Reference

asp(4)

core bus controller as present on older HP 9000/700 machines

NAME

asp – core bus controller as present on older HP 9000/700 machines

SYNOPSIS

asp0 at mainbus? irq 28 gsc* at asp?

DESCRIPTION

The supported Core bus controllers are those present on older PA-RISC workstations, and include:

  • Core bus controller

  • System clock

  • Interrupt controller

  • DMA controller

  • Real-time clock Interface

  • RAM and EEPROM controllers

The irq level supplied is hardwired to the CPU pin, so changing the value would not produce any noticeable results (except lost interrupts for the whole I/O subsystem).

MACHINES

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

  • 705, 710

  • 715/{33,50,75}

  • 725/{50,75}

  • 720, 730, 750

  • 735/*

  • 745i/{50,75}

  • 747i/{50,75}

  • 755/*

SEE ALSO

gsc(4), intro(4), io(4) Hardball I/O Subsystem ERS, Revision 1.1, Hewlett-Packard, 30 September 1991.

HISTORY

The asp driver appeared in OpenBSD 2.4.