sp(4) — VAX
Name
sp − Small VAX user supplied device driver interface
Syntax
device sp0 at uba0 csr 0x39000000 vector spintr
Description
The MicroVAX 2000 and MicroVAX 3100 system modules both have connectors that allow for the installation of a single option module. For example, the DHT32 is an option module (see sh().)). The ULTRIX software includes drivers for the DHT32 and other supported options.
The sp driver is a set of routines that provides the linkages necessary to add a user-written device driver to the ULTRIX operating system. The sp files listed in the Files Section contain comments about interfacing a new driver to the ULTRIX operating system kernel.
Restrictions
The sp driver is not a guide to writing device drivers.
This driver can only be used with the MicroVAX 2000, MicroVAX 3100, VAXstation 2000, and the VAXstation 3100 systems. The usefulness of the sp driver on the VAXstation 2000 and VAXstation 3100 is further limited by option hardware mounting constraints on those systems.
Files
/sys/data/sp_data.c
/sys/io/uba/spreg.h
/sys/io/uba/sp.c