Outrun style road demo MSX2

Alleluia!
This is the usual story that is always mentioned by spectrum coders that only know spectrum and try to code msx as a spectrum. Obviously changing each occourence of :
ld a, 20
ld hl, somevramaddr
Ld (HL),a
with
ld a, 20
ld hl, somevramaddr
call WRTVRAM
Does not give of course the same performances!

But as grauw said, bitblitting operations tend to be block oriented and a out(0x99),a is not soooooooo slow than a ld (hl),a for sequential access. a sw sprite is a good example of contiguos vram access as it is a scroll routine.

Plus some games need to implement a sw tiled mode in spectrum while on msx one can take advantage of hw tiled mode (nametable).
not to mention sprites.

the only thing where performances clearly suffer is when you do a lot of single byte vram access in non sequential way.
like this:

(in basic)
PSET (RND(1)*256, RND(1)*192)

of course, because each time the VRAM PTR need to be set an msx is about 8 times slower than a spectrum.

But if you move 32 contiguos bytes of vram the situation will be a lot different and the overhead of setting vram ptr is not so heavy.

There are also some situations where one can take advantage of autoincrement feature resulting in better performances that a standard RAM move loop on z80 main memory.

The real brake is the vdp delay only in active area and only on msx1.

I don't like Full Throttle at all. It is the precursor of Chase HQ.

Those are harsh words ... I'm not quite sure diplomacy is your forte
But I can somehow understand them, as I was the first to voice them, about a week ago.

Anyhow, there are 3 things to consider :

• I do this for my own pleasure. Coding and having a game that I like and is up to what I had dreamed.
• I'm alone. I don't have a team like Vespertino's. Coding takes a lot of time, and we all know life does not give us a lot of that. So if the V9990 helps me to get to the game faster and with better results, I'm all up for it.
• The hardest part of that game is the road rendering engine. And I have proved it can be done on an MSX2. The rest is "just" managing sprites on screen and add some music. The difference, however, is in the result.

It is not a matter of harsh words.
Today one can got better version than the arcade with a modern PC using a high level language.
But obviuosly what's the fun? you can code this game even in javascript.

About your osservations:
1) If it is for your pleaure i suggest you to code for V9990 (if it is a pleasure for you). Instead it would be interesting comparing V9938 and V9990 to see what is the difference in the end result due to the different hw.
I clearly suspect that the V9938 will not get any development instead.
2) You are alone, but i think no one had pushed you. And i think no one had ever pushed anyone in any projects. There are a lot of unfinished projects here due to various reasons but i think no one on MRC complained directly to the developer(s)
3) You have already used the full power for the road rendering engine and very little power is for "just" doing others things. Would be interesting adding those features and see how this impact on the road rendering engine fps.
maybe it is playable enough.

Very interesting, he seems to be using lots of raster tricks
I guess that the road stripes are a bunch of multiplexed sprites
https://www.youtube.com/watch?v=0vakiHsLylk