ASP(4) | Device Drivers 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:

- 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.

June 18, 2018 | Debian