Re: A86: FindPixel in 84 cycles and 19 bytes!
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Re: A86: FindPixel in 84 cycles and 19 bytes!
On Sat, 9 Aug 1997 Dan Eble <eble@cis.ohio-state.edu> writes:
>> They are normally scratch for an ASM program on the TI-86, aren't
>> they? That's what I was told,
>
>Who told you? There's nothing in the info that TI has released that
>says that. (Nothing I've seen, anyway.)
On ticalc.org is a file called "86ports.txt". It contains (among other
things) the following information:
...
------------------------------------------------------------------------------
port 5 - Page change at $4000-$7FFF
------------------------------------------------------------------------------
port 6 - Page change at $8000-$BFFF
------------------------------------------------------------------------------
These two ports are very similar, the only thing to remember is this:
port 5 memory area = $4000-$7FFF (second 16K of memory)
port 6 memory area = $8000-$BFFF (third 16K of memory)
...
RAM page info - description
$00 - The page permanently at $B000-$FFFF, this contains all of the
system
- variables, I think, and then space for running asm programs,
then
- the stack, then video memory
$01 - page in use when asm program is called, I think most of it is
not - used, so that us people making asm programs won't mess
up things ;)
$02 - The start of user memory, starts with xStat, and all those
$03 - More user memory
$04 - More user memory
$05 - More user memory
...
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