Yamaha V9978 Datasheet!

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Por arnold_m

Master (173)

Imagen del arnold_m

18-04-2008, 20:03

msd: ah, so, so far no differences with V9990?
It's a pity that this 16-bit bus is not used on the MSX version of V9990 then...

The page does not list explicit V9958 compatibility modes, right?
The MSX only has an 8 bit data bus, so unless the V9990 has support for byte writing, adding direcht VRAM access to the graphics 9000 is likely to be more trouble than it's worth.
Does the V9990 need to support byte writing? I don't think so; vdp commands can be used instead to set pixels, and for larger changes having a 16 bit bus is an advantage.

Por Manuel

Ascended (18844)

Imagen del Manuel

18-04-2008, 20:30

Hmm, these 2 pages are practically identical to the first 3 pages of the V9990 Application Manual (E-VDP-III ;-)

Por msd

Paragon (1472)

Imagen del msd

18-04-2008, 22:25

arnold_m.. yes it supports byte writing...

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