Date   : Fri, 15 Jan 2010 20:22:37 -0000
From   : jumbos.bazzar@... (Mark Haysman)
Subject: Testing sideways RAM

> How can I quickly test it, ie. blast some arbitrary data onto it and then 
> read it back?

MODE 0
*H..              (to fill the screen with something)
*SRWRITE 3000+4000 8000 6
CLS
*SRREAD 3000+4000 8000 6

See if it is readable, substituting the 6 for whatever bank you want to 
test. Not a definitative bit test, but it does the trick to see if the RAM 
is alive.

Mark.