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Message: 4238

Author: jgh@arcade.demon.co.uk

Date: 25/05/2004

Subject: Taxonomy of JSW-engines

 

> Message-ID: <c6p892+uq7p@...>

> john_elliott_uk wrote:
> > See <http://www.seasip.demon.co.uk/Jsw/taxonomy.html> for all the
> > JSW engines I can think of at the moment. And If you can think of
> > any sane naming scheme which covers all of these, do let me know.

Strickly speaking, the JSW patch allows 128 rooms, not just 72. It's just
that some of the room locations are occupied by other code and/or data.
If, for example, the sprite and guardian tables were moved you could use
rooms 100 to 127. The standard sprite set has nothing at &B3xx, so you
could put room 113 there instead.

andrewbroad <no_reply@yahoogroups.com> wrote:

> > jgh@a... wrote:
> >> How about xx, giving:
> >> JSW48x64x256 - The standard JSW

Or maybe rd, omitting values
different from the original JSW48, giving:

jsw48r6d8 (or jsw48)
- 6-bit rooms (64 rooms), 8-bit room data (256 bytes)
jsw48r7d8 (or jsw48r7)
- 7-bit rooms (128 rooms), 8-bit room data (256 bytes)
jsw128r8d8 (or jsw128r8)
- 8-bit rooms (256 rooms), 8-bit room data (256 bytes)

--
J.G.Harston (JGH BBC PD Library) 70 Camm Street, Walkley, SHEFFIELD S6 3TR
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