Re: CP/M card in A2 Platinum

[gen_hp_gooberman@my-deja.com]

Mine might have been a RamFactor.  All I can remember now
is that it was a socket 7 card, and had a perverse number
of RAM chips on it.  The guy I traded it to was my CIS teacher
for some classes, and he wanted to get back into
Pascal programing.  I gave him a pair of AIIe', a IIc, and IIgs that
I got in a school surplus sale, then I think he picked up
a couple of more IIe's at the college that were still running
around, including his old personal machine from way back.
At the moment, I felt he could get more use out of the
RAM card than I could, hense the trade for the clock.
Will have to keep an eye out for a no slot clock.
Gen. Hiram P. Gooberman, esq.


In article <1dvxmvn.1u1f3gsvokbzwN@dempson.actrix.gen.nz>,
  dempson@actrix.gen.nz (David Empson) wrote:
> <gen_hp_gooberman@my-deja.com> wrote:
>
> > Z-80=CP/M card.  I have the Super Serial card.  What
> > does a "slinky" ram card look like?
>
> Applied Engineering's one says "RamFactor" on it in big letters.
> Apple's one is a bit more anonymous, but the distinguish
characteristics
> include:
>
> - Standard slot card (50 pins), not IIe auxiliary slot (or IIgs RAM
> slot).
> - It has a large socketed PLCC chip.
> - 32 RAM chips (or positions for them).
>
> > No slot clock?  How is that done?
>
> It sits under a ROM (usually one of the firmware ROMs on the
> motherboard).  The driver accesses the clock by doing a specific
pattern
> of reads to the memory area of the ROM, which is recognised by the no
> slot clock.  The clock then takes over for accessing the time
registers
> (another 64 read operations, with different addresses being used to
> "write" data using read instructions).
>
> > Don't have 1.44 meg drive card.  Were there even 1.44 externals?
>
> Yes.  I have one.  (It is an official Apple drive, labelled "Apple
> SuperDrive".)
>
> --
> David Empson
> dempson@actrix.gen.nz
> Snail mail: P.O. Box 27-103, Wellington, New Zealand
>


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