Vector ZCB User Manual
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ZCB
SINGLE
BOARD
CDMPtJI'ER
Revision
USERI S MANUAL
Revision
June
11,
1
B
1980
COP1~ight
1980
7200-0203-03-02
vector
Graphic
Inc.
Vector
contents
covered
the
right
in
the
person
exists.
The
date
page.
improved
date
and
recently
product
and
the
product.
TITLE
PAGE.
Graphic
of
byawarranty
to
content
of
such
and
The
revision
but
revision
revised.
will
manual
EAQI
this
revise
revision
reV1Slon
the
get
will
MANUAL
makes
manual
hereof
a new
Copyright
no
or
this
or
letter
PRODUCT
on
the
When
revision
revert
SHOULD
1980
All
rights
Disclaimer
representations
itself,
repair
publication
without
of
Title
the
whether
agreement.
obligation
changes,
Revisions
each
such
itself
to
page
as
Page
product
number,
revision
ONLYBEUSED
by
Vector
reserved.
or
and
except
herein
A
or
has
not
corresponds
itself
as
A,
Graphic
or
not
Further,
to
make
when
B
changes
been
shown
as
WITH
warranties
the
product
changes
of
Vector
an
agreement
appears
significantly
to
is
modified
on
if
it
were
THE
PRODUCT
Inc.
Vector
Graphic
at
if
the
that
the
with
respect
it
describes
Graphic
from
manual's
treating
time
to
to
the
bottom
MANUAL
modified.
of
the
significantly,
IDENI'IFIED
the
title
a
reserves
to
notify
contrary
of
has
page
brand
to
time
been
most
page,
ON
the
is
any
each
The
the
new
THE
Rev.
I-B
6/11/80
vector
ZCB
Single
Poard Computer
The
ZCB
Single
faults
implied
the
ninety
Single
and
above
Poard
warranty
notwithstanding,
(90)
iIIiOrkmanship,
1.
ZCB
Single
2.
claimed
GRAPHIC,
INC.,
within
3.
to
INC.,
confirm
replacement
Repair,
which
performed
Single
GRAPHIC,
any
forth
replacement
are
by
Board
INC.,
repair,
above,
then-current
applicable
hour
of
work
replacement
after
INC.,
VECTOR
written
INC.,
INC.,
shall
Computer
proceed,
of
expiration
will
signed
to
have
the
estimated
GRAPHIC,
estimate
camnence
until
and
Board
without
days
Computer
Computer
any
warranty,
of
fitness
following
that
provided:
Such
defect
Board Computer
VECTOR
The
if
discovered
VECTOR
ten
ZCB
at
found
GRAPHIC,
(10)
Single
customer's
the
alleged
to
or
correction
after
GRAPHIC,
Computer
for
such
replacement
Buyer
rate
will
VECTOR
is
$35.00
GRAPHIC,
required
or
correction
of
the
submit
to
Buyer a
INC.,
of
charges
by
no
obligation
the
VECTOR
duly
authorized
with
written
GRAPHIC,
the
repair
VECTOR
delivery
is
in
material
left
INC.,
days
after
Poard
be
in
expiration
is
returned,
repair,
or
be
charged
for
thereafter.
of
defects
period
written
will
has
repair
to
repair,
estimate
INC.,
charges
REPAIR
AGREEMENT
sold
either
for
intended
GRAPHIC,
found
or
the
VECTOR
is
its
Computer
expense,
defect,
order.
of
any
INC.,
at
replacement
correction
in
INC.,
the
first
in
for
no-cost-to-Buyer
estimate
not
commence
been
returned
representative
work
replace
may
prior
hereunder
expressed
use
or
INC.,
to
customer,
to
contain
v;orkmanship
GRAPHIC,
given
notice
discovery;
is
promptly
for
examination
and
for
defects
of
Buyer
also
the
after
period
I s
expense,
at
Buyer's
or
correction.
expiration
in
addition
repair
hour,
material
Prior
rate.
and
to
of
or
the
repair
by
authorizing
involved.
or
correct
has
been
at
its
to
canmencing work.
returned
option
is
or
sold
implied,
lias
including
merchantability.
will,
repair
defects
existed
INC.,
of
for
or
replace
in
at
factory;
the
precise
.
returned
by
VECTOR
subsequent
material
set
or
forth
provided
expense,
In
of
the
to
the
cost
At
the
present
$18.00
per
hour
commencing
workmanship
repairs,
VECTOR
expected
until
Buyer
such
to
VECTOR
VECTOR
VECTOR
any
GRAPHIC,
ZCB
with
also
require
is",
with
However,
a
period
any
materials
the
time
defect
to
VECTOR
GRAPHIC,
repair
workmanship
above
will
the
to
VECTOR
performing
period
of
parts
time
for
every
any
repair,
discovered
GRAPHIC,
charges,
time
as
GRAPHIC,
GRAPHIC,
INC.,
Single
Board
approval
prepayment
all
any
of
ZCB
or
the
or
be
ZCB
set
the
the
and
the
to
Repair
GRAPHIC,
Rev. 1-B
Agreement
INC.
within
6/11/80
void
ten
if
(10)
the
days
enclosed
of
end consumer
card
is
not
purchase.
returned
to
VECTOR
Vector
ZCB
Single
FOREWORD
Board computer
Audience
Scope
This
manual
distributors,
moderate
technical
computers.
