Zitat von
hap
I think one person opened the machine, saw the 8MHz XTAL and assumed the CPU is 8MHz. And this machine is so rare, that nobody verified the clockspeed.
It's the same thing that happened with the manufacturer information. Someone in the past assumed it's by Applied Concepts/Chafitz(why?) and every other website copied that information. The company that made this machine is France Double R. ACI/Chafitz were American.
Anyway, CPU is a Z80A.
Z80A = max 4MHz
Z80B = max 6MHz
Z80H = max 8MHz
Thank you for the Information about the CPU. Then, the 4 MHz are correct of course.
Regarding the Information about Chafitz/Sandy: There is a little more information about at the chessprogramming Wiki: "The La Regence was a commercial flop in France - in 1983 Ries' company went into liquidation and some of the remaining stocks could find their way to the Market, distributed by Sandy Electronic, the German company in the dedicated chess computer market otherwise associated with trading Applied Concepts aka Chafitz computers under their own brand."
That means that "Sandy La Regence" is OK because they sold it with this name.
https://www.chessprogramming.org/La_...B_4_La_Regence
See also the photos here:
https://www.schachcomputer-online-mu...-4-la-regence/
You can see that the board is labeled:
La Regence
TSB 4
Sandy Electronics
I don't know if Chafitz also sold the LaRegence under their own name, but I doubt it. I didn't find any information about it.