out-of-mainstream minis

tony duell ard at p850ug1.demon.co.uk
Thu Jul 2 00:31:19 CDT 2015

Not all minis came from the States :-)

One of my favourite non-mainstream families is the Philips P800 series. It's 
a 16 bit machine with 16 registers (0 is the program counter and 15
is the stack pointer, rest are mostly general purpose) and separate
I/O instructions (not memory-mapped I/O). There were several models
with various implementations of the architecture, including 

P850 (TTL, hardwired not microcoded)

P855, P852, P856, P857, P860 (TTL, microcoded)

P851 (Custom bitslice ICs, microcoded)

P854 (AM2900 bitslice, microcoded)

P853 I think (Single chip)

No, I don't have all of those...


More information about the cctalk mailing list