NoClick

Stops the empty-drive "click" on Amiga floppy drives — the ~2.5-second tick a drive makes when no disk is inserted.

Unlike the classic 1.x-era utilities that patch trackdisk or poke the hardware, NoClick uses the OS-official mechanism: since Kickstart 2.0 (V36), trackdisk.device exposes a public per-unit flag (TDPF_NOCLICK in tdu_PubFlags). With the flag set, trackdisk performs its disk-change polling by stepping the head outward past track 0 — a step pulse the mechanism can't act on, so it makes no sound. Disk-change detection keeps working normally.

No patches, no interrupts, no background process: NoClick sets the flag and exits. 2,700 bytes.

Requirements

• Kickstart 2.0 (V36) or newer. On 1.3 the flag doesn't exist: NoClick just says it needs 2.0 and exits with return code 20. Use one of the old hardware-poking utilities there instead.

Usage

NoClick [OFF] [UNIT n]

Invocation	Effect
NoClick	silence all present drives (DF0:–DF3:)
NoClick OFF	turn clicking back on
NoClick UNIT 0	act on a single unit only (0–3)

It reports each drive it finds (DF0: clicking off) and skips absent units. Return codes: 0 = OK, 5 = no trackdisk units found, 10 = bad argument, 20 = Kickstart older than 2.0 (nothing changed).

Installation

The release archive unpacks to a NoClick drawer (with NoClick.info beside it) holding the NoClick program and this README.md. NoClick is a Shell command, so the program has no icon of its own.

Use the .lha: a .zip can't carry AmigaDOS protection bits, so if you unpacked a .zip, run protect NoClick +e in the drawer first.

1. Copy the binary to C: (from a Shell in the NoClick drawer):

   copy NoClick C:
   protect C:NoClick +e
   

2. Add it to the end of S:User-Startup so it runs every boot:

   echo >>S:User-Startup "C:NoClick >NIL:"
   

3. Run C:NoClick once by hand (or reboot). The clicking stops immediately.

The flag resets on every reboot (it lives in trackdisk's unit structure, not on disk), which is why the User-Startup line is needed.

If you're replacing an old WBStartup-style NoClick commodity, remember to remove it (and its .info) from SYS:WBStartup so both don't run.

Getting the binary onto a networked Amiga

Any way you like — but if the Amiga has a TCP stack and wget, a quick transfer from a PC on the LAN:

# on the PC, in the directory holding NoClick:
python -m http.server 8765

; on the Amiga:
wget -O C:NoClick http://<pc-ip>:8765/NoClick
protect C:NoClick rwed

(protect is needed because wget doesn't set the execute bit.)

Building

Cross-compile with amiga-gcc (Bebbo):

m68k-amigaos-gcc -O2 -noixemul -Wall -fomit-frame-pointer -s -o out/NoClick src/noclick.c
python3 tools/mkpkg.py      # stage out/release/NoClick/ + NoClick.info

License

Public domain / do what you like.