> From: Kyle Owen > I do have an 11/45, though... so with this modification, I suppose one > could have some fun:
That's for the -11/40 - very different machine, one couldn't use the same technique on the /45; the /40 is prepared to accept additional ucode on additional CPU boards, that's how the EIA works: http://gunkies.org/wiki/KE11-E_Extended_Instruction_Set And it's custom boards, the design for which is no longer extant (pity, as I'd love to play with one myself). Finally, I have this vague memory that they had to put a few minor mods on some of the existing CPU boards (details also lost), although my memory may be misleading me on that. Noel