Experiments of the third kind... This is an attempt at making a faithful and accurate HDL implementation of CADR. There will be no attempt at making this synthesizable (at this time)!
There is a IRC channel on irc.libera.net, ##lispm for random chit-chat. Feel free to send bugs directly to ams@gnu.org.
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Git
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GNU Make
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Ideally using the GCC or LLVM code generator, since at some point there will be a simulatd UART to talk to the core.
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Some sort of VCD viewer:
git clone https://github.com/ams/cadr4
cd cadr4
make suds
make
All build artifacts are created under build directory.
To run a testbench (build/X_tb): make run-X
To run a testbench (build/X_tb) and create the waveforms: make wf-X
To run a testbench (build/X_tb), create the waveforms and run surfer with the waveform file: make surfer-X
If there is a X_tb.opt file next to X_tb.vhd, it is used as waveform options file in GHDL (--read-wave-opt).
If the file contains "recreate" in its first line, the file is deleted and recreated. This will show all signal paths.
If the file contains "ignore" in its first line, the file is ignored, --read-wave-opt is not used.
- cadr: CADR schematics in VHDL
- dip: dip components
- doc: various documents
- rom: ROM files loaded to CADR (P)ROMs
- scripts: helper/utility scripts
- set: set (a set being a set of pages from the CADR schematics) components
- soap: utility to generate cadr_*_suds.vhd files
- tb: system tests
- ttl: ttl components
Each folder should have a README.md containing more information.
- work.set: set components
- work.cadr: cadr components
- work.dip: dip components
- work.sn74: ttl sn74 components
- work.other: other ttl components (am..., dm..., td... etc.)
- work.misc: misc functions and procedures (no components)