radix50

Rust library and cli for encoding and decoding DEC PDP-11 and PDP-10 RADIX-50 word streams.

Library Usage

Add this to your Cargo.toml:

[dependencies]
radix50 = "0.1.0"

Example

use radix50::{pdp10,pdp11};

let pdp10_encoded = pdp10::encode("THIS IS A TEST").unwrap();
let pdp11_encoded = pdp11::encode("THIS IS A TEST").unwrap();

assert_eq!(pdp10_encoded, [48739, 46419, 46411, 1215, 47600]);
assert_eq!(pdp11_encoded, [32329, 30409, 30401, 805, 31200]);

let pdp10_decoded = pdp10::decode(&[48739, 46419, 46411, 1215, 47600]);
let pdp11_decoded = pdp11::decode(&[32329, 30409, 30401, 805, 31200]);

assert_eq!(pdp10_decoded, "THIS IS A TEST ");
assert_eq!(pdp11_decoded, "THIS IS A TEST ");

Documentation Shortcuts

• PDP-10 Encodings
  • pdp10::encode
  • pdp10::encode_word
  • pdp10::decode
  • pdp10::decode_word
• PDP-11 Encodings
  • pdp11::encode
  • pdp11::encode_word
  • pdp11::decode
  • pdp11::decode_word

CLI

The code repo contains a cli utility for encoding or decoding (also published as the radix50-cli crate).

Installing from Cargo

cargo install radix50-cli

Building From Source

cargo build --release

The output executable will be create in ./target/release/radix50.

Running

$ radix50 encode "ENCODE THIS"

or

$ echo -n "ENCODE THIS" | radix50 encode

will output a list of 16-bit words in decimal:

8563 24165 808 15160

Add the `--format' flag to output something other than decimal:

$ radix50 encode --format=hex "ENCODE THIS"
2173 5e65 328 3b38
$ radix50 encode --format=oct "ENCODE THIS"
20563 57145 1450 35470
$ radix50 encode --format=bin "ENCODE THIS"
10000101110011 101111001100101 1100101000 11101100111000
$ radix50 encode --format=raw "ENCODE THIS" | xxd
00000000: 2173 5e65 0328 3b38                      !s^e.(;8

Decoding:

$ radix50 decode 6603 24165 808 15188
DECODE THIS.
$ radix50 decode 0x3b60 0x7a18 0x666a 0x7ff8 0x32e0 0x32f 0x5dc0
IT SUPPORTS HEX TOO
$ radix50 decode 0o4164 0o1133 0o76464
AND OCTAL
$ radix50 decode 0b10001010110101 0b101011110000010 0b11101001110001 0b111010001101000
EVEN BINARY

Decoding from stdin will assume a raw bytestream format:

$ printf "\x79\x18\x70\xbf" | radix50 decode
SO RAW

The default uses PDP-11/VAX encoding. Use the --pdp10 flag to use the PDP-10 encoding (also used for PDP-6, DECsystem-10, DECSYSTEM-20).

Display the RADIX-50 character set:

$ radix50 charset

License

Copyright © 2023 David Caldwell david@porkrind.org

MIT Licensed. See LICENSE.md for details.