National Semiconductor introduced their 32bit CISC family in 1982 - originally called 16000 and later renamed as 32000, with intended family members named according to external bus size. The 32016 had a 16bit wide memory bus.
There's lots of information about the CPU, the history, machines which used it, and a high performance HDL reimplementation for FPGA designs, by Udo Möller:
-
The coprocessor for BBC micro by Acorn -
The Ceres machines by Wirth -
The M32632 HDL core by Udo -
The Titan machines by UdoSee also
Wikipedia of course.
From the
OpenCores page:
Quote:
The M32632 has the following features:
simple instructions are executed in one clock cycle,
8 kByte instruction cache,
8 kByte write-through data cache,
one direct mapped TLB of 256 entries for each cache,
basic floating-point instructions for 32-bit and 64-bit data types,
coprocessor interface for custom instructions,
small size of 15400 LEs,
35 MHz clock speed in Altera Cyclone IV FPGA.
Looks like the M32632 fits on a DE0-Nano board, or presumably on
a cheap lookalike.
