From 7b5c532625a864a3fbaf76f44df6aa99b0d6861e Mon Sep 17 00:00:00 2001 From: user Date: Thu, 16 Jul 2026 07:53:19 +0200 Subject: 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. --- src/syscall.asm | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'src/syscall.asm') 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: -- cgit v1.3.1-sl0p