ma-20 clone (msx2 cartridge)

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By Grauw

Ascended (8459)

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26-03-2016, 13:53

It's said the MSX2+ spec says the VDP can be assumed to be at port 98H (citation needed?) so I'm not sure MSX2+ software would work.

By fzanoto

Master (190)

fzanoto's picture

26-03-2016, 16:02

Manuel wrote:

Um, why are you running Twinbee on it, instead of an MSX2 game? Smile

I will put more vídeos with msx2 games, wait

By l_oliveira

Hero (529)

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26-03-2016, 17:29

gdx wrote:
Manuel wrote:

Um, why are you running Twinbee on it, instead of an MSX2 game? Smile

Without patch the majority of MSX2 games will not work with this expansion.

Every single MSX2 Konami game I tested worked perfectly with this. Only annoying one was Solid Snake because it has a slot expander handling bug on it's original code. But by connecting it to the last sub-slot of the expander it works perfectly.

MSX1 MEGAROMs also worked perfectly (all of them). Only very early MSX1 games (the Japanese release of Antarctic Adventure, for example) had port 98 hardcoded so it ran but all the video were outputted on the original MSX1 VDP.

I'd say 95% of the Japanese software actually work with this kit. (the 5% of stuff that doesn't work are mostly home brew stuff like music players or such. Very few commercial games have problems with this)

European software? 0% will work. (ha ha ha)

By Fabf

Master (222)

Fabf's picture

26-03-2016, 19:13

Does your board output 31Khz VGA ?

By fzanoto

Master (190)

fzanoto's picture

27-03-2016, 00:32

only 15khz

By fzanoto

Master (190)

fzanoto's picture

29-03-2016, 01:04

soon new prototype:

By Paranosh

Expert (71)

Paranosh's picture

29-03-2016, 01:44

By gdx

Prophet (3048)

gdx's picture

29-03-2016, 02:21

I'm going to sound as a spiteful gossip but to play MSX2 games a MSX2 is preferable even if it is a Japanese keyboard. To make a ma-20 clone is a great exploit but It'is not very useful to use.

By l_oliveira

Hero (529)

l_oliveira's picture

29-03-2016, 03:28

You know nothing.... Hahaha
I hacked MA-20 ROMs for International keyboard layout. Brazilian MSX'es and I even made a 50Hz version. Cool

He will likely equip his cart with flash, allowing the users to flash it with anything they wish.

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