Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines
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Message: 3779
Author: andrewbroad
Date: 09/10/2003
Subject: Erratum (Re: Jonathan Harston's site)
andrewbroad wrote:
Jonathan Harston's extension allows a 48K JSW game to have up to 72
rooms:
* Addresses 38656-38911 and 42752-43776 are unused, giving space
for 6 extra rooms.
And 40704-40959 (the above addresses only give 5 extra rooms).
* If the colour-code system is bypassed then there is space for two
more extra rooms at 39680-39935 (colour-code sprites and
attributes) and 40448-40703 (colour-code instructions).(It is not possible to use addresses below 32768 because 0-16383
are ROM, 16384-23295 are video RAM, and 23296-33791 are used by JSW
as screen-buffers.)[ http://www.mdfsnet.f9.co.uk/Software/JSW/JGH/Docs/Rooms.htm ]
--
Dr. Andrew Broad
http://www.geocities.com/andrewbroad/
http://www.geocities.com/andrewbroad/spectrum/
http://www.geocities.com/andrewbroad/spectrum/willy/
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