---
name: "lasi"
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/lasi"
---

# lasi(4)

core bus controller and I/O subsystem as present on newer HP 9000/700 workstations and single-board computers

## NAME

**lasi** – core bus controller and I/O subsystem as present on newer HP 9000/700 workstations and single-board computers

## SYNOPSIS

**lasi0   at mainbus? irq 28** **lasi0   at phantomas? irq 28** **lasi0   at uturn? irq 28** **gsc\* at lasi?**

## DESCRIPTION

The supported Core bus controllers are those used in conjunction with PA7100LC and PA7300LC CPUs and based upon LSI's macrochip that includes:

- Core bus controller

- System clock

- Interrupt controller

- Real-time clock Interface

- Power system support

- RAM and Flash EEPROM controllers

- Two PS/2 ports

- RS-232 and Centronics I/O ports

- i82596CA LAN coprocessor

- NCR53c710 SCSI I/O processor

- Serial Interface for the CS4216 audio codec

- Interface for the WD37C65C floppy drive controller

- Optional telephone interface (two fax/voice modem channels)

## MACHINES

An incomplete list of machines that use the LASI bus controller:

- 712/\*

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

- 725/{64/80/100}

- 743/\*

- 744/\*

- 745/\*

- A180\[C\]

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

- C100, C110, J200, J210\[XC\]

- RDI PrecisionBook

- SAIC Galaxy 1100

## SEE ALSO

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

## HISTORY

The **lasi** driver appeared in OpenBSD 2.4.