One chip MSX improvement project

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By HRA!

Master (149)

HRA!'s picture

19-04-2008, 14:36

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.

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By Manuel

Ascended (15122)

Manuel's picture

19-04-2008, 14:58

Very cool!

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

By KdL

Paragon (1140)

KdL's picture

19-04-2008, 15:17

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

By Manuel

Ascended (15122)

Manuel's picture

19-04-2008, 15:41

Is there another license that *is* compatible?

By NYYRIKKI

Enlighted (5173)

NYYRIKKI's picture

19-04-2008, 15:43

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?

By NYYRIKKI

Enlighted (5173)

NYYRIKKI's picture

19-04-2008, 15:49

By HRA!

Master (149)

HRA!'s picture

19-04-2008, 16:18

> F1 Spilit 3D Special

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

By HRA!

Master (149)

HRA!'s picture

19-04-2008, 16:39

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

By Ivan

Ascended (9040)

Ivan's picture

19-04-2008, 17:32

I concentrates on the V9958 interchangeability function now.That's MSX2+ compatibility, isn't it?

By HRA!

Master (149)

HRA!'s picture

19-04-2008, 18:04

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 Smile

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 Eek!

By HRA!

Master (149)

HRA!'s picture

19-04-2008, 18:56

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 *_*

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