Published on: 2025-06-06 13:38:30
I think one of the most interesting questions in the Forth universe is how small can its core be? Which is to say, how few words do you need to implement in a host language (or raw machine code, as we’ll see) before you can bootstrap the rest of the language in the Forth itself? Sadly (ha!), you can make a computer with just one instruction: One-instruction set computer (wikipedia.org). (The most popular one I’ve seen is SUBLEQ, which stands for "SUBtract, branch if Less than/EQual to zero".
Keywords: forth https just planckforth words
Find related items on AmazonPublished on: 2025-07-08 04:24:43
Publications by Bradford J. Rodriguez updated 25 Feb 2023 (added A Threaded Microprogram Machine) A selection of papers I have published, seminars I have presented, and computer programs I have written, that are available on this site. Please note that many of the papers include illustrations -- your browser should support GIF files. Detailed drawings are sometimes offered as PDF (Adobe Acrobat) files. Moving Forth: a series on writing Forth kernels Multiprocessing for the Impoverished: a mu
Keywords: dissertation files forth papers text
Find related items on AmazonPublished on: 2025-09-03 03:39:34
On September 22, 1982, another small home computer was launched in the UK. Named Jupiter Ace, it was created by Jupiter Cantab Limited, a tiny startup founded by two engineers who had previously designed Sinclair ZX Spectrum: Steven Vickers and Richard Altwasser. From Jupiter Ace Manual What distinguished Jupiter Ace from many similar computers of its era was that its ROM contained Forth instead of a BASIC interpreter. It was not enough to make it commercial success and the production ceased a
Keywords: ace basic forth jupiter rom
Find related items on AmazonPublished on: 2025-09-23 10:04:40
A milliForth for 6502 "A Forth in 328 bytes — the smallest real programming language ever, as of yet." The milliForth1 is a review of sectorForth2, and smaller than sector Lisp3 The miniForth4 is another Forth to use in a boot sector of less than 512 bytes. Yes, bytes. But those are for a x86 16-bit CPU. How minimal could be it for a classic 6502 8-bit CPU ? Two essentially different CPUs, a 16-bit x86 based on complex registers and opcodes, and a 8-bit 6502 using page zero as common regist
Keywords: 6502 cells code forth stack
Find related items on AmazonPublished on: 2025-09-27 19:34:32
Collapse OS Bootstrap post-collapse technology Winter is coming and Collapse OS aims to soften the blow. It is a Forth (why Forth?) operating system and a collection of tools and documentation with a single purpose: preserve the ability to program microcontrollers through civilizational collapse. It is designed to: Run on minimal and improvised machines. Interface through improvised means (serial, keyboard, display). Edit text and binary contents. Compile assembler source for a wide range of
Keywords: 6809 collapse editor forth os
Find related items on AmazonPublished on: 2025-09-28 16:00:00
Coding in Forth reminded me of the lawless dystopia in Mad Max. You make your own rules, subject to the limits of the context. You can redefine the IF statement if you so please. You can rewrite machine code instructions for a Word. You can even change Words during run time. Because Words become keywords themselves in Forth, you can create a language that’s optimized for a single purpose, packing commands that would otherwise be dozens of lines into just one. “In Forth, you’re creating your own
Keywords: dupras forth language machine memory
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