what is the status of Slotmans 'prince of persia' ?

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By PingPong

Prophet (3556)

Аватар пользователя PingPong

05-04-2008, 15:17

About the underevaluated vdp cmd engine i think good examples of sw sprites are kpiball from matra or blade lords. they use smooth sw sprites
(kpi uses also some big balls)

By AuroraMSX

Paragon (1901)

Аватар пользователя AuroraMSX

05-04-2008, 20:42

So even having a z80 access would not improve almost anything (to be precise, in some situation could improve the way we can access vram, resulting in a improvement, but on the majority this is not the true problem) because the video accesses from/to CPU MUST WAIT THE availability of VRAM. Only when VRAM is idle for the task of video generation the CPU can access. And the problem here is that the VRAM is almost always busy for video task.Then I guess the real solution would be to have the VRAM as dual-ported RAM so that the Z80 and the VDP can access VRAM at the same time. ;) Ok, it's probably a tad expensive but hey, we'd at least have a fast machine! :P

By PingPong

Prophet (3556)

Аватар пользователя PingPong

05-04-2008, 20:51

So even having a z80 access would not improve almost anything (to be precise, in some situation could improve the way we can access vram, resulting in a improvement, but on the majority this is not the true problem) because the video accesses from/to CPU MUST WAIT THE availability of VRAM. Only when VRAM is idle for the task of video generation the CPU can access. And the problem here is that the VRAM is almost always busy for video task.Then I guess the real solution would be to have the VRAM as dual-ported RAM so that the Z80 and the VDP can access VRAM at the same time. ;) Ok, it's probably a tad expensive but hey, we'd at least have a fast machine! :P

Not required. if VRAM can cope with a half period of access then both the vdp / z80 can use it more faster.
That's the secret of advram. Having those vram chips allowed also a faster vdp without the needing to change the way z80 interacts with vram. take in mind that v9990 uses dual port ram but is i/o based like the other vdp's. And it's not slow.... So not a question of way to access, mainly a question of vram speed....

By nikodr

Paladin (744)

Аватар пользователя nikodr

27-05-2008, 05:31

By pitpan

Prophet (3133)

Аватар пользователя pitpan

27-05-2008, 08:43

Bu IIRC PoP was never officially released for ZX. There's just a Russian port made for some of these CCCP clones with higher CPU clocks and subtle hardware differences. Again, I might be totally wrong Sad

By Manuel

Ascended (17075)

Аватар пользователя Manuel

27-05-2008, 09:19

niko: no, that's the VDU/VSU (whatever it was, sorry for not looking it up) demo, written in basic.

By pitpan

Prophet (3133)

Аватар пользователя pitpan

27-05-2008, 15:06

Ok. Checked! The Speccy-alike version is not that bad. You can all check it here. Please note that "World of Spectrum" is apparently entitled to host these games, therefore linking the playable java version isn't against the MRC policies.

By jltursan

Prophet (2344)

Аватар пользователя jltursan

27-05-2008, 15:21

Look here for a nice video about the zx's russian port of PoP. It really runs amazingly smooth!

By Skyblasc

Resident (56)

Аватар пользователя Skyblasc

28-05-2008, 14:26

kpiball from matra

Not Matra, but spanish team Boh-Ken ( some of them now in Kraliceck)

Just pointing that out Tongue

By ray2day

Hero (567)

Аватар пользователя ray2day

11-09-2010, 01:02

Any updates on this port / project?

Prince of Persia is game I really would like to see work on MSX.

(I googled on it, therefore I hit this old MRC forum subject)

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