One chip MSX(KAI)
http://www5d.biglobe.ne.jp/~hra/note/onechipmsx/index.htm

I added some improvements to OCM.
However, it is not perfect yet.
I will keep improving it as long as there is empty capacity of FPGA.

My test is insufficient
Please inform me in this forum when you find the inconvenience.

Latest version:
http://www5d.biglobe.ne.jp/~hra/note/onechipmsx/files/emsx_top_20080419_002.zip

I concentrates on the V9958 interchangeability function now.

Regards.

Very cool!

Is this already part of https://sourceforge.net/projects/ocm-pldpack/ ?

no! the license type isn't compatible to GPL for now, sorry!
some suggestion???

Is there another license that *is* compatible?

I just tried F1 Spirit 3D special and it seems that the scroll has some timing issue (20080419_002)... The scrolling takes too much time?

Ps. the discussion started here:
http://www.msx.org/OCM-PLD-Pack-2.2.newspost4681.html

> F1 Spilit 3D Special

The horizontal scroll was synchronized with the H-SYNC signal.
It might be a cause possibly.
I examine it

New update PLD:
http://www5d.biglobe.ne.jp/~hra/note/onechipmsx/files/emsx_top_20080419_003.zip

Updates:
(1) The bug with abnormal color of sprite on YJK mode is corrected.
(2) update "test_program"

[*]SDCC is necessary to compile the test_program.
http://www5d.biglobe.ne.jp/~hra/note/onechipmsx/files/msxdoslib_070120_000.zip

Quote:

I concentrates on the V9958 interchangeability function now.

That's MSX2+ compatibility, isn't it?

Quote:

That's MSX2+ compatibility, isn't it?

It becomes MSX2+ compatible as hardware.
However, BIOS on EPCS4 is MSX2 compatible.
For instance, KANJI-BASIC cannot be used.

If MSX2+ BIOS is prepared on the SD/MMC card, it becomes MSX2+ compatible

Quote:

The scrolling takes too much time?

I tried "F1 Spirit 3D special".
"F1 Spirit 3D special" takes timing by doing VDP-S#2 in polling.
If it is 10MHz mode, the scroll display is improved.
I think that the timing of the horizontal synchronizing signal is different
from the real thing.

Sprite falls into disorder, too.
The cause has not been clarified yet

New update PLD:
http://www5d.biglobe.ne.jp/~hra/note/onechipmsx/files/emsx_top_20080419_004.zip

Updates:
(1) VDP-R#26/R#27 was changed into the change at once.

The sprite disorder of "F1 Spirit 3D special" was corrected.
However, the road display and the panel display is damaged

WOW! Laydock 2 is playable now.

bugs:
a) intro and ship demo makes a system crash: press the spacebar fastly to skip it and go to game
b) right border isn't smooth (= Space Manbow)

others:
c) TED return to MSXDOS2 with MODE40 with chars problems:
mode 80 restore it!

mmh.. I've prepared a MSX2+ OCM_BIOS.DAT file but the screen is black at boot
and it work only when:

1) I eject my SD-CARD from slot and I press hard-reset
2) from BASIC 2.0 I goes to MSXDOS2 with CALL SYSTEM after SD-CARD is reinsterted
3) then I load A:/ EP NYANCLER.DSK /B/R (nyancle racing)
4) when game start, I press hard-reset again!
5) and then msx-logo is skipped and BASIC 3.0 is loaded!!!

ps. using soft-reset DEFUSR=0:A=USR(0) the system don't reset!

KdL: on MSX2+ and turboR, the boot logo is skipped when doing a soft reset (e.g. via DEFUSR=0:A=USR(0)), maybe that is related?

New update PLD:
http://www5d.biglobe.ne.jp/~hra/note/onechipmsx/files/emsx_top_20080420.zip

Update:
(1) VDP S#2 HR bit adjusted.
--> "F1 Spilit 3D Special" is playable

Memo:
a) I do not have "Laydock2"
b) VDP S#0 5th sprite #(bit4-0) has BUG. (see "test_program\sprite_overmap\SPOVER.BAS"

Quote:

ps. using soft-reset DEFUSR=0:A=USR(0) the system don't reset!

It reset on my OCM.