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Aucbvax.2217 fa.unix-wizards utzoo!duke!decvax!ucbvax!Mike@BRL Fri Jul 10 18:04:54 1981 Re: Re: Adding additional memory to 11/45s From: Mike at BRL

Ken Om..... (Pres of Able Co) had an ENABLE/34 on his 11/45, and electrically it works just fine. Clem Cole from Tektronix has a paper which tells you how to do it -- you can guess, though. There are 32 PAR registers, which neatly slves the problem.

By the way, I forgot to mention that the ENABLE/34 has (optionally) an 8 Kbyte cache (for thefull 22-bit address space), so that you can get even better memory performance. Also, you can put your existing 11/34 cache after the ISOLATE/34 board, and "double cache" your existing memory on the 18-bit bus! (At least you don't have to throw it away!).

With an 8Kbyte cache on an 11/34 with 650ns MOS UNIBUS memory, we got non-floating point performance of roughly 1/2 an 11/70, so it is probably worth it... -Mike

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