It
will
describe
ZCB
Single.
Board
ofacanputer
both
systems,
in
Vector
and
is
intended
or
system,
Graphic
how
others
knowledge
what
the
Canputer
how
and
the
board
for
with
Vector
does
to
in
circuitry
canputer
at
least
of
small
Graphic
in
the
use
the
other
a
/
context
board
S-lOO
WJrks.
Organization
Each
section
of
technical
WHAT
the
moderate knowledge
"User"s
things
Guide"
and
knowledge,
jLmIpers
and
Operation"
is
written
depth.
"Perspective"
board does and
of
describes
aSSllTIleS
plus
flip
discusses
the
the
ability
switches.
WHY
and assumes a knowledge
electronics.
at
a uniform
requires
computer
HCW
same
level
to
"Theory
the
of
digital
level
describes
only
a
design.
to
make
it
of
solder
of
board works
do
Rev.
l-B
6/11/80
Vector
Section
ZCB
Single
Board
Canputer
TABLEOFCONI'ENI'S
Table
Specifications
I.
Perspective
1.1
1.2
1.3
1.4
1.5
II.
User! s Guide
2.1
of
Contents
'It1e
ZCB
as a
The
ZCBaspart
CPU
sect
ion
EPR~/R.M1
I/O
section
1.5.•1
1.5.2
1.5.3
105.4
1.5.5
II!!5.6
2.1.1
section
Serial
Serial
serial
RS-232C Theory.eeel\l ••
RS-232C
Parallel
Standard
system
II«lII
II II
" lit
Ports
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Synchronous Cammunications
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1-2
1-3
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1-5
2-1
2
2.2
2.3
2.4
CPU
Sect
ion
2.2.1
2.2.2
2.2.3
Running
MW1(ITE
Auto
EPRCl1/RAM.
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
I/O
2.4.1
2.4.2
2.4.3
2.4.4
2708
Auxiliary
2716
2732
Enable
Phantom
Jumper
Section.
I/O
Address
Asynchronous
How
IIII0 e Ie 0 III
the
enable/disab1e
WArT
state
Section".
EPROM
Addressing
Memory
EPROM
EPROM
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areas
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to
connect
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Rev. 1-B
6/11/80
Section
Vector
ZCB
Single
Board Computer
2.4.5
2.4.6
2.4.7
2.4.8
2.4.9
2.9
Spare Chip and
III.
Theory
3.1
3~2
of
System
Serial
IV. Schematics
Howtoconnect
Connecting
Using
the
Connecting
Connecting
Patch
Operation
Operation
Ports
•••••••••••••••••
most low speed
additional
Parallel
Sprint
Vector
areas
Ports
3
to
MP
to
•••••••••••••••••••••••••••••••••
Block Diagram
RS-232C
acoustic
handshaking
couplers
lines
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ZCB
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2-l5
2-l5
2-l8
2-19
2-19
2-20
3-1
3-2
Rev. 1-B
6/11/80
vector
ZCB
Single
Board
canputer
SPECIFICATIONS-System
Compatibility:
Power Requirements
Availabili
ty:
Merrory
EPROMs
included
with
board
Memory
Memory
Standard
Systems Monitor
Speed
Types
Location
EPRa1
of
Most S-lOO
+8VOC@970
+16
VDC
-16
VDC
Shipped
systems.
rna.
(typ.)
@ 120
@
80
mao
rna.
assembled,
tested,
SPECIFICATIONS-EPRa1/RAM
65536
3
bytes
EPRCM
addressable,
sockets
on
board,
none
RAM:
RAM:
300ns.
EPRCM:
2114
EPROM:
User
selected
static
2708, 2716, 2732
EOOOH-E7FFH
(450
burned
1024
up
ns.
bytes
to
12K
typical)
in;
no
kits.
RAMonboard,
addressable
Power-on/Reset
Options
Processor
Number
Number
of
of
Data
Address
Instructions
Clock speed
Interrupts
I/O
devices
Dynamic
RAM
Jump
Bits
Bits
Auto
boot
EOOOH.
Shipped
SPECIFICATIONS-CPU
Z-80A
8
16
158,
including
2
or4MHz,
Z-80
Mode
256
I/O
Supports
on bus
line
generated
on power
enabled.
all
jumper
0 (8080 mode),
addresses
d}mamic
on
66;
board.
memory
fast
on/reset,
78
8080
instructions
selectable,
MODE1,MODE
by
sending
reset/power
jumps
enabled
on
to
memory
for4MHz.
