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PDP-8-E Simulator
PDP-8-E Simulator
5.0
PDP-8-E Simulator free download for Mac

PDP-8-E Simulator

Version 2.4

Apple Mac DEC PDP-8/E emulator.

Free
FreeAbsolutely Free

PDP-8-E Simulator overview

PDP-8/E Simulator is an emulator for the DEC PDP-8/E minicomputer running on the Apple Mac. The simulated machine is a PDP-8/E with 4K words of memory and optionally a KM8-E Memory Extension (with up to 32K words of memory) and a KE8-E Extended Arithmetic Element. I/O devices are implemented as plugin modules, and plugins for an ASR 33 Console Teletype, an ASR 33 Auxiliary Teletype, a PC8-E High Speed Paper Tape Reader and Punch, a RK8-E Disk Cartridge System, a LP8-E Line Printer and various types of Real Time Clocks are included in the distribution of the simulator. There is also a KC8-EA Programmer´s Console plugin enabling the user to operate the simulator (nearly) like a hardware PDP-8/E, including single step execution on memory cycle level.

What’s new in version 2.4

Updated on Feb 23 2022

  • PDP-8/E Simulator 2.4 now has a Music Player plug-in that makes audible the tunes played by the PDP-8 Music Playing Program.
  • On the OS/8 System Disk of the simulator distribution you find MUSIC.SV and on the second partition the known music files.
  • For PDP-8 newbies, the quickstart for the simulator describes how to play music, see https://www.bernhard-baehr.de/pdp8e/quickstart20.html#music.
  • Bug fixes: the simulator ran a little bit too fast on Macs with Apple silicon (caused by rounding errors converting Mach absolute time to nanoseconds), causing the audio buffer to overflow and the music to skip. And with the TC08, an UI update notification was posted too often when the PDP-8 executed CAF in high frequency, causing a lockdown of the UI. A half-dozen other minor bugs are eliminated, and some pixel alignments in the UI were optimised.
  • A thirty year old bug with the rarely used microprogrammed operate instructions 7264 (CLA CMA CML RAL), 7266 (CLA CMA CML RTL), 7270 (CLA CMA CML RAR) and 7272 (CLA CMA CML RTR) was fixed: until now they did not perform the CML.

Information

License

Free

Size

28.3 MB

Downloads

4735

App requirements

  • Intel 64
  • OS X 10.11.6 or later
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Phoenixdownunder
Phoenixdownunder
Dec 9 2019
2.2
5.0
Dec 9 2019
5.0
Version: 2.2
This is a really cool piece of fun yet serious software! Brilliant. Ahhh, thems was the days!!
arizdave
arizdave
Dec 9 2019
2.2
5.0
Dec 9 2019
5.0
Version: 2.2
Great memories. I am an alumnus of MIT and was one of the "8E" electronic designers working out of the "mill" in Maynard MA in the "60's". All us engineers and DEC President Ken Olsen were ahead "of the curve" back then.
Whisperquiet
Whisperquiet
Nov 6 2015
2.0.2
5.0
Nov 6 2015
5.0
Version: 2.0.2
Just fantastic! Brings back so many memories for me with Digital :o)
Aaron-Elkins
Aaron-Elkins
Dec 9 2014
2.0
5.0
Dec 9 2014
5.0
Version: 2.0
How cool it is.
Dylan-Mc
Dylan-Mc
Dec 9 2014
2.0
5.0
Dec 9 2014
5.0
Version: 2.0
This is an amazing resource - the PDP-8 was a real computer, but simple enough to comprehend. It was commonly used in "machine structures" curricula while those machines survived. Now they're really hard to find (I see one exactly like pictured here, in very poor condition, on eBay for $5,000), so it's great to have this simulator available. I think I'll work on a lesson plan or two based on this amazing tool. If you're curious about learning more - this hilarious video is a good place to start: http://acad.depauw.edu/dharms_web/pdp11/
Free
FreeAbsolutely Free
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