My PDP-11 related electronic projects on My PDP-11 Projects

As already mentioned the hardware also supports a RLV12 emulation.

The odyssey of disk emulators has finally gotten to an end.

In the following page you can find links to all resources mentioned and also download links for the KiCAD Project, the CPLD Design files, CPLD JEDEC files, source code and hex file of the microcontroller firmware.

The microcontroller provides a command line interface with a lot of commands.

Basic operational background of the hardware.

In this page I will show the steps to use a minimal setup with startup configuration and just disk images copied to a FAT-32 formatted SD-Card.

Before you can use the MSCP Emulator you need to prepare an SD-Card.

In this web page I will describe the how to install the Q-Bus MSCP Emulator and also how to build your own MSCP Emulator.

The MSCP Emulator is a disk controller that emulates the MSCP protocol and connects the PDP-11 with a SD-Card where the disk images, that are used as the emulated disks, are stored as normal files.

Overview of the MSCP Emulator Project.

The last piece for a fully working PDP-11 is a line time clock.

In this article I will show the first feature using the MCU, a boot ROM.

Next step is to arm the interrupts.

The next IO we will implement on the MCU IO card are serial line units.

In the following I will show an expansion card which uses an ATF1508 CPLD and an AVR128DB64 microcontroller.

Forth exists as well as a stand-alone program für the PDP-11 and to my surprise, it does not make use of interrupts, therefore it can be loaded to the DCJ11 SBC without an expansion board or additional hardware.

Only a console and ODT is a little dull, so why not add a second serial interface and some EERPOM to make the DCJ11 SBC a bit more useful.

Now as all pieces have been put together we are ready to boot RT-11 on the DCJ11 SBC using SLUA and a TU-58 emulator.

A nice feature to the DCJ11 SBC would be programmable IO.

For those without the possibility to get their hands on a DC319 UART I have created a small CDP6402 adapter to plug into the socket for the DC319.

Detailed building instructions for the SBC giving a step by step description of each individual step.

Now as the DCJ11 SBC is completed what can you do with it?

Instead of using the six TTL logic devices you can use a GAL16V8.

The DCJ11 SBC is prepared for more RAM and also provides the necessary logic to decode non-existing memory address

The DCJ11 SBC is equipped with a edge card holder for an expansion card.

For more fun, projects or any advanced feature you would develop your own PCB that goes into the card edge slot, the expansion slot.

In this article I go more into the details of the circuit used for the DCJ11 SBC

Eurocard sized Single Board Computer using a DCJ11 which implements the basic features of a breadboard PDP-11/Hack with an expansion slot that allows for further enhancement up to a fully functional PDP-11 running RT-11.

PDP‑11/Hack de Luxe is an Eurocard sized Single Board Computer using a DCJ11 which implements the basic features of a breadboard PDP‑11/Hack with an expansion slot that allows for further enhancement up to a fully functional PDP‑11 running RT‑11.

The DCJ11 was the last PDP‑11 processor developed by DEC.

A PDP-11 is more fun to use, when you have more memory, especially when your system supports 22-bit addressing.

In this chapter I go into the details of the CPLD design

The following describes the schematics, I use Eagle as CAD

In the meantime I have updated the CPLD interface and the MCU firmware.

What is the RLV12 V2.0 Emulator, how das it work and how it can be used.

The RLV12 Emulator comes with a serial port to control various features.

This article describes the new RLV12 Emulator V2.0.

I have been working on this RTOS for quite some time.

The RLV12 Emulator has a built-in logging function that stores all controller activities in a circular buffer in the RAM of the microcontroller

Emulation takes place in the microcontroller used in the RLV12 Emulator V2.0.

In the following page I will describe in details the building blocks and functions used to build version 2.0 of the RLV12 Emulator

More than four years, since the first release of the RLV12 Emulator V2.0 firmware and CPLD design files have passed.

The RLV12 V2.0 Emulator consists of two boards, the main board that plugs into the Q-Bus and a break-out board with all required interfaces.

Over the years I have changed the way I develop my applications especially how I create programms for my Atmel MCUs.

After creating the RLV12 Emulator V2.0 for the Q-Bus I decided to build as well a new RLV12 Emulator for the PDP‑11/Hack.

I often have the need for prototyping certain features or ideas using either a CPLD or an MCU.

This is the updated RLV12 Emulator with a break-out board for all interfaces.

All external interfaces, including the SD-Card slot are now brought to a break-out board that can be installed at a convenient place of your installation

All external interfaces, including the SD-Card slot are now brought to a break-out board that can be installed at a convenient place of your installation

The following gives some guidelines how to build the Emulator February 2020: Added some information regarding programming the MCU and CPLD