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@(#)ts.4 4.1 (Berkeley) 05/15/85

C 4 ts - TS-11 magtape interface controller zs0 at uba? csr 0172520 vector tsintr

tape ts0 at zs0 drive 0

The ts-11 combination provides a standard tape drive interface as described in mt (4). The ts-11 operates only at 1600 bpi, and only one transport is possible per controller. mt(1), tar(1), tp(1), ht(4), mt(4), tm(4), ut(4) ts%d: no write ring. An attempt was made to write on the tape drive when no write ring was present; this message is written on the terminal of the user who tried to access the tape.

ts%d: not online. An attempt was made to access the tape while it was offline; this message is written on the terminal of the user who tried to access the tape.

ts%d: hard error bn%d xs0=%b. A hard error occurred on the tape at block bn; status register 0 is printed in octal and symbolically decoded as bits.

If any non-data error is encountered on non-raw tape, it refuses to do anything more until closed.

The device lives at the same address as a tm-11 tm (4); as it is very difficult to get this device to interrupt, a generic system assumes that a ts is present whenever no tm-11 exists but the csr responds and a ts-11 is configured. This does no harm as long as a non-existant ts-11 is not accessed.

The system should remember which controlling terminal has the tape drive open and write error messages to that terminal rather than on the console.