new msx2+ hardware

oh, so "CPLD" contains much more things than I thought.

I guess the reason for why expanding a 4 slot MSX is expensive is because of a catch 22.
If the 4 slot board were common, there would be more expansions available to complete it.

And some parts could be double use. Like the MSX2 VDP cartridge.
If it were prepared to also work alone in slot 0 and get dip switched to port 98.

Well, I don’t know, but this is what I understand from the (Portuguese) site and posts.

I doubt it.

Besides, please appreciate the beauty of a system like this in stead of dreaming about this! :) As I said, what you are thinking about already exists, it is the EMSX by Padial (it is the second picture). You can buy it if you’re interested in it.

But why? The V9958 is 99% backwards compatible, and the best VDP.

That’s what I meant with “like a One Chip MSX, but with real MSX2+ components where it matters.” This has real components, V9958, PSG, the CPLD is just for MSX-ENGINE logic.

Thinking consequent further, there must be an expander box that is of the side slot type
These ideas may not be practical in a tiny market.
But they could be done with style, whole different way as the IBM PC thing.
The MSX slot is external plugging by the user, that makes it the special thing.

In the video left of the left slot another board is connected.
I wonder, is that part of the machine or was it an expander.

I think this is the key. If the machine is not availlable this is more a hobby than a real project. The Altera DE1 board, with their strengths and weaknesses, is the only moderm MSX that anyone can buy.