1.1B STATUS and Project Completion

DEC RL01/RL02 FPGA based Disk-Emulator

The operation of the RL01/RL02 Emulator is best viewed with a VIDEO via YouTube, however, in the first version, based on the DE1-Board.

In cooperation with Computer Museum Muenchen
Development and completion of a PCB board for the RL01/RL02 disk emulator

Further informations:
A detailed description, User Manuel: README
For DE10-Lite user , a start-up Manuel: Getting_Started
3 bootable RT-11 RL-emulator images ( dl0,dl2,dl3): emulator-images
Circuit diagram and layout information:
Circuit diagram and layout information: RL_Emulator_v2_2
For questions, please send an e-mail to:

Firmware, Flash and c-programs

The emulator interface works with any of the following FPGA boards.
The entire software was completed with Quartus version 16.1.
For each FPGA board a
flash folder is available to start the respective board immediately.
For a quick start, a manual is included as a readme file.
Please note: The entire project is
open source and therefore a project folder is also available.
This allows you to flash the firmware with a jic-file or pof-file (DE10). The c-programs can be edited or modified via
eclipse-nios2 without problems. However, the firmware/verilog source programs are missing. We are happy to provide these programs by e-mail. We just want to know who gets these programs and how the plans are for using all these firmware sources. Cooperation is really important to us!
Please send e-mail to:
RLEMU@cm-muenchen.de or info@pdp11gy.com

My recommendation :
MAX10 / DE10-Lite Implementierung
64MB memory, emulates simultaneously up to 4 RL01 or RL02 disk drives.

Flash folder: de10_flash
Project folder:

BeMicro CV Implementation
128MB memory, emulates simultaneously up to 4 RL01 or RL02 disk drives, sorry, not available at the moment ?? (MAY 2017)

Flash folder: BeMicro_flash
Project folder:

DE0-Nano Implementation
E16MB memory, emulates 1 RL01 or RL02 disk drive

Flash folder: DE0_Nano_flash
Project folder:

DE1 Board Implementation
emulates only 1 RL01 disk drive

Our emulator interface also works with this relatively old DE1 board but there are some limitations due to the only 8MB SDRAM memory: - Only support of one RL01 disk drive. RL02 support not possible. - No FAT32 support for the SD-Card and incompatible file format. For further questions about this DE1 configuration, please send an e-mail.

DE0-Nano-SoC Board Implementation
This is the configuration based on the DE0-Nano-SoC board. It will probably be available in early of 2018 in the first version.

It is the ideal board because it can also be used for other purposes such as PDP-11 and PDP-8 emulators. However, a lot of issues must be new developed. A NIOS II CPU with the existing C-code is very difficult to implement here, so everything has to be ported to the ARM Cortex-A9 CPU environment. If someone has already experience with this environment I would be glad about a contact very much. Perhaps it is also an interesting challenge for a student? Cooperation is very important.

In the end, this was my last wire wrap work.