NAME

xt − Xylogics 472 1/2 inch tape controller

SYNOPSIS

controller xtc0 at mb0 csr all virt 0xebee60 priority 3 vector xtintr 100 tape xt0 at xtc0 drive 0 flags 1

DESCRIPTION

The Xylogics 472 tape controller controls  Pertec-interface 1/2" tape drives such as the CDC Keystone III, providing a standard tape interface to the device, see mtio(4).  This controller is used to support high speed or high density drives, which are not supported effectively by the older TapeMaster controller (tm(4)). 

The flags field is used to control remote density select operation: a 0 specifies no remote density selection is to be attempted, a 1 specifies that the Pertec density-select line is used to toggle between high and low density; a 2 specifies that the Pertc speed-select line is used to toggle between high and low density.  The default is 1, which is appropriate for the CDC Keystone III (92185) and the Telex 9250.  In no case will the controller select among more than 2 densities. 

SEE ALSO

mt(1), tar(1), tm(4), mtio(4)
 
 

Sun Release 2.0  —  Last change: 27 March 1985