New game convertions!

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Por PingPong

Prophet (3898)

imagem de PingPong

30-11-2007, 08:50


On MSX @ 3.57ZMHz... well, this is a whole new history... I believe the game barely runs at 10 FPS... which is... lame. Tongue

30fps? i think a bit too much for the z80. a z80 ldir command can transfer about 170kb/sec
It's a bit too much even for a 7mhz msx system...

I've debugged the vram I/O transfer and i've realized the same crappy thing: ram-vram ->I/O transfers are done with this code:

ld a, (HL)
out (0x98),a

nop
inc h

ld a,(HL)......

notice the inc h, this is used to accomodate the different vram layout on zx / msx.
This is another clause of the slow performances:

In order to re-use the zx speccy sw sprite routines, programmers have been forced to keep the zx vram layout.
they do the conversion during the ram-vram transfer, with a lot of overhead.

game speed could improve a lot if they adapted the zx speccy sw gfx routines to match the msx vram layout.
in this way the ram->vram could be done with a OTIR, a lot faster than the above.

as usual, to take advantage of a specific hw the sw should be adapted.

Por MäSäXi

Paragon (1884)

imagem de MäSäXi

30-11-2007, 11:56

Yes, Martos put the original Spectrum loading screen, instead of the pink background and text of the original MSX version.

PINK background? oO I had blue!

Por spl

Paragon (1470)

imagem de spl

30-11-2007, 12:38

On the copy I have, it has pink background. Yes.

PS: According the Martos website, WEC LE MANS had several editions.

Por cesco

Champion (453)

imagem de cesco

30-11-2007, 16:07

I still remember the day when I purchased AFTER THE WAR for the MSX. It was a game made by Dynamic (I suppose... BTW I remember that it was made in Spain ^___^). Boy, the Amiga version was fantastic and similar to FIST OF THE NORTH STAR, that was (and still is) a very popular Anime in Italy.

Unfortunately the MSX version sucked. A lot.

On the other side, I'm still playing THUNDERBIRDS (Grandslam, 1989) every now and then on my old Philips VG-8020... after 20 years I'm still trying to get through the bank safe in the third mission Smile

Por Ivan

Ascended (9305)

imagem de Ivan

30-11-2007, 16:49

I still remember the day when I purchased AFTER THE WAR for the MSX. It was a game made by Dynamic (I suppose... BTW I remember that it was made in Spain ^___^). Boy, the Amiga version was fantastic and similar to FIST OF THE NORTH STAR, that was (and still is) a very popular Anime in Italy.

Unfortunately the MSX version sucked. A lot.
I enjoyed that game. The graphics are monochrome -but good imho- and there's no music but the game is plenty of action. Big Hercules-like endbosses at the end of the first stages (side A of the tape) Smile

Por Manuel

Ascended (18864)

imagem de Manuel

30-11-2007, 17:20

How can monochrome graphics be good on a colourful computer as the MSX? Or were we too spoilt with Konam games, which are never monochrome?

Por PingPong

Prophet (3898)

imagem de PingPong

30-11-2007, 17:53

I still remember the day when I purchased AFTER THE WAR for the MSX. It was a game made by Dynamic (I suppose... BTW I remember that it was made in Spain ^___^). Boy, the Amiga version was fantastic and similar to FIST OF THE NORTH STAR, that was (and still is) a very popular Anime in Italy.

Unfortunately the MSX version sucked. A lot.

the msx version of dynamic games is usually the speccy one with a more or less slow refresh rate.

So i think that if a zx version is excellent the msx one cannot be soooo inferior....
In those games we talk about msx port or convertion, but should instead talk about a msx1 emulating zx ...
(Of course slowest, considering == the mhz !)

Por PingPong

Prophet (3898)

imagem de PingPong

30-11-2007, 18:20

Groan! chase HQ msx version control the sound via the kb click TongueTongueTongueTongueTongueTongueTongueTongueTongueTongueTongueTongueTongue the sw developer does not know that msx almost does have psg? We asked to much to change the orrible keyclick sound to a more realistic one-channel psg sound ranging from low to high frequency?

Tongue

Por spl

Paragon (1470)

imagem de spl

01-12-2007, 12:28

Chase HQ was converted from the 48 KB version. The 128 KB version has full PSG musics.

Por ARTRAG

Enlighted (6846)

imagem de ARTRAG

01-12-2007, 19:15

while converting those games,
why not adding an auto r800 switch in case of TR?

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