PC88 - how can be possible?

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Door PingPong

Prophet (3754)

afbeelding van PingPong

13-06-2021, 18:30

https://www.youtube.com/watch?v=eocHbQoNhqI
this appear to me impressive considering that this machine has 4Mhz z80! and 48K or VRAM to move.

Is there any PC88 expert that can explain where is the trick? it does appear to scroll by brute force the display.....
I'm wondering why on a msx1/2 we are unable to achieve this with the same CPU the more advanced VDP and hw sprites...!

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Van jltursan

Prophet (2532)

afbeelding van jltursan

13-06-2021, 21:44

That's not a PC88 series machine, it's the last of the PC-8001 series, the PC-8001 mkIISR with dedicated graphics (dual planes, half the resolution of a PC88 so less VRAM to move and a high speed blitter) and sound hardware.

Van PingPong

Prophet (3754)

afbeelding van PingPong

13-06-2021, 22:10

interesting i cannot find a link where to see all the tech specs.

Van albs_br

Champion (315)

afbeelding van albs_br

13-06-2021, 23:04

Even on a humble 9918 you can have dual planes (parallax effect), if scrolling by tiles (8x8).

There are a few games that use this technique, like this one:

https://www.youtube.com/watch?v=JOdETmEtdhw&t=125s

and this (vertical):
https://www.youtube.com/watch?v=6gUEqk3ie_4&t=315s

Van jltursan

Prophet (2532)

afbeelding van jltursan

13-06-2021, 23:06

Probably the Japanese Wikipedia article is the best source out there. Despite being pretty powerful, it was a short lived machine and there's not too much info in the web.

Van AxelStone

Prophet (3020)

afbeelding van AxelStone

15-06-2021, 15:43

Very nice version, I would love that Namco should produced a MSX2 version of Pac Land, was one of my favourites coin ops. We only had the Spectrum port for MSX1, that in any case has a very nice music and not so bad graphics considering they are monochrome.

Van smx

Resident (48)

afbeelding van smx

15-06-2021, 16:19

Did you see this? PacLand in Basic

Van AxelStone

Prophet (3020)

afbeelding van AxelStone

15-06-2021, 16:22

So nice! Unfortunately according to the description, it's only a test with the main character and background, so no real project to be finished.

Van BananaPie

Resident (58)

afbeelding van BananaPie

15-06-2021, 17:13

I don't find the scrolling to be superior to various games on the MSX1/2. Am I missing something?

Van PingPong

Prophet (3754)

afbeelding van PingPong

15-06-2021, 22:56

AxelStone wrote:

So nice! Unfortunately according to the description, it's only a test with the main character and background, so no real project to be finished.

that's interesting, the scrolling is somewhat faster than i've suspected. it does appear to be screen 5.
how they did this scroll routine.

Van Grauw

Ascended (10007)

afbeelding van Grauw

15-06-2021, 23:03

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