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| author | user <user@clank> | 2026-07-16 07:53:19 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-16 07:53:19 +0200 |
| commit | 7b5c532625a864a3fbaf76f44df6aa99b0d6861e (patch) | |
| tree | 6a6d67644993ccaea4b71bdc0881798887a6d1aa /src/syscall.asm | |
| parent | libc: option parsing (hasflag/optval); wc -l/-w/-c, head -n N (diff) | |
| download | gbos-7b5c532625a864a3fbaf76f44df6aa99b0d6861e.tar.gz gbos-7b5c532625a864a3fbaf76f44df6aa99b0d6861e.tar.xz gbos-7b5c532625a864a3fbaf76f44df6aa99b0d6861e.zip | |
filesystem: a RAM FS (WRAMX) + ls/cat/save/rm; wc/head read files
- fs.asm: 8-slot RAM filesystem in WRAMX ($D000-$DFFF), name[8]+len[2]+data[502];
syscalls open/close/getb/putb/list/remove, seeded with a 'readme' at boot.
- libc: open/close/fgetc/fputc/flist/fremove wrappers + O_READ/O_WRITE/NOFD.
- tools: ls, save (stdin->file, one line), rm; cat/wc/head now take a file arg.
- fix: syscall dispatch clobbers A, so putb takes its byte in E (was reading the
handler's low address byte, 0xDC); ls NUL-terminates 8-char names.
- verified: save/cat/ls/rm cycle; wc readme -> '2 7 38'; head -n 1 readme.
- README: document the filesystem + the A-clobber ABI note.
Diffstat (limited to 'src/syscall.asm')
| -rw-r--r-- | src/syscall.asm | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/syscall.asm b/src/syscall.asm index bf75865..5ed3d6f 100644 --- a/src/syscall.asm +++ b/src/syscall.asm @@ -38,14 +38,18 @@ SyscallTable: dw sys_fork ; 1 FORK dw sys_read ; 2 READ dw sys_write ; 3 WRITE - dw sys_nosys ; 4 OPEN (TODO) - dw sys_nosys ; 5 CLOSE (TODO) + dw sys_open ; 4 OPEN + dw sys_close ; 5 CLOSE dw sys_exec ; 6 EXEC dw sys_wait ; 7 WAIT dw sys_getpid ; 8 GETPID dw sys_nosys ; 9 KILL (TODO) dw sys_nosys ; 10 BRK (TODO) dw sys_yield ; 11 YIELD + dw sys_getb ; 12 GETB + dw sys_putb ; 13 PUTB + dw sys_list ; 14 LIST + dw sys_remove ; 15 REMOVE ; ----------------------------------------------------------------------------- sys_nosys: |