User`s guide
Vector
ZCB
Single
Board COmputer
I.
PERSP&:TIVE
1.1
'!be
ZCB
as
a
system
The
Vector
Graphic
ZCB
Single
Board Computer
provides
the
capability
of
a
canplete
canputer
systan
on
a
single
board.
The
ZCB
contains
what you would
normally
find
on
a
CPU
board,
a
PROM/RAM
board
and
an
I/O
board,
all
contained
on
one
S-IOO
bus
compatible
board.
The
ZCB
contains
a Z-80A
microprocessor,
1024
bytes
of
static
RAM
menvry,
sockets
for
up
to
12K
of
PRG1,
one
serial
I/O
port
aOO
three
8-bit
parallel
ports.
Circuitry
is
provided
to
support
static
or
dynamic memories.
All
8-100
8080
signals
are
also
generated
making
the
ZCB
compatible
with
8080
based
systems.
On-board
power
regulation
and
filtering
is
provided
using
IC
regulators
aOO
heat
sinks
for
p::JWer
dissipation.
Input
loading
on
the
bus
is
1
10101
p::JWer
Tl'L
load
while
output
fanout
is
10
Tl'L
loads.
While
the
ZCB
does
replace
3
boards
in
a
typical
system,
it
is
not
a
complete
stand
alone
microcanputer
on
one
board.
A
terminal
device
of
sane
sort
is
needed
as
well
as
additional
RAM
rnemory,
for
rrost
applications.
The
ZCB
could,
however,
be
used
as
a
complete
microcomputer
in
many
process
control
applications.
In
this
case,
preprogranuned
PROMs
(up
to
12K
bytes
worth)
could
be
used
on
a
ZCB
board
that
was
equipped
with
a power
supply.
Sense
data
CXJUld
arrive
by
an
input
parallel
port,
be
processed
by
the
CPU
section
of
the
board
and
any
data
output
(control
signals,
for
instance)
could
be
camnunicated
to
the
equip.rent
via
the
output
parallel
port.
The
data
input
and
a stnmnary
of
actions
taken
could
be
carmunicated
to
a
central
data
processing
location
by
the
serial
port.
Thus
the
ZCB
might
be
used
as
an
intellegent
node
on
a
canplete
process
control
system,
which
could
decide
and
provide
output
tmmediately
and
provide
information
to
a
higher
level
data
processing
system.
1.
2 The
ZCB
as
part
of
a
system
In
mos t
applications,
hO'w'ever,
the
ZCB
will
be
used
a
part
of
a
canplete
Vector
Graphic
microcanputer
systan.
Since
3
boards
are
replaced
by
one,
significant
cost
savings
are
realized.
It
also
reduces
the
physical
size
of
the
overall
canputer
that
it
is
used
with
by
freeing
up
two S-IOO
slots.
Demands
on
the
power
supply
are
also
reduced,
thereby
lightening
the
load
on
the
canplete
system.
The
ZCB
canbines
the
nvst
used
features
of
3
boards:
CPU
board,
PRa1/RAM
board
and
Serial/Parallel
I/O
board.
1.3
cPU
section
The
Vector
Graphic
ZCB
is
designed
around
the
powerful
Z-80A
microprocessor.
The
board
is
8-100
bus
ccmpatible.
All
input
and
output
lines
are
fully
buffered.
loading
on
the
bus
is
no
nore
than
one
standard
Tl'L
load.
In
addition,
the
board
has
the
necessary
circuitry
to
work
with
Rev.
I-B
6/11/80
1-1