Date   : Fri, 18 Sep 2009 23:13:11 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: ROMS is MOS 3.50 that can be exchanged

"Mark Haysman" wrote:
> >> What ROMs can be substituted for different ones in MOS 3.20 and MOS 3.50?
> >
> > The ever useful MDFS does have a bit on MOS 3.20 at the bottom of this
page:
> > http://mdfs.net/Info/Comp/BBC/SROMs/MegaROM.htm
> 
> Thankyou, I had looked and expected a link from "BBC/Master" and not found
> anything, didn't look for the "info" link at the bottom.
 
Ah. Software->ROMs and Hardware->ROMs both pointed to ROM images.
Hardware->ROMs now points to the above area. (Give me the usual
time to actually upload it!)
 
> So from that it looks like in 3.20, View, Viewsheet and Edit can be
 
Everything except ROM 15 and the last &600 bytes of ROM 14 can be
completely replaced.
 
> replaced - what about MOS 3.50? Can the same be said of that version?
 
In MOS 3.50 ADFS and DFS share code and need to be 4 ROM slots
apart from each other. If you remove the DFS, then ADFS will crash.
I'll dig around and document MOS 3.50 a bit more.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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