Add native Foenix F256K file browser (C/cc65) - #2
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The F256K has no Commodore KERNAL, PETSCII or CBM DOS, so it can't share the
6502 core the MEGA65/X16 targets use. This is a from-scratch native browser in
C (cc65) against the F256 TinyCore MicroKernel, in its own f256/ subtree:
- Directory listing via the kernel's event-based Directory API (opendir/readdir).
- Vicky per-cell-colour text mode (char/colour matrices paged through the I/O
window), with the sei/cli discipline the keyboard IRQ requires.
- Keyboard via NextEvent; arrows arrive as ASCII control codes.
- Launch by chaining to the flash-resident pexec loader ("-") via RunNamed;
quit chains back to the shell KUP ("basic").
- Emits a PGZ (load $2000); run from SuperBASIC with `/- fb256`.
Toolchain glue (linker cfg, PGZ startup, kernel.c POSIX/dir layer, api.h,
f256jr.lib) is vendored from ghackwrench/F256_Jr_Kernel_DOS. Verified end to
end in the f256k MAME: boot, listing, navigation, subdir in/out, launch, quit.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Adds a Foenix F256K file browser in its own
f256/subtree.Unlike the MEGA65 and Commander X16 targets, the F256K shares no code with the 6502 core: it has no Commodore KERNAL, no PETSCII, and no CBM DOS. It runs the TinyCore MicroKernel (event-based), draws through the Vicky video chip, and stores files on FAT32. So this is a from-scratch native port written in C (cc65), kept fully separate from
sources/.What it does
Browse the SD card, cursor through the listing, enter/leave folders, and launch a program with Return — the CBM-FileBrowser experience, native on the F256.
How it works
opendir/readdirin the vendoredkernel.c);<DIR>flags, dot/._*junk filtered.$C000I/O window (MMU_IO_CTRL$0001), 16-entry CLUTs at$D800/$D840; matrix writes bracketed withsei/cli(the keyboard IRQ needs I/O page 0).NextEvent; the F256 delivers arrows as ASCII control codes.pexecloader ("-") viaRunNamed; quit chains back to the shell KUP ("basic").$2000); run from SuperBASIC with/- fb256.Build & run
Put
fb256.pgzon the SD card, boot to SuperBASIC,/- fb256. SeeF256.mdfor full docs and controls.Notes
f256jr_pgz.cfg,pgz.s,kernel.c,api.h,dirent.h,f256jr.lib) is vendored from ghackwrench/F256_Jr_Kernel_DOS.f256kMAME: boot, listing, colour render, navigation/paging, subdir in/out, launching a program, and quit back to SuperBASIC.masterand independent of Add MEGA65 (native C65) and Commander X16 targets #1 (the MEGA65/X16 targets), so the two can be reviewed/merged separately.🤖 Generated with Claude Code