Re: What are these Apple II chips?

[dempson@actrix.gen.nz (David Empson)]

Sam Latella <powergs@macgui.com> wrote:

> Hopefully someone can help me with the list of Apple II/IIgs chips.
>
> Here are the numbers
> 
> 342-0108-B
> 342-0105-B
> 342-0106-B
> 342-0107-B

No idea about the above lot.

> VL65C816 - IIgs Cpu
> 341-0737
> 341-0748

The above two ring a bell. A little research reveals they are the
standard FC-FD and FE-FF ROMs from a ROM 3 IIgs. I can't think why you
would have them as loose chips unless someone depopulated a ROM 3 board.
The ROM 3 never had any firmware updates, but there were some early
prototypes out in the wild with different firmware revisions.

> I think these are early Mac chips
> 343-0002-1
> MC68881RC168

The 68881 is a floating point coprocessor by Motorola, for use with a
68020 or 68030 processor. In a Mac it could be used in at least some of
the Mac II, IIx, IIcx, IIci, SE/30 and similar age models. The 68040 had
it built in, so later Macs didn't need it.

> Marathon 030 board

I'm guessing the "030" refers to a 68030 processor. Google "Marathon 030
board" (without the quotes) and the first link is an InfoWorld article
about it from 1988.

> AAA1M300J-08 - early mac memory?

Google and wading through the results found this one:

http://www.seekchip.com/icstock-A/AAA1M300J-08.html 

which reveals it is a 16 megabit static RAM, organised as 1Mx16 or 2Mx8,
running from a 3V power supply.

It might have been used for something like an audio buffer memory in a
Mac.

-- 
David Empson
dempson@actrix.gen.nz