Date   : Wed, 15 Mar 2006 22:25:32 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Model B compatibility on a Master

>Message-ID: <002701c64771$089029e0$0301a8c0@...>
 
"David Harper" <dl.harper@...> wrote:
> *FX 200,2 will cause most memory to be cleared on Break (main memory,
> shadow screen, MOS private RAM and filing system workspace). It will NOT
> cause SW-RAM to be cleared. If this is still a problem, you can *UNPLUG
 
It does on the Master Compact and on MOS 3.50
 
Horrible horrible horrible!!!!
 
The first time I tested HADFS on a Master Compact it loaded itself
into sideways RAM nicely, then performed a power-Reset to
reinititialise the machine - and HADFS had vanished 'cos the SRAM
had been cleared.
 
Grrrrrrr.
 
> the SW-RAM banks (banks 4 to 7). (You will, of course, need to *INSERT
 
*SRWRITE 0+9 8000 4
*SRWRITE 0+9 8000 5
*SRWRITE 0+9 8000 6
*SRWRITE 0+9 8000 7
 
will overwrite enough of the ROM header to make the contents
invalid. I use +9 just because it's quicker to type. (Unless
&0000-&000A *just happen* to have a valid ROM header in them.)
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
BBC BASIC for 30+ platforms - http://mdfs.net/Software/BBCBasic