August 26, 2001 ASC 4 pmax

### NAME

asc - TURBOchannel single-channel SCSI adapter

### SYNOPSIS

asc* at ioasic? offset ? asc* at tc? slot ? offset ? asc* at tcds? chip? scsibus* at asc?

### DESCRIPTION

The asc driver provides support for the NCR 53c94-based SCSI host adapter on the DECstation 5000 series, and for the PMAZ-AA and related TURBOchannel SCSI-adapter option boards. The asc is a medium-performance implementation of the SCSI-I common command set supporting synchronous and asynchronous SCSI devices. The driver provides no support for targets with multiple Logical Unit Numbers (LUNs).

### SEE ALSO

cd(4), ch(4), intro(4), ioasic(4), scsi(4), sd(4), st(4), tc(4), tcds(4)

### HISTORY

The asc driver first appeared in 4.4BSD.