It looks like youre talking to a MVSish system on the other end of that CTC, by those vary commands youre using there. Linux's CTC driver has a specific z/OS / OS/390 mode for that, mode 3. In your chandev.conf file, change the ctc line from this: ctc0,0x1370,0x1371
to this: ctc0,0x1370,0x1371,0,3 and your driver loading message should now look like this: CTC driver Version 1.54 with chandev support initialized ctc0 read ch 1370 (irq 04fa) write ch 1371 (irq 04fb) proto 3 You will get much nicer behavior from your CTC then. Jay Brenneman z/OS System Build and Installation Dept. C90A 1A26/710 T/L: 295 - 7745 Extern: 845 - 435 - 7745 [EMAIL PROTECTED]
