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Xerox 550 User Manual

Xerox 550
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Language processors and
utilities
and applications
software for both commercial and sci
entific
users.
Peripheral equipment includes:
Card equipment: Reading speeds up
to
1500 cards
per minute; punching speed of 100 cards per min-
ute; intermixed binary and
EBCDIC
card codes.
Line printers: Fully buffered with speeds up to
1250 lines per minute; 132 print positions with
character
sets containing 64 or
95
characters.
Magnetic
tape
units:
9-track
systems, single or
dual density (1600 or
800/1600
BPI), industry-
compatible; high-speed, automatic loading units
operating
at
125 inches per second with
trans-
fer rates
up
to
200,000
bytes per second; and
at
75 inches per second
wi
th transfer rates
up
to
120,000
bytes per second.
Rapid Access Data
(RAD)
and disk files:
RAD
capacity
of
2.9
million bytes, with a transfer
rate
of
750,000
bytes per second; disk
capa-
cities
in increments of 49 million bytes per unit
wi
th a transfer
rate
of
312,500
bytes per second.
Keyboard printers:
10
characters
per second.
Data communications equipment: Complete line
of
character-oriented,
message-oriented, and
procedure-oriented equipment
to
connect
remote
user terminals (including remote batch)
to
the
computer
center
via common
carrier
lines and
local terminals
directly.
STANDARD
AND
OPTIONAL
FEATURES
A basic system has the following standard features:
A basic processor
(BP)
that
includes:
Full instruction set
Memory
map
with access protection
Register blocks
(4)
Multiplexor
Input/Output
Processor (MIOP) with:
16 subchannels
1-
or
4-byte
interface
Input/Output
Adapter
Memory unit
that
includes:
Dua I port access
Memory write lock protection
A system control processor
that
inc ludes:
Real-time clocks
(4)
Internal interrupts (14)
Power
fail-safe
detection
External Control Subsystem
(ECS)
System Control Panel (SCP)
Configuration Control Panel (CCP)
Local and remote assist
facility
Error
detecti
on fac iI i ti es
Diagnostics
A system may have
the
following optional features:
System Control Processor options:
Up
to
48
external priori ty interrupts (in groups
of
12)
External Direct
Input/Output
interface
(010)
Memory options:
Up
to
4 additional access ports (in sets of 2).
Input/Output
opti ons:
Multiple
I/O
clusters
t
Up
to 3 additional MIOPs,
each
with
16
sub-
c hanne I s, per cluster.
One
Input/Output
Adapter (for one MIOP)
per cluster.
GENERAL-PURPOSE
FEATURES
General-purpose
computing
applications
are
characterized
by emphasis on computation
and
internal
data
handling.
tThe
aggregate
of processor clusters is restricted by the
max-
imum
memory port limitation of 6.
Standard and Optional
Features/General-Purpose
Features 3

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Xerox 550 Specifications

General IconGeneral
BrandXerox
Model550
CategoryPrinter
LanguageEnglish

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