29 Nov
2014
29 Nov
'14
1 p.m.
On 29/11/2014 20:22, Mattis Lind wrote:
I have been browsing through some of my old Qbus
boards and found one
KD11-F (M7264) CPU with 4 k word memory, a couple of KD11-HA (M7270) , a
KDF11-A (M8186) and some assorted memory boards and some SLUs.
All CPUs seemed to work except for the KD11-F board
The M7264 board has the following chips:
CP1611B-51 2111549
CP1621B451 23001C201
CP1631B-10 23088A501
CP1631B-07 23087A501
The M7270 board has the following chips:
1611H 21-15579
3007D 23-002B5
3010D 23-001B5
2007C 23-002C4
As far as I knew, they used the same chipset with the same instruction
set, but those are clearly different. The 21-15579 is the ALU etc, the
23-xxxxxx are the microcode ROMs. Obviously you could swap the
21-15579, but you probably can't mix-and-match the ROMs. It couldn't be
that one set is something other than a PDP-11 instruction set?
--
Pete