CLASSICCMP digest 496

From: Larry Anderson <foxnhare_at_goldrush.com>
Date: Tue Aug 4 20:08:36 1998

> From: "Hans Franke" <franke_at_sbs.de>
> Subject: CBM B500
>
> Since I rediscovered a B500 in my junk some weeks ago,
> I'm searching for information. Until now i could trace
> nothing in the web or any magazine from that time.
>
> The Computer in question is a Commodore B500, Basicly
> a CBM II LP. I am not talking about the P500. The mobo
> is technicaly the same than the CBM 610 (B128) but a
> different layout (only some lines) and a (lower) part#.
>
Sure it's not a P-500? I currently have mine (P-500) opened for Information
Gathering, might well do some now...

The Motherboard's Assembly Number is: 4256046
The 3 8k ROMs are part numbers: 901234-02, 901235-02, and 901236-02
There is another chip marked FPLA #1 0906114-02
There is a second next to it with it's label removed (dried spooge on the top),
the chip ID is: N82S100N 8235 (I haven't searched the net to determine what
the chip is, one day I may study electronics more....)

> Also the Version/Part#'s of the kernal/basic EPROMS are
> lower than any known (to me) B128/B256/6x0/7x0 type.
>
> The mobo and all chips are dated to 1982 - again way
> before any other CBM II I know. AFAIR the CBM II line
> was introducted in 1983.

Could be a beta prototype or one recalled during the FCC proving. (Commodore
had a run-in with the FCC concerning the B and P series computers...)

>
> Any Info would be usefull.
>
Received on Tue Aug 04 1998 - 20:08:36 BST

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