Date   : Mon, 21 Dec 2015 00:23:40 -0000
From   : profpep@... (Mike Pepper)
Subject: Master Cartridges

  From a bit of searching, I gather that sticking a 62256 into a standard
master cartridge should "just work" to make it sideways RAM...


  Has anybody got a simple circuit to battery back-up this?  Something I 
can throw together with bits from my junk box?  I seem to recall a circuit
for the B many years ago, but I can't find it now... I'm assuming something
similar would work on the Master...




  This will do the job, in one go, but might be too thick to fit the slot,
unless you removed the original socket. I has 10 years data retention.
  http://uk.rs-online.com/web/p/nvram-memory-chips/0132772/

  Mike