browse words by letter
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
scmp |
2 definitions found From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]: SC/MP (Nicknamed "Scamp") A typical 8-bit {microprocessor} from {National Semiconductor} released in April 1976. It was intended for control applications (a simple {BASIC} in a 2.5K {ROM} was added to one version). It featured 16 bit addressing, with 12 address lines and 4 lines borrowed from the data bus (it was common to borrow lines from the data bus for addressing). Internally, it included three {index register}s (P1 to P3) and two 8-bit general-purpose {register}s. It had a {PC}, but no {stack pointer} or {subroutine} instructions (though they could be emulated with index registers). During {interrupt}s, the {PC} was saved in P3. It was meant for embedded control, and these features were omitted for cost reasons. It was also {bit serial} internally to keep it cheap. The unique feature was the ability to completely share a system bus with other processors. Most processors of the time assumed they were the only ones accessing memory or I/O devices. Multiple SC/MPs could be hooked up to the bus, as well as other intelligent devices, such as {DMA controller}s. A control line (ENOUT (Enable Out) to ENIN) could be chained along the processors to allow cooperative processing. This was very advanced for the time, compared to other {CPU}s. In addition to I/O ports like the {Intel 8080}, the SC/MP also had instructions and one pin for serial input and one for output. (1994-11-16) From V.E.R.A. -- Virtual Entity of Relevant Acronyms 13 March 2001 [vera]: SCMP Stream Control Message Protocol (ST2)
This work is licensed under a
