https://github.com/isysxp/esp32-pdp11-ffs

Running RT11 on the ESP32 with FFS file system.
https://github.com/isysxp/esp32-pdp11-ffs

esp32 ffs pdp11 rt11

Last synced: 15 days ago
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Running RT11 on the ESP32 with FFS file system.

• Host: GitHub
• URL: https://github.com/isysxp/esp32-pdp11-ffs
• Owner: Isysxp
• Created: 2024-05-26T17:01:38.000Z (7 months ago)
• Default Branch: master
• Last Pushed: 2024-09-14T16:19:47.000Z (4 months ago)
• Last Synced: 2024-09-15T02:11:53.414Z (4 months ago)
• Topics: esp32, ffs, pdp11, rt11
• Language: C++
• Homepage: https://github.com/Isysxp/ESP32-PDP11-FFS
• Size: 2.15 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ESP32_PDP11_FFS - A PDP11/40 with RK05 disk in flash.




This is a modified version of a PDP11/40 emulation at https://github.com/Isysxp/PDP11-on-the-M5-Core


This app requires an ESP32 processor with at least 512K of PSRAM.


The current build is targeted for the Adafruit QT Py ESP32-S3 board.


This provide a complete PDP11/40 with an OS on a board the size of a postage stamp!


https://learn.adafruit.com/adafruit-qt-py-esp32-s3/overview


The build enviroment is for the current Arduino IDE V 2.3.1 or the VisualMicro plugin for Visual Studio.


The critical libraries required are:


ESPTelnetStream (https://github.com/LennartHennigs/ESPTelnet)


and Espressif Arduino-esp32 (https://github.com/espressif/arduino-esp32) V 2.0.17.


Disk images: I have included a 'reasonably' complete build of RT11 V5.03 on an RK05 image.


This can be loaded into the Flash File System as a FAT image. The upload tool can be found


in either Arduino IDE 1.8 or via the VisualMicro plugin for Visual Studio.


The app provides 1 telnet stream linked to a DL11 serial port mapped at 2 Unibus addresses: 0775610 and 0776500 Vector:0300.


(Do not try to use both at once!)





Ian Schofield April 2024





Note: With refernce to the flash partition table (Should be set to No OTA 1MB app 3MB flash).


Using ESP-IDF release >= 3.0 results in an app size > 1048576 bytes. This will overflow the app flash.


Please use ESP-IDF release 2.0.17 to correct this error.





Ian Schofield August 2024