---
name: "moscom"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/moscom"
---

# moscom(4)

MosChip Semiconductor MCS7703 based USB serial adapter

## NAME

**moscom** – MosChip Semiconductor MCS7703 based USB serial adapter

## SYNOPSIS

**moscom\* at uhub?** **ucom\* at moscom?**

## DESCRIPTION

The **moscom** driver supports MosChip Semiconductor MCS7703 based serial adapters.

The following devices should work with the **moscom** driver:

```
Syba SY-USB-S
```

## SEE ALSO

[tty(4)](/tty/4.md), [ucom(4)](/ucom/4.md), uhub(4), [usb(4)](/usb/4.md)

## HISTORY

The **moscom** device driver first appeared in OpenBSD 4.1.

## AUTHORS

The **moscom** driver was written by Jonathan Gray ⟨*jsg@openbsd.org*⟩.