44c96ec4ab
- rtl/w11a:
- pdp11.vhd: add cpustat_type treq_tbit and resetcnt; use op_rti rather op_rtt
- pdp11_decode.vhd: use op_rti rather op_rtt
- pdp11_sequencer.vhd: tbit logic overhaul; use treq_tbit; cleanups;
use resetcnt for 8 cycle RESET wait
- rtl/sys_gen/w11a/s3board/sys_conf.vhd: disable monitors for timing closure
- rtl/sys_gen/w11a/*/*.vmfset: drop removed signals
- tools
- asm-11/lib/push_pop.mac: add push2
- tbench/w11a/test_w11a_inst_quick.tcl: use creset option to clr pending traps
- tcl/rw11/asm.tcl: asmrun: add creset option (active with ps option)
- tcode/cpu_basics.mac: add F2.3 (reset settling time)
- tcode/cpu_details.mac: add A4.* (PSW + tbit traps)
w11: PDP 11/70 CPU and SoC
Overview
The project contains the VHDL code for a complete DEC PDP-11 system: a PDP-11/70 CPU with memory management unit, but without floating point unit, a complete set of mass storage peripherals (RK11/RK05, RL11/RL02, RH70/RP06, TM11/TU10) and a rather complete set of UNIBUS peripherals (DL11, LP11, PC11, DZ11, and DEUNA), 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, Basys3, Cmod A7, Nexys A7, Nexys4, Nexys3, Nexys2 and S3board boards and boots 5th Edition UNIX and 2.11BSD UNIX.
For more information look into:
- w11 project home page and blog
- change log and installation notes
- guides to build bit files and test benches with Xilinx Vivado and Xilinx ISE
- guides to run test benches and to boot operating systems
- known issues
- known differences
- the impatient readers can try their luck with the quick start guide
A short description of the directory layout is provided separately, the top-level directories are
| Directory | Content |
|---|---|
| doc | documentation |
| rtl | HDL sources (mostly VHDL) |
| tools | many tools |
Note on freecores/w11
The freecores team created in 2014 a copy of almost all OpenCores cores in Github under freecores. This created freecores/w11 which is outdated and not maintained. Only wfjm/w11 is maintained.
License
This project is released under the GPL V3 license, all files contain an SPDX-style disclaimer:
SPDX-License-Identifier: GPL-3.0-or-later
The full text of the GPL license is in this directory as License.txt.