30 May
2018
30 May
'18
10:33 a.m.
On May 30, 2018, at 6:51 AM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
I?m *very* familiar with the 11/40E as all of our 11/40?s at CMU had been ?upgraded?
to 11/40Es (including all of the ones on C.MMP).
I recall the updated micro-code board but I can?t recall if the main CPU boards needed
any mods. I?ll look over the CMU docs again and see if what might be required.
Did a little bit of micro-programming on the 11/40E but quickly found it was better to
concentrate on efficient algorithms. ;-) But to speed up kcalls in Hydra there was at
one point a lot of custom micro-code on the 11/40Es on C.MMP.
TTFN - Guy
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.