Don't know if this helps, but here's some information on your motherboard that I found on Wikipedia.
The NEC V40 (μPD70208) is an embedded version of the V20, integrated Intel-compatible 8251 USART, 8253 programmable interval timer, and 8255 parallel port interface. Used in the Olivetti PC1.
Is this the chip you're talking about?
First my special thanks to you! I've read a lot of your posts in this forum about NEC processors before my registration here...I've mentioned the V40 (and the 16-bit V50) several times here. There were a few systems that used them--the Zenith EZ-PC, the Olivetti Prodest, a couple of Epson laptops. It was more heavily employed in Japan--and was an important embedded processor in many products. Most of the V40s that I have are in 68-pin PLCC packages, but they also came in PGA as well as the QFP you've shown.
I've never seen the system. This moterboard was prtesented to me by my neighbour. He says it's from desktop.Is there any chance you remember the type of system that your motherboard came out of? Was it a laptop?
I can't ask him, he is already not alive...
He says it's from desktop.
If this truly is an Epson board, I think I've found your system.
http://en.wikipedia.org/wiki/Epson_QX-10
The QX-10 has an NEC graphics chip. The chip you show on your board is soldered in. This is rather uncommon for CPUs, and the shape and size of your NEC chip is unusual for the eighties.
And my has NEC V40 CPU on board with 16 MHz quartz resonator...The Epson QX-10 is a microcomputer running CP/M or TPM-III (CP/M-80 compatible) which was introduced in 1983. It was based on a Zilog Z80 microprocessor, running at 4 MHz...
It's a good idea! %) You see, usually on EPROMs BIOS provider is written...@iLavr, I see that your board still has the EPROMs on it--why not read them out and tell us what's in them? That would certainly give a hint as to what this thing came from.
See those chips with paper labels on them? Those are what you want to dump.
I can only find a mention of the ST2 in a benchmark report. But now you know what you've got, even if you don't know what it looked like.
You can ZIP the EPROM image up and upload it using the "Go Advanced"/"Attach files" posting feature.
I've never heard of the ST-2. Is it rare?
Probably not--just French and not perfectly PC-compatible.
I'd think the OPlite was far more collectable.
I can only find a mention of the ST2 in a benchmark report. But now you know what you've got, even if you don't know what it looked like.