VScreen Questions

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Par PingPong

Prophet (4093)

Portrait de PingPong

17-08-2007, 14:13

Hi,

Anyone know if the VSCREEN engine can work without the masking sprites used to hide the border?
Maybe could be used with 8 sprites on row?

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Par Maggoo

Paragon (1217)

Portrait de Maggoo

17-08-2007, 16:47

Yes it can, just a very small update to the source code would take care of it. It would also make sense to use characters for some moving items...

Par PingPong

Prophet (4093)

Portrait de PingPong

17-08-2007, 18:22

thx, Magooo.

Recently, ( see sp manbow2 ) it was proved that a limited horizontal scroll is possible also on screen 5 at the following conditions:
-draw a part of the screen on a hidden page after using r18 to fine-scroll horizontally.
-do not draw unchanging tiles between frames.

I've done some experiment and the horizontal scroll could reach 65 fps at 60hz on a 28*20 char area in sc5.

It's possible to modify the vscreen engine and make it working in screen5 ?

Par Maggoo

Paragon (1217)

Portrait de Maggoo

17-08-2007, 20:03

Everything is always possible but I think writing a new engine screen 5 based (like the one of Total Parody) would make more sense... VScreen is very much based on the idea of a tile based screen mode. A V9990 port would be much easier than a Screen 5 port...

Par PingPong

Prophet (4093)

Portrait de PingPong

17-08-2007, 20:49

@Magoo: v9990 is a to high spec hardware. my wish is to do a v9938 implementation, but taking this in account it's not an easy task.

Maybe the engine could be also sw-tile based, by blitting the chars stored in vram. (My test program does this)

Of course, v9958 / and especially v9990 make the programmers life easy, but restrict the number of msx'es where could run...Tongue

Par PingPong

Prophet (4093)

Portrait de PingPong

18-08-2007, 13:44

@Magoo: do you think is possible to adapt ( o rewrite ) VScreen using screen 5?

Par Maggoo

Paragon (1217)

Portrait de Maggoo

29-08-2007, 14:45

Writing a new sc5 engine is possible of course, but I would not be interested in doing such thing myself. You would be very limited regarding how fast you can scroll, perhaps one or two pixel at a time. Not exactly ideal when you want to make a fast action game...

Par Manuel

Ascended (19273)

Portrait de Manuel

29-08-2007, 14:53

Maggoo: what's the status and plan of VSCREEN anyway?

Par Maggoo

Paragon (1217)

Portrait de Maggoo

29-08-2007, 18:04

Last version is still 1.0. I made a few changes to the code to be able to compile on the PC using a cross assembler and have a few ideas for improvements but right now, I barely have the time to even turn on my MSX.

Par Warchild

Paragon (1298)

Portrait de Warchild

20-11-2008, 17:38

Hi! I'm looking for that VSCREEN, I've tried a lot of searches and links but it didn't seem to be on the net... I've found some demos but not the engine... is it available?

Thanks

Par Manuel

Ascended (19273)

Portrait de Manuel

21-11-2008, 10:47

What about this: http://users.skynet.be/bk263586/vscreen.htm

The latest there is 0.9 though...

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