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\author{APM Manual pages}
\title{APM Address map}
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\section{Preamble}
This list of addresses is for general guidance only. There
are plenty of exceptions to most of the addresses listed here. \hspace{ 0.6 in} JHB

\small\tt \begin{verbatim} Low      High

000000---000FFF  Local Bootstrap EPROM (Switchable to RAM)
001000---003FFF  Local RAM             (Switchable to EPROM)
004000---07FF9F  Unused (Available for local M68000 bus expansion)

070000---071FFF  Big Disc              (Bravo & Charlie)
07FF40---07FF5F  Qsart
07FF60---07FF7F  Qsart
07FF80---07FF9F  Qsart
07FFA0---07FFBF  Qsart
07FFC0---07FFDF  Qsart                 (Standard)
07FFE0---07FFEF  Mini Disc
07FFF0---07FFF7  Mouse
07FFF8---07FFFB                        (?)
07FFFC---07FFFF  Ethernet Station Interface


080000---0FFFFF  Address map register 0
100000---17FFFF  Same as 000000-7FFFFF
180000---1FFFFF  Address map register 1
200000---27FFFF  Same as 000000-7FFFFF
280000---2FFFFF  Address map register 2
300000---37FFFF  Same as 000000-7FFFFF
380000---3FFFFF  Address map register 3

Local M6800 Bus address map (starts at 400000)
400000---40002F  Unused
400031(2)40003F  Mains switch sense register: Bits 0-3 in low nibble of low byte
400040---4000BF  Unsafe to access      (why?)
4000C0(2)4000CE  Unused
4000C1(2)4000CF  ACIA                  (low bytes)
4000D0---4000FF  Unsafe to access      (why?)
400100(2)40010E  PTM                   (high bytes)
400101(2)40010F  Unused
400200(2)40021F  JHB Real-Time systems interface
400214---47FFFF  Unused


480000---4FFFFF  Address map register 4 (?)
500000---57FFFF  Same as 400000-47FFFF
580000---5FFFFF  Address map register 5 (?)
600000---67FFFF  Same as 400000-47FFFF
680000---6FFFFF  Address map register 6 (?)
700000---77FFFF  Same as 400000-47FFFF
780000---7FFFFF  Address map register 7 (?)

800000---8FFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 0
900000---9FFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 1
A00000---AFFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 2
B00000---BFFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 3
C00000           L1.5 Framestore (old position)
C00000---CFFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 4
D00000---DFFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 5
E00000           L1.5 Framestore 
E00000---EFFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 6
F00000---FFFFFF  System Bus RRR00000-RRRFFFFF, RRR = Map Reg 7
\end{verbatim}\rm  \normalsize 

Note:

A (2) in brackets indicates that the range comprises every second address only.

\vspace{.75in} view:addressmap printed on 16/02/89 at 10.17

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