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https://github.com/wfjm/w11

PDP-11/70 CPU core and SoC
https://github.com/wfjm/w11

fpga pdp-11 pdp11 retrocomputing vhdl

Last synced: 3 months ago
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PDP-11/70 CPU core and SoC

Host: GitHub
URL: https://github.com/wfjm/w11
Owner: wfjm
License: gpl-3.0
Created: 2016-10-15T16:42:04.000Z (about 8 years ago)
Default Branch: master
Last Pushed: 2024-06-10T19:47:26.000Z (5 months ago)
Last Synced: 2024-06-30T16:53:12.740Z (5 months ago)
Topics: fpga, pdp-11, pdp11, retrocomputing, vhdl
Language: VHDL
Homepage: https://wfjm.github.io/home/w11/
Size: 7.4 MB
Stars: 118
Watchers: 15
Forks: 18
Open Issues: 15
Metadata Files:
- Readme: README.md
- License: License.txt

Awesome Lists containing this project

README

        # w11: PDP 11/70 CPU and SoC

[![ci](https://github.com/wfjm/w11/workflows/ci/badge.svg)](https://github.com/wfjm/w11/actions/workflows/ci.yml)

[![Coverity Status](https://scan.coverity.com/projects/16546/badge.svg?flat=1)](https://scan.coverity.com/projects/wfjm-w11)

[![Commits since latest release](https://img.shields.io/github/commits-since/wfjm/w11/latest.svg?longCache=true)](https://github.com/wfjm/w11/releases)

### Overview

The project contains the VHDL code for a **complete DEC PDP-11 system**:

a

[PDP-11/70](http://www.bitsavers.org/pdf/dec/pdp11/1170/EK-KB11C-TM-001_1170procMan.pdf)

CPU with a memory management unit, but without a floating point unit,

a complete set of mass storage peripherals

([RK11/RK05](http://www.bitsavers.org/pdf/dec/unibus/RK11-C_manual1971.pdf),

[RL11/RL02](http://www.bitsavers.org/pdf/dec/disc/rl01_rl02/EK-RL122-TM-001_techAug82.pdf),

[RH70](http://www.bitsavers.org/pdf/dec/unibus/CSS-MO-F-5.2-27_RH70_Option_Description_Feb77.pdf)/[RP06](http://www.bitsavers.org/pdf/dec/disc/rp04_rp05_rp06/EK-RP056-MM-01_maint_Dec75.pdf),

[TM11/TU10](http://www.bitsavers.org/pdf/dec/magtape/tm11/TM11_Manual.pdf))

and a rather complete set of UNIBUS peripherals

([DL11](http://www.bitsavers.org/pdf/dec/unibus/EK-DL11-TM-003_DL11_Asynchronous_Line_Interface_Manual_Sep75.pdf),

[LP11](http://www.bitsavers.org/pdf/dec/unibus/LP11_UsersMan.pdf),

[PC11](http://www.bitsavers.org/pdf/dec/unibus/PC11_Reader-Punch_Manual.pdf),

[DZ11](http://www.bitsavers.org/pdf/dec/unibus/EK-DZ110-TM-002_DZ11_Asynchronous_Multiplexer_Technical_Manual_Oct78.pdf), and

[DEUNA](http://www.bitsavers.org/pdf/dec/unibus/EK-DEUNA-TM-PRE_TechMan_Dec82.pdf)),

and last but not least a cache and memory controllers for SRAM, PSRAM and

SDRAM (via Xilinx MIG core).

The design is **FPGA proven**, runs currently on Digilent

[Arty A7](rtl/sys_gen/w11a/arty/README.md),

[Basys3](rtl/sys_gen/w11a/basys3/README.md),

[Cmod A7](rtl/sys_gen/w11a/cmoda7/README.md),

[Nexys A7](rtl/sys_gen/w11a/nexys4d/README.md),

[Nexys4](rtl/sys_gen/w11a/nexys4/README.md),

[Nexys3](rtl/sys_gen/w11a/nexys3/README.md),

[Nexys2](rtl/sys_gen/w11a/nexys2/README.md) and

[S3board](rtl/sys_gen/w11a/s3board/README.md)

boards and boots 5th Edition UNIX, 2.11BSD UNIX, as well as various DEC

operating systems from provided [oskits](tools/oskit/README.md).

The current implementation forwards the IO requests from all devices via a

fast serial connection to a backend server on a PC, which translates these

requests and maps them to contemporary interfaces.

True standalone systems are on the project roadmap.

For more information look into:

- w11 project [home page](https://wfjm.github.io/home/w11/), especially the

  sections on [feature set](https://wfjm.github.io/home/w11/impl/) and

  [overall architecture](https://wfjm.github.io/home/w11/impl/architecture.html).

- w11 project [blog](https://wfjm.github.io/blogs/w11/).

- [change log](doc/CHANGELOG.md)

  and [installation notes](doc/INSTALL.md).

- guides to build bit files and test benches

  with [Xilinx Vivado](doc/README_buildsystem_Vivado.md)

  and [Xilinx ISE](doc/README_buildsystem_ISE.md).

- guides to [run test benches](doc/w11a_tb_guide.md)

  and to [boot operating systems](doc/w11a_os_guide.md).

- known [issues](doc/README_known_issues.md).

- known [differences](doc/w11a_known_differences.md).

- the impatient readers can try their luck with the

  [quick start guide](doc/INSTALL_quickstart.md).

A short description of the directory layout

[is provided separately](https://wfjm.github.io/home/w11/impl/dirlayout.html),

the top-level directories are

| Directory | Content |

| --------- | ------- |

| [doc](doc)     | documentation |

| [rtl](rtl)     | HDL sources (mostly VHDL) |

| [tools](tools) | many tools |

### Note on freecores/w11

The [freecores team](http://freecores.github.io/) created in 2014 a

copy of almost all OpenCores cores in Github under

[freecores](https://github.com/freecores). This created

[freecores/w11](https://github.com/freecores/w11)

which is 

[*outdated* and *not maintained*](https://github.com/freecores/w11/issues/1).

***Only [wfjm/w11](https://github.com/wfjm/w11) is maintained***.

### License

This project is released under the 

[GPL V3 license](https://www.gnu.org/licenses/gpl-3.0.html),

all files contain an [SPDX](https://spdx.org/)-style disclaimer:

    SPDX-License-Identifier: GPL-3.0-or-later

The full text of the GPL license is in this directory as

[License.txt](License.txt).