Re: IIgs with unknown ADB device...?

[lee@lcremeans.erols.com (Lee Cremeans)]

In article <labelas-2104000113180001@psl1b30-120.pbc.adelphia.net>, Labelas
Enoreth wrote:

Today I came across a IIgs which has this unusual item
>plugged into it's ADB port between the keyboard and the computer. It
>appears to be a 'dongle' of some kind, like what I've seen for some of the
>more expensive software. It basically looks like a short (1") adb cable
>that plugs into the back of the computer, ending in a small rectangular box
>that has a second ADB port on it to chain through, presumably. I took it
>apart out of idle curiousity and there isn't much to it...the board itself
>has �MSSI ADB REV H... There appears to be an oscillator(12mhz?),
>two...uhm, resistors I think, and a large square chip which has on it:
><large 5 or S>MSSI20V8 22368069331KA ADB REV P1 �INTEL80�SIG87

That's a Signetics-made 80c31-ish microcontroller set up as an ADB
interface. It more than likely has some custom programming in its ROM.

>and a smaller chip with a logo like two waves and
>33AE
>93C46
>MB

This is a National 93C46 64kx16 serial EEPROM.