Forth for Agon computer
The forth16 directory contains a 16-bit FORTH for Agon, to be run in Z-80 mode.
The forth24 directory contains a 24-bit FORTH for Agon, to be run in eZ80 ADL mode. This can use all available RAM. This has slightly more words than 16-bit FORTH.
For the VIEW command to work, it is necessary to store all files from the forth24 subdirectory into the /forth24 directory on the SD card and to store the see.4th file into the /forthlib directory on the SD card.
The forthlib directory contains library files, intended to be loaded via the require command.
- see.4th (a simple decompiler)
- asmz80.4th (the 16-bit Z80 assembler, the 24-bit FORTH always contains the eZ80 assemlber as a standard).
- misc.4th (miscellaneous words)
- files.4th (file extensions, only for forth16. DBLOAD and DBSAVE to load and save files into the entire RAM. Forth24 can use BLOAD and BSAVE with 24-bit addresses. Also contains READ-FILE, WRITE-FILE, REPOSITION-FILE. Forth24 has these standard).
- agon.4th (Graphics, sound, joystick commands for Agon).
- vload.4th (command to load VDU sequences like bitmaps or sound samples from files).
The examples directory contains FORTH example programs that are not specific to Agon FORTH, but that can run under it (and under both versions).
- tetris.4th is a Tetris-like program for text terminals. I used to run it a lot in the early days of Linux.
- tester.4th and core.4th is a small test suite for Forth.
- glosgen.4th is a program to generate glossary files.
- squares.4th is a small example program to run on Agon FORTH.
The examples_agon directory contains FORTH example programs and utilities that are specific to Agon FORTH, but that run under both the 16-bit and the 24-bit versions of it.
- serpent.4th Snake-type game originally submitted to the Olimex WPC June 2023. This is a slight adaptation of this game.
- restit.4th Tetris-type game originally submitted to the Olimex WPS July 2023. Slight modifications.
- spacer.4th 2D horizontal shooter game inspired by TI Parsec. Uses character graphics only.
- graphics.4th Graphics library, including turtle graphics.
- grpdemo.4th Graphics demo, runs on top of graphics.4th
- dodemo.4th. Load graphics.4th and grpdemo.4th and then runs the demo. Put forth.bin (or forth24.bin), graphics.4th, grpdemo.4th and dodemo.4th all in one directory, then the following commands run the demo.
load forth.bin
run . dodemo.4th
Three ready-to run binaries of the games serpent, restit and spacer. You can run them as MOS commands or just load them as binaries. These are 'turnkey' versions of the corresponding FORTH sources.