Les Berry wrote: Not a viable option on the earlier 6300s. Angry customers caused that to change with a major motherboard revision. I don't know what the numbers are on the two varieties (the WGS series is a different and more PC compatible situation), but I know that a non-trivial number of 6300s which _couldn't_ accept video cards came in for service when I was at a long-time AT&T retailer in the late 80s. The 6300 ran MS-DOS. The 6300+ ran Unix and the first DOS-under-Unix product, DOSMerge 1.0. Which worked fine, if slowly, as long as you just did DOS system calls, not hardware calls (as mentioned earlier in this thread about the 6300 video subsystem). Of course, if you held yourself to DOS calls instead of hardware calls, performance sucked on all straight PCs and clones, which is why most software never ran on superior equipment like the Tandy 2000, the original TI Professional or the AT&T (original) 6300 series. DOS-under-Unix products can trap those vectors nowadays, but early efforts and systems relying on MS-DOS alone didn't have that ability. Hmm? It must be the contrast between the white 3B2 cases and the black fronts of the 6300s, because I've always thought the 6300 was as ugly as party politics. The 7300 (and 3B1), now that's another story. -- Ward Griffiths Dylan: How many years must some people exist, before they're allowed to be free? WDG3rd: If they "must" exist until they're "allowed", they'll never be free.