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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.