Date   : Fri, 26 Jun 1998 14:38:28 +0100 (BST)
From   : Rich <rst20@...>
Subject: Re: BBC Master

The point about copying parts of the OS1.20 rom is one I'd forgotten about
- usually incompatible games are trying to access a table for calculating
screen positions, but it can be reproduced extremely simply by running the
following code beforehand:

P%=&C375
FOR n%=0 TO 31
a%=n%*640
[OPT2:EQUB a% MOD 256:EQUB a% DIV 256:]
NEXT
?&E0=&75:?&E1=&C3

(Actually the MOD and the DIV might be the other way round).

That should fix problems with Frak, Castle Quest, and probably loads more.

Cheers,
Rich
-- 
+-------------------------------------------+-------------------------+
| Richard Talbot-Watkins,                   | Tel: 01223 500997       |
| St Catharine's College, Cambridge CB2 1RL | E-Mail: rst20@...       |
+-------------------------------------------+-------------------------+