I agree with "logic" or "digital logic". Such circuits are comprised
of logic chips -- CMOS logic, TTL logic, etc etc. from one or more
compatible logic "families".
A microprocessor is different than a logic chip because it requires a
program to define its function. A processor or computer can certainly
be contstructed using logic chips but it will also necessarily contain
memory and would then be regarded as a system or at least subsystem.
I've never heard such a term. Anyway the distinction isn't sharp
because there are simple programmable devices like PALs, and computers
were once built from gates. At Unitrode I watched the amount of logic
in their analog power control ICs slowly increase until it covered
most of the schematic. It's hard to draw a line at say the inclusion
of an ALU and microcode because rudimentary versions of them can
appear in custom logic that is considerably short of being a
microprocessor. Today your power supply regulator or Lithium battery
pack could include a stripped down dedicated processor.
I've designed circuits with Xilinx FPGAs and a VLSI ASIC that ranged
from a simple bus address decoder to a custom dynamic RAM controller
with state-machine memory and decision-making capability, specifically
which competing access request to answer next without forgetting the
refresh. Those user-programmable circuits which are like huge PALs
with memory straddle the fence; they can perform logical computations
if you want them to.
AFAIK insiders talk in specifics and outsiders seek generalized terms
to categorize. Do we distinguish between a hobbyist who works only in
wood and one who also shapes and cuts metal occasionally? Does sawing
off a nail count?
Except that these days you can slap an FPGA on a board, put a
configuration file in it, and common usage will call it 'logic' -- even
though the FPGA has memory in it. Sometimes, even though the FPGA
configuration has a microprocessor hidden in it.
The lines are blurred.
(Note that I am only commenting on usage as I've heard it: were I a
linguist I would claim that a language is what is spoken, not what the
people in ivory towers say _should_ be spoken).
Tim Wescott fired this volley in
True, but a couple of common terms for such a board are "dedicated logic"
and "combinatorial logic".
I began with gates made from 2N104 transistors, some in birdcage
assemblies. A complex machine like a phase-shift modem was the size of
a dishwasher, filled with cards containing two gates each. The
designers really earned their pay back then, modern stuff is more
complex but less clever.
So few of us made it all the way through school that the Army gave up
on training techs for component-level troubleshooting of that
equipment. The four (of ~100) in my graduating class all had science
Glue logic is usually describes the gates between
a microprocessor and something else. I'd use the
term "random logic" (kind of an oxymoron) to describe
a logically functioning set of parts without a