ASP(4) Device Drivers Manual (hppa) ASP(4)

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

asp0 at mainbus? irq 28
gsc* at asp?

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).

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/*

gsc(4), intro(4), io(4)

Hardball I/O Subsystem ERS, Revision 1.1, Hewlett-Packard, 30 September 1991.

The asp driver appeared in OpenBSD 2.4.

June 18, 2018 OpenBSD 7.5