Subject: Macintosh PDP-8/E Simulator

From: [email-masked] (Bernhard Baehr)
Date: Fri, 17 Feb 1995 10:04:27 GMT

I announce the availability of the final version 1.0 of my simulator
for the DEC PDP-8/E minicomputer running on the Apple Macintosh 
computer. The simulated machine is a PDP-8/E with 4K words of memory 
and an ASR 33 console teletype. Optionally a MC8-E Memory Extension 
(with up to 32K words of memory), an EAE, an auxiliary ASR 33 teletype,
a high speed paper tape reader and punch, a RK8-E disk system, a 
LP8-E line printer and a Real Time Clock can be attached to the 
simulated PDP-8/E.

The simulator is based on the PDP-8/E emulator of Bill Haygood. It
is known to run on a wide variety of 680x0 and PowerPC Macintoshs
running System 6.0.4 to 7.5. (Probably it runs on any Macintosh with 
System 4.1 or better and 128K ROMs.) The current version of the
simulator does not contain native PowerPC code. On the fastest 
68040 Macintoshs the simulated PDP-8/E runs nearly with the speed
of a hardware PDP-8/E. 

The simulator provides a comfortable user interface for running,
writing and debugging PDP-8 software. For each device, there is a
separate window which displays the internal state of the device
(e. g. register and - disassembled - memory content). Register and
memory content can be modified by mouse clicking. Other features of
the simulator are breakpoints, break opcodes, single step execution,
a trace mode for the PDP-8/E and much more. The simulated ASR 33 
teletypes provide all comfort of Macintosh text editor windows. 

There is no manual for the PDP-8/E Simulator, but the program has
full Balloon Help support, and there is a help window which gives
detailed information about the PDP-8 instruction set implemented by
the simulator and hints for operating the simulator.

Anybody who wants to get the simulator may ask me to send him a copy 
of the program by E-mail.

Bernhard Baehr
[email-masked]