hurriedreformist/slow32 repository overview

⁠SLOW-32

SLOW-32 is a 32-bit RISC instruction set of my own design, with everything that goes around one: an assembler, linker and librarian, an LLVM backend, a C compiler that was bootstrapped from Forth and now compiles itself, five emulators, and compilers for COBOL 85, Fortran 77 and Forth. Source: https://github.com/brazilofmux/slow32-public⁠

Every tag is built for amd64 and arm64. The images form a chain; each one contains everything below it.

Sizes are compressed, per architecture.

⁠Try it

Compile and run C:

  docker run --rm -v "$PWD":/data hurriedreformist/slow32:toolchain s32cc hello.c hello.s32x
  docker run --rm -v "$PWD":/data hurriedreformist/slow32:emulator s32run hello.s32x

A Forth session:

  docker run --rm -i hurriedreformist/slow32:forth s32forth

COBOL and Fortran, then run the result:

  docker run --rm -v "$PWD":/data hurriedreformist/slow32:cobol   s32cob -free prog.cbl -o prog.s32x
  docker run --rm -v "$PWD":/data hurriedreformist/slow32:fortran s32f77 prog.f -o prog.s32x
  docker run --rm -v "$PWD":/data hurriedreformist/slow32:emulator s32run prog.s32x

C through the self-hosted compiler, and Lua on the emulator:

  docker run --rm -v "$PWD":/data hurriedreformist/slow32:kit s32kcc hello.c -o hello.s32x
  docker run --rm -i hurriedreformist/slow32:kit s32run /opt/slow32/kit/lua.s32x < script.lua

s32run takes --fast, --dbt, --interp or --qemu to pick an engine; -t traces every instruction on the C++ engines. Programs read and write /data, so mount your working directory there.

⁠Networking

The guest can open a real socket. IPv4 TCP only -- no DNS, no UDP, no Unix sockets -- through socket, bind, listen, accept, connect, send and recv, with the host opening the actual socket on the guest's behalf. Addresses are numeric (127.0.0.1, or htonl(INADDR_LOOPBACK)).

Two SLOW-32 programs talk to each other over loopback rather than through shared memory. The engines agree on it: a socket test runs in the cross-engine differential alongside the rest.

⁠What is not here

This is a hobby machine, not a product. There is no operating system, and the C library is the project's own. Networking is IPv4 TCP and nothing else (see below). The toolchain image is large because it carries a full LLVM build.

⁠Licence

MIT, with third-party notices in /opt/slow32/NOTICE inside every image (Lua, SQLite, David Gay's dtoa). Built from the public repository above.