Re: Prince of Persia for ProDOS? was Re: QIX for ProDOS

[BLuRry <brendan.robert@gmail.com>]

On Wednesday, October 31, 2012 12:09:54 PM UTC-5, Steve Nickolas wrote:
> On Wed, 31 Oct 2012, BLuRry wrote:
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> 
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> > Don't go too much further without looking at Mechner's notes.  He lays 
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> > out memory map usage pretty clearly.  This can be extremely useful in 
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> > mapping out loader behavior.
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> >
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> > http://jordanmechner.com/wp-content/uploads/1989/10/popsource009.pdf
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> >
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> > -B
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> >
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> 
> 
> Downloaded it back in April.
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> 
> 
> I'm aware of some of the technical stuff.
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> 
> 
> The table says there's 48K of code and 8K of buffers.  That might be a 
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> problem, given that both the graphics pages are used ("Screen memory 
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> 16K").
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> 
> 
> -uso.

Both hires pages are in use, but I think that PoP's buffers can be moved around pretty easily.  Mechner didn't use any evil tricks that I could find.  I didn't even see many hints of self-modifying code to be honest.  It should be possible to reassemble PoP in a way that relocates its buffers to non-contiguous places, such as areas of the shape table that are not needed at the time.  Or auxmem.

To be honest, shoving lookup data into a slinky ram card is getting more and more temping as I think about it.  ;-)

-B