ASP(4)                OpenBSD Programmer's Manual (HPPA)                ASP(4)

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:

     o   Core bus controller
     o   System Clock
     o   Interrupt Controller
     o   DMA Controller
     o   Real Time Clock Interface
     o   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:

     o   705, 710
     o   715/{33,50,75}
     o   725/{50,75}
     o   720, 730, 750
     o   735/*
     o   745i/{50,75}
     o   747i/{50,75}
     o   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.

OpenBSD 4.7                      May 31, 2007                                1
