June 5, 1993 UDA 4 vax

### NAME

uda - UNIBUS MSCP disk controller driver

### SYNOPSIS

uda0 at uba? csr 0172150 uda1 at uba? csr 0160334 mscpbus* at uda?

### DESCRIPTION

The uda driver is for UNIBUS disk controllers that use MSCP. Among these controllers are:

DEC UDA50 UNIBUS ctlr
DEC KDA50 Q22 bus ctlr
DEC RQDX3 Q22 bus ctlr

The uda communicates with the host through a packet protocol known as the Mass Storage Control Protocol (MSCP). Consult the file <```mscp/mscp.h`> for a detailed description of this protocol.

### SEE ALSO

intro(4)

### HISTORY

The uda driver appeared in 4.2BSD.
A new uda driver approach showed up in NetBSD1.2.