---
name: "wax"
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/wax"
---

# wax(4)

GSC bus controller and I/O subsystem

## NAME

**wax** – GSC bus controller and I/O subsystem

## SYNOPSIS

**wax\* at mainbus0 irq 24** **wax\* at phantomas0 irq 24** **gsc2 at wax?**

## DESCRIPTION

The **wax** GSC bus controller is a version of [lasi(4)](/lasi/4.md) with limited functionality and no additional devices on the crystal. It is mainly used as a GSC bus controller for additional onboard devices (e.g. 2nd RS232 or HIL) and sometimes add-on cards (such as a TR-9000 card for the HP 9000/712 models).

## MACHINES

An incomplete list of machines that use the **wax** bus controller:

- 712/\* add-on cards

- 715/{64/80/100}\[XC\]

- 725/{64/80/100}

- 743/\*

- 744/\*

- 745/\*

- A180\[C\]

- B132L\[+\], B160L, B180L+

- C100, C110

- J200, J210\[XC\]

- RDI PrecisionBook

## SEE ALSO

[asp(4)](/asp/4.md), [gsc(4)](/gsc/4.md), [intro(4)](/intro/4.md), [io(4)](/io/4.md), [lasi(4)](/lasi/4.md), [phantomas(4)](/phantomas/4.md) *Precision I/O Architecture Reference Specification*, Hewlett-Packard. *712 I/O Subsystem ERS*, Dwg No. A-A2263-66510-31, Revision 1.1, Hewlett-Packard, 12 February 1993. Volume 46 Number 2, Hewlett-Packard Journal, April 1995.

## HISTORY

The **wax** driver appeared in OpenBSD 3.4.