.TH TU 4V "9 February 1983" .UC 4 .SH NAME tu \- VAX-11/730 TU58 console cassette interface .SH DESCRIPTION The .I tu interface provides access to the VAX 11/730 TU58 console cassettes. It could, conceivably, also provide access to the VAX 11/750 TU58 console cassette, but due to flow control problems in the host-TU58 interface access to the 11/750 console storage device is unreliable. .PP The interface supports only raw i/o to the TU58 cassettes. The devices are normally manipulated with the .IR arff (8V) program using the `m' option. .PP The device driver is automatically configured when a system is configured to run on an 11/730 or 11/750. .SH FILES .B /dev/tu0 .br .B /dev/tu1 .SH "SEE ALSO" arff(8V) .SH DIAGNOSTICS .BR "tu: no bp, active %d" . A transmission complete interrupt was received with no outstanding i/o request. This indicates a hardware problem. .PP .BR "neither data nor end: %o %o" . A response from the TU58 indicated neither data to be received nor completion of a control operation. Usually seen when this driver is used on an 11/750. .PP .BR "tu protocol error, state=%s, op=%x, cnt=%d, block=%d" . The driver entered an illegal state. The information printed indicates the illegal state, operation currently being executed, the i/o count, and the block number on the cassette. .PP .BR "tu receive state error, state=%s, byte=%x" . The driver entered an illegal state in the receiver finite state machine. The state is shown along with the control byte of the received packet. .PP .BR "tu: read stalled" . The device did not respond to a read request after 400 milliseconds. This is very common when attempting to use the driver on an 11/750. .PP (to the user) .br .BR "tu%d: %d soft errors, %d chksum errors, %d hard errors" . This is printed on the user's terminal on closing the device. .SH BUGS There should be a useable version of this driver for the 11/750.