🚀 go-pugleaf

In <31e1a864.93054184@nntp.world.net> SamKenny@cit.com.au (Sam Kenny) writes:

>1.     I've read in a FAQ that these machines came with only 4MB, but
>there are third party boards that allow more memory,

yes - plug in daughter boards that sit on top of the motherboard.
Allows 0, 4 or 8 Mbyte upgrade (in addition to the 4 Mbyte on the motherboard)

>could someone let me know who made them,

I believe "Parity" made the boards (although my memory is getting rusty)

>how this works,

Pull out two chips on the motherboard, replace with ones supplied by the
board manufacturer.  Pull out one big chip (square one - are they called
ZIF (zero insertion force) ??) and plug the board in it's place, then
plug the chip you just removed into the board.

The replacement chips set the machine up to be able to use the memory
and I think the big chip is the MMU - hence the memory "hangs off" it.
Somebody will correct me if I am wrong.  I might still have the doco
at home (but I doubt it).

>and whether they are still floating around?

I threw some out a couple of years ago :-(
I imagine somebody has some, but I doubt that they can be sourced new.

John Barlow (used to have a Sun 3/50 with 12 Mbytes of RAM)