Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines
Archive of the
Manic Miner & Jet Set Willy Yahoo! Group
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Message: 3779
Author: andrewbroad
Date: 09/10/2003
Subject: Erratum (Re: Jonathan Harston's site)
andrewbroad wrote:
>And 40704-40959 (the above addresses only give 5 extra rooms).
> 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.
> * 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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