MSX Prototype of Kay Nishi given to Luc Sala

Ascended (19258)

07-10-2007, 20:53

Did someone notice this: (I found the item on MSX Posse)

http://www.digibarn.com/collections/games/msx-prototype/index.html

I submitted the following comment:

This seems to be a prototype of a Yamaha MSX2. The motherboard says YIS-604 and CX7(M).
MSX2 was released in 1985, so it must be earlier than that. MSX(1) machines got released in 1983, so I guess it is from around that time, around 1984.

The photo http://www.digibarn.com/collections/games/msx-prototype/CIMG9421.JPG shows that the machine has an S-3527 MSX-ENGINE (called MSX-SYSTEM in Japan). This is the first attempt to put a whole computer on one chip. (A few years ago made reality by release of the 1-chip-MSX, with a whole MSX in an FPGA...) More info about this on Wikipedia, also on the Japanese Wikipedia.

By AuroraMSX

Paragon (1902)

07-10-2007, 21:41

Very cool pictures

By Sd-Snatcher

Hero (582)

07-10-2007, 21:49

Only looks like an unCASEd msx mounted on a metal plate.

Can't see any temporal cabling or anything that look like a prototype.

By Pentarou

Champion (493)

07-10-2007, 22:29

One of the Eproms has a date code of the 8th week of 1985, so it is impossible that this prototype was built before that date.

By Manuel

Ascended (19258)

08-10-2007, 09:18

Ah, great info! So, it really is a typical MSX2 prototype from around 1985!

By Jipe

Paragon (1593)

08-10-2007, 14:55

it's a joke
just a CX5MII in a metal box with MSX2 eprom
the keybaord is also CX5MII part
a prototype have not a very nice board but some wire and sold for adjust error

By Manuel

Ascended (19258)

08-10-2007, 16:36

The PCB of the mainboard says YIS 604, CX 7, CX 7M.... definately MSX2.

By Jipe

Paragon (1593)

08-10-2007, 17:54

yes and is also the PCB of CX5MII
look at Hans Otten page the Manual of this MSX