Path: utzoo!attcan!uunet!comp.vuw.ac.nz!actrix!tornado!sideways!terros
From: terros@sideways.gen.nz (Dave Sainty)
Newsgroups: comp.sys.acorn
Subject: Re: 8-bit.  mode in elite.
Message-ID: <3ouoV1w163w@sideways.gen.nz>
Date: 12 Jan 91 14:44:01 GMT
References: <quan.663387431@sol>
Organization: Sideways Bulletin Board, Lower Hutt, New Zealand.
Lines: 27

quan@sol.surv.utas.oz (Stephen Quan) writes:

> I have made mode 8 from the Advanced Users Guide, and know would like to
> make a black and white mode similar to the top part of the screen in Elite.
> Basically it was 32x32(?) characters, (if the black and white part were to
> fill the screen).  I been modifying mode 8, but still could not get anything
> like it.
> 
> Reason of use:  Each line takes 256 bytes of storage, which makes it simpler
> to address bytes for graphics.

ok, this is untested, but I think I've got what you want here. 
register 1 is the chars displayed register. in mode 4, 1 char is 1 byte, 
so no problems there. just do:
?&fe00=1:?&fe01=32

to do hardware scrolling in your new mode, you will have to set the 
addressable latch to 8K, which is luckily possible, because it's mode 6 
size.

?&fe40=12:?&fe40=5

this may be wrong, I suggest you disassemble from &c300 (a=mode) to 
verify this, if you can.
or, someone else could post corrections.

Dave.