simnet@ssc-vax.UUCP (Mark R Poulson) (12/21/89)
I've finally been able to resolve our DR11W problem. VMS 5.2 comes with XADRIVER version X-17 and in this version is a new feature that always sets the attention bit (instead of clearing it) after receiving an interrupt. Somewhere in our system (we have MDB not DEC DR11W boards), this setting of the ATTN bit also sets the ERROR bit, which hoses us. Our temporary solution was to go back to X-16 version of XADRIVER (this comes with VMS 5.1). However, as a reply pointed out, there are bugs in this driver. We tried it as it came from the factory and my problem was gone, but a new one arose. Putting modifications in the XADRIVER code solved this and now it works just fine. The fixes needed in 5.0/5.1 are implemented in VMS 5.2 (XADRIVER X-17), but there is the "new feature" to watch out for. If anyone our there has this version of XADRIVER and it does/doesn't work with non-DEC boards, I'd certainly like to hear about it. Thanks to all who replied! Mark Poulson