On 2/24/98, Tony Duell wrote: {snip, snip about the DEC KM11 maintenance card} Tony: I took a look at the KM11 diagnostics card and compared the pinout to the Unibus pinout that was posted on the list in the last week. First off, do you think that the KM11 will work on an 11/34?? Anyway, I'm not clear as to whether the function descriptions that I have match what the KD11 is supposed to use: 1. bus pin B1 (I'm assuming that that's really pin AB1) is BIRQ6 (according to the post last week), but is shown supplying 8v to the display drivers. 2. The switch S1 is shown providing a ground path on closure to pin AB2. According to the previous post, AB2 is a -12v supply rail. 3. Switch S2 is feeding pin AV2, which is BDAL01. 4. Switch S3 is debouncing pin AA1, BIRQ5. 5. Switch S4 is debouncing pin AU1, PSpare1. Hopefully I'm looking at the right diagram! Rich Cini/WUGNET <nospam_rcini(a)msn.com> (remove nospam_ to use) ClubWin! Charter Member (6) MCP Windows 95/Windows Networking ============================================