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From: aiiadict@gmail.com
Newsgroups: comp.sys.apple2.programmer
Subject: Re: standard interface to aux RAM or RWIII RAM?
Date: Fri, 11 May 2012 17:42:22 -0700 (PDT)
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On Friday, May 11, 2012 9:31:56 AM UTC-7, aiia...@gmail.com wrote:

>=20
> for instance, where is the quit code???
>=20


pg 63, beneath apple Prodos supplement for versions 1.0.1 and 1.0.2


"quit code:  resides in alternate 4k bank ($D000) and is executed at=20
$1000"


I'm trying to figure out the entire memory map, at work without an
emulator.

there is main RAM, then AUX RAM.  also LC ROM.

where does this alternate 4K bank of RAM exist at?  in the aux
bank 0?

according to the RWIII manual, :  chapter 7 pg 45

"
The bank select register is mapped into the He=92s memory space at location=
 $C073
(49267). The programmer can select one of 48 valid banks by writing the ban=
k number
into this location. (Chapter 6 provides the bank numbers for various memory
configurations.) Once you make the bank selection, soft switches built into=
 the //e
firmware function as they normally would. This allows data transfer from ma=
in memory to
auxiliary memory and vice versa.
Data transfers between banks of auxiliary memory must be done in two stages=
. The
data transfers to main memory first and then from main memory to the desire=
d bank(s).
You can also transfer, one byte at a time, using the Accumulator.
Bank 0 in RamWorks always contains the text information for the 80 column d=
isplay
and the graphics information for the double high resolution display. This b=
ank must be
active whenever the program updates the display screen"