Date   : Tue, 30 Aug 1994 16:26:25 BST
From   : Rycharde Hawkes <rych@...>
Subject: Re: NOTHING ELSE WORKS...!!!!

James Fidell wrote:
> > SNAPPER and PLANETOIDS need BCD. REVS (ha ha) ... wow the screen is a MESS!
> > WORDWISE PLUS seems to work but only after i forbade my emulator to write
> > to hi memory (0x8000 to 0xffff) unless poking SHEILA (excuse me...). a lot
> > of ROMs attempt to corrupt themselves because of the popularity of sideways
> > RAM. and before you ask... no, i didn't try ELITE!!!
> 
> Revs uses a multi-mode screen (like Elite), apparently.

It rolls its sleeves up and plays with the video timings on the fly to get
the split screen.  The thought of emulating that boggles my mind.  I 
think Acorn User once did an article (and source code, of course) on
the technique.

Rych

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Rycharde Hawkes                               Virtual Environment Laboratory   
email: rych@...               University of Edinburgh
Tel  : +44 31 650 3426                Fax  : +44 31 650 6534

  "Rome wasn't built in a day, but if they'd just worked harder..."
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