SIM_PARPORT(9)

🌸 sim_parport — HAL Component 🌸

okay bestie, so sim_parport lives in the HAL Component section of the manual (that's the (9) energy, dev/technical vibes only 💅) and it's literally the fakest little parport you've ever met — but in the best way.

---

✨ NAME ✨

sim_parport — a component that simulates the pins of the hal_parport component 🫶

---

🎀 SYNOPSIS 🎀

loadrt sim_parport [count=N|names=name1[,name2...]]

---

💖 DESCRIPTION 💖

so the whole point of sim_parport is that it swaps in for the pins of a real parport without you having to change a single pin name anywhere else in your config. iconic behavior, no cap. 👑

it comes with pass-through pins (the ones ending in -fake) so you can hook up other components to it.

like fr fr:

eg pin-02-in     will follow     pin-02-in-fake 's logic.
pin_01_out-fake     will follow    pin_01_out (possibly modified by
pin_01_out-invert)

basically pin-02-in is a passenger princess and just follows whatever pin-02-in-fake is doing, and pin_01_out-fake follows pin_01_out (which may have been changed up by pin_01_out-invert) 🦋

it creates all possible pins from both the in and out options of the hal_parport component. the way that… 🤌 so this means you can use other hardware I/O in place of the parport (with zero changes to the rest of your config) or simulate hardware like limit switches. its primary use is in Stepconf for building simulated configs.

⚠️ you must use the names= option to get the right pin names. eg. names=parport.0,parport.1

the read and write functions pass the logic from pins to fake pins or vice versa. the reset function is a no-operation. that's it, that's the whole vibe. 💫

---

🔥 FUNCTIONS 🔥

• sim-parport.N.read
• sim-parport.N.write
• sim-parport.N.reset

---

🌈 PINS 🌈

okay this is the long part, but we're not skipping anybody, everyone gets their moment ⭐

💜 the out pins (hooked up to your config, direction in)

these are the ones your config talks to. bit, direction in, one for each pin number:

• sim-parport.N.pin-01-out — bit, direction in
• sim-parport.N.pin-02-out — bit, direction in
• sim-parport.N.pin-03-out — bit, direction in
• sim-parport.N.pin-04-out — bit, direction in
• sim-parport.N.pin-05-out — bit, direction in
• sim-parport.N.pin-06-out — bit, direction in
• sim-parport.N.pin-07-out — bit, direction in
• sim-parport.N.pin-08-out — bit, direction in
• sim-parport.N.pin-09-out — bit, direction in
• sim-parport.N.pin-14-out — bit, direction in
• sim-parport.N.pin-16-out — bit, direction in
• sim-parport.N.pin-17-out — bit, direction in

🧚 the -fake out pins (direction out)

these are the passengers that follow along, bit, direction out:

• sim-parport.N.pin-01-out-fake — bit, direction out
• sim-parport.N.pin-02-out-fake — bit, direction out
• sim-parport.N.pin-03-out-fake — bit, direction out
• sim-parport.N.pin-04-out-fake — bit, direction out
• sim-parport.N.pin-05-out-fake — bit, direction out
• sim-parport.N.pin-06-out-fake — bit, direction out
• sim-parport.N.pin-07-out-fake — bit, direction out
• sim-parport.N.pin-08-out-fake — bit, direction out
• sim-parport.N.pin-09-out-fake — bit, direction out
• sim-parport.N.pin-14-out-fake — bit, direction out
• sim-parport.N.pin-16-out-fake — bit, direction out
• sim-parport.N.pin-17-out-fake — bit, direction out

🍓 the in pins (direction out)

yes it's giving "in pins that are out", we don't ask questions, we just list them 💀 all bit, direction out:

• sim-parport.N.pin-02-in — bit, direction out
• sim-parport.N.pin-03-in — bit, direction out
• sim-parport.N.pin-04-in — bit, direction out
• sim-parport.N.pin-05-in — bit, direction out
• sim-parport.N.pin-06-in — bit, direction out
• sim-parport.N.pin-07-in — bit, direction out
• sim-parport.N.pin-08-in — bit, direction out
• sim-parport.N.pin-09-in — bit, direction out
• sim-parport.N.pin-10-in — bit, direction out
• sim-parport.N.pin-11-in — bit, direction out
• sim-parport.N.pin-12-in — bit, direction out
• sim-parport.N.pin-13-in — bit, direction out
• sim-parport.N.pin-15-in — bit, direction out

