. I would be extremely ...
How is that possible?
Score: 126.81 %,
Type: Forum topic , Comments: 36 comments
be done in MSX1 as well.
> The V9938 looks good enough, but why is it Turbo R only? Have you ... are supported by SLT-Turbo?
It is the same as the VDP (V9938/9958) of the main body to create the base screen ... in the case of V9938, screen 8 has only 2 pages (64KB x 2),
You can make a lot of SLT-Video within 4MB. ...
vdp registers
Score: 104.48 %,
Type: Forum topic , Comments: 13 comments
– b#0 (EV) (external VDP input)
What is it used for? (this bit is not documented in V9938 ... is it used for? (this bit is not documented in V9938 programmers guide)
This is only used on the MSXs ...
3D raycasting
Score: 95.15 %,
Type: Forum topic , Comments: 160 comments
http://www.ccas.ru/brychkov/MSX/V9938_programmers_guide.html
but does not give hints about timings
BTW, your idea of storing textures run length ...
Hidden MSX hardware
Score: 110.22 %,
Type: Forum topic , Comments: 135 comments
XV-J555 -> MSX2 based, SONY XV-J555 -> MSX2 based, S1985 Engine, V9938 and Z80. It have ... HB-A5000 and HB-A5050 Electronic Sketch Pad (V9938).
Sony HB-A5700 and HB-A5710 Electronic Sketch Pad (V9958).
Sony HB-B7000 and HB-B7070 Animation Computer (Z80+V9938).
Sony ...
Simultaneous vblank and hblank interruption?
Score: 138.87 %,
Type: Forum topic , Comments: 11 comments
this function.
Since the V9938 doesn't monitor Z80 instruction fetches it can't clear the IRQ ...
Colecovision > MSX
Score: 89.92 %,
Type: Forum topic , Comments: 259 comments
mirrors that do not exist on V9938/V9958)
Input status: To play converted games on MSX, We need use ...
MSX dominating the game world again
Score: 149.69 %,
Type: Forum topic , Comments: 1 comment
of emulating v9918, v9938, v9958, v9998, so backwards compatible ,but this time GPU is manufactured by NVIDIA, ...
TMS VDP timing testing
Score: 124.83 %,
Type: Forum topic , Comments: 34 comments
needed in the Yamaha's V9938.
Apparently even in VBLANK, V9938 and V9958 need more time to fetch ... is due to vdp timing. if we check the V9938 VRAM timings in vblank there is an access slot every 8 clock ... the v9938 is much faster than TMS when performing cpu I/O. So the difference must be in the initial delay ...
