On Jun 17, 19:31, Hans H?bner wrote: Mmm.. nice find! of helpful Not specifically Intergraph, I'm afraid, but I can tell you about two common pinouts used for 13W3 connectors: that used by Sun, and that used by SGI. They both put R,G,B on the same coax connections, but they differ in the use of the other ten pins for monitor type sense and separate sync. Here are the pinouts: Pin-Layout of a 13W3 (female end): () denotes 75-ohm mini-coax () 1 2 3 4 5 () () 6 7 8 9 10 13W3-SGI ================ pin A1 - Red/R-Gnd pin A2 - Green/G-Gnd pin A3 - Blue/B-Gnd pin 1 - monitor type 3 pin 2 - monitor type 0 pin 3 - Composite Sync pin 4 - H Drive pin 5 - V Drive pin 6 - monitor type 1 pin 7 - monitor type 2 pin 8 - digital gnd pin 9 - digital gnd pin 10 - sync 2 Pin 10 is groound on some SGI machines. 13W3-SUN ================ pin A1 - Red/R-Gnd pin A2 - Green/G-Gnd pin A3 - Blue/B-Gnd pin 1 - n/c pin 2 - n/c pin 3 - sense 2 pin 4 - sense ret pin 5 - Composite Sync pin 6 - n/c pin 7 - n/c pin 8 - sense 1 pin 9 - sense 0 pin 10 - C-Sync ret Suns most often use composite sync (if not sync-on-green) whereas SGIs most often use separate H and V sync (if not sync-on-green). SGI cables tend to have only as many pins as are needed for the machine the cable was sold for; Sun cables usually have all pins wired. For those few Suns that do use separate syncs, H is pin 6 and V is pin 7. I believe some VAXstations use 13W3 connectors -- anybody got the pinout for those? -- Pete Peter Turnbull Network Manager University of York