🦋 the -fake in pins (direction in)

the source of truth for the in pins above, bit, direction in:

• sim-parport.N.pin-02-in-fake — bit, direction in
• sim-parport.N.pin-03-in-fake — bit, direction in
• sim-parport.N.pin-04-in-fake — bit, direction in
• sim-parport.N.pin-05-in-fake — bit, direction in
• sim-parport.N.pin-06-in-fake — bit, direction in
• sim-parport.N.pin-07-in-fake — bit, direction in
• sim-parport.N.pin-08-in-fake — bit, direction in
• sim-parport.N.pin-09-in-fake — bit, direction in
• sim-parport.N.pin-10-in-fake — bit, direction in
• sim-parport.N.pin-11-in-fake — bit, direction in
• sim-parport.N.pin-12-in-fake — bit, direction in
• sim-parport.N.pin-13-in-fake — bit, direction in
• sim-parport.N.pin-15-in-fake — bit, direction in

💅 the -not pins (direction out)

the little ✨ inversion ✨ crew, all bit, direction out:

• sim-parport.N.pin-02-in-not — bit, direction out
• sim-parport.N.pin-03-in-not — bit, direction out
• sim-parport.N.pin-04-in-not — bit, direction out
• sim-parport.N.pin-05-in-not — bit, direction out
• sim-parport.N.pin-06-in-not — bit, direction out
• sim-parport.N.pin-07-in-not — bit, direction out
• sim-parport.N.pin-08-in-not — bit, direction out
• sim-parport.N.pin-09-in-not — bit, direction out
• sim-parport.N.pin-10-in-not — bit, direction out
• sim-parport.N.pin-11-in-not — bit, direction out
• sim-parport.N.pin-12-in-not — bit, direction out
• sim-parport.N.pin-13-in-not — bit, direction out
• sim-parport.N.pin-15-in-not — bit, direction out

⭐ the reset-time pin

• sim-parport.N.reset-time — float, direction in

---

👑 PARAMETERS 👑

💖 out-invert (read/write bit)

flip the logic of the matching out pin, bestie:

• sim-parport.N.pin-01-out-invert — bit, rw
• sim-parport.N.pin-02-out-invert — bit, rw
• sim-parport.N.pin-03-out-invert — bit, rw
• sim-parport.N.pin-04-out-invert — bit, rw
• sim-parport.N.pin-05-out-invert — bit, rw
• sim-parport.N.pin-06-out-invert — bit, rw
• sim-parport.N.pin-07-out-invert — bit, rw
• sim-parport.N.pin-08-out-invert — bit, rw
• sim-parport.N.pin-09-out-invert — bit, rw
• sim-parport.N.pin-14-out-invert — bit, rw
• sim-parport.N.pin-16-out-invert — bit, rw
• sim-parport.N.pin-17-out-invert — bit, rw

🧚 out-reset (read/write bit)

reset state for the matching out pin, also rw:

• sim-parport.N.pin-01-out-reset — bit, rw
• sim-parport.N.pin-02-out-reset — bit, rw
• sim-parport.N.pin-03-out-reset — bit, rw
• sim-parport.N.pin-04-out-reset — bit, rw
• sim-parport.N.pin-05-out-reset — bit, rw
• sim-parport.N.pin-06-out-reset — bit, rw
• sim-parport.N.pin-07-out-reset — bit, rw
• sim-parport.N.pin-08-out-reset — bit, rw
• sim-parport.N.pin-09-out-reset — bit, rw
• sim-parport.N.pin-14-out-reset — bit, rw
• sim-parport.N.pin-16-out-reset — bit, rw
• sim-parport.N.pin-17-out-reset — bit, rw

---

🌸 AUTHOR 🌸

Chris S Morley — absolute legend, we stan 🫶

---

🌈 LICENSE 🌈

GPL — free as in freedom, slay 💜

---

and that's the whole page, babe 😭💖 this one came from the LinuxCNC Documentation, dated 2026-03-17, and it's the SIM_PARPORT(9) page — go forth and simulate your parports, main character energy only, periodt ✨🎀🦋