2
Z-SO
clear
location
RFSH
signal
Rev.
I-B
6/11/80
Vector
ZCB
Single
Board Computer
Static
RAM
MWRITE
Wait
state
for
memories
than
300
Bus
Load
Buffering
Phantom:
Mirroring
generation
slower
ns.
Fully
Jumper
Standard:
3
cycle,
compatible
option
options:
generate
option
generate
instruction,
Standard:
generate
instruction.
1
standard
Fan
out:
Output
EPRCM/RAM
TTL
15
standard
buffer
Boards, which
Power-on-clear
Standard:
Standard:
enabled
enabled,
SPECIFICATIONS-I/O
to
generate
enabled.
one
one
wait
generate
load
one
on
no
wait
all
(60 low power
disable
compatible
(POe). Jumper
can
be
MWRITEonboard
wait
state
wait
state
states.
state
on each bus
after
after
inputs
shottky)
with
generate
phantom
selectable:
disabled.
each
each
Vector
Ml
Ml
Graphic
in
response
on/off.
to
Capacity
Serial
port
Port
Signal
addresses
levels
RS-232 handshaking
Asynchronous
Rates
Data
bits
Stop
bits
parity
1
serial
as
input
1,
using
Any
addresses
Control,
EIA
Typical
DSR,
RS-232 and 3
or
8251
increment
are:
05H
RS-232C
handshaking
etc.
110-9600 baud
5 -
8,
programmable
l,
1
1/2,
or
odd,
Even,
or
8-bit
output.
controller
of
four
Data,
chip.
fran
04H
(echoed on 06H);
(echoed on 07H.)
is
provided,
(switch
2,
programmable
selectable)
none, programmable
parallel
DOHtoFER.
ie.
ports
Preset
RI'S,
programmable
CTS,
DI'R,
Rev.
I-B
6/11/80
Vector
Synchronous
ZCB
Single
Board Computer
Parallel
Port
latching
Signal
Rates
Synch
Clock
Parity
Data
Sync
bits
character
Ports
Addresses
level
detect
OC-56K.
Can
be
8251
SYNDET
r-bt
now
for
synchronous
EvenI
5
odd,
-
8,
Single
2-8
bit,
an
8255
Any
increment
addresses
and
the
Output
'ITL
(input
load)
•
wired
for
line
connected
internal
is
to
operation.
or
none,
prograrmnable
or
double
2-4
parallel
are:
Control
latched,
bit
of
synch
can
I/O
four
Port
Status
input
= 1 low power TIL
or
external
not
connected.
the
external
prograrmnable
character
be
programmed
controller
from
OOHtoPFH.
A,
08H:
Port
Register
not
latched.
load:
\\GrId
can
as
chip.
B, 09Hi
at
DBH.
output
synch.
as
required
be
progrannned.
3-8
bit.
Preset
Port
drives
C,
Uses
OAH
1
TI'L
Number
Data
Cable
of
lines
transfer
8
lines
+5
VDC
Over
lOOK
Optional.
ribbon
allowing
ordered
per
channel,
and
GND
bytes/second.
Has
34-pin
cable.
user
to
separately.
are
also
No
connector
configure
programmable
provided.
female
connector
is
at
as
required.
for
input
and
the
ot..~er
or
34-line
end,
Must be
output.
Rev. 1-B
6/11/80
1.1
Vector
The
ZCB
The
ZCB
Vector
asasystem
ccrnplete
normally
contained
The
ZCB
sockets
for
ports.
S-lOO 8080
based
systems.
regulators
1 low
power
Single
Graphic
canputer
find
on
one
contains
up
to
Circuitry
signals
and
heat
TTL
Board Computer
ZCB
Single
system
on
S-lOO
a
CPU
bus
onasingle
board,
a Z-80A
12K
of
PRCM,
is
provided
are
also
On-board
load
sinks
while
power
for
I.
PERSPECrIVE
Board Computer
board.
a
PROM/RAM
canpatible
board.
microprocessor,
one
serial
to
support
generated
making
regulation
power
output
dissipation.
fanout
I/O
and
is
provides
The
board
1024
port
static
the
filtering
10 TTL
ZCB
bytes
and
or
ZCB
Input
loads.
the
contains
and
an
of
static
three
dynamic
compatible
is
provided
loading
capability
what
I/O
8-bit
you WJuld
board,
RAM
parallel
memories.
with
on
the
of
memory,
8080
using
bus
a
all
All
IC
is
1.
2 The
While
complete
sort
ZCB
is
could,
control
worth)
Sense
data
section
could
data
data
an
and
data
be
input
processing
intellegent
provide
processing
ZCBaspart
In
most
Vector
Graphic
significant
the
overall
Demands
the
canplete
the
ZCB
does
stand
needed
alone
as
however,
applications.
could
of
could
the
be
arrive
board
camnunicated
and
a summary
location
node
output
system.
ofasystem
applications,
microcanputer
cost
savings
canputer
on
the
power
system.
replace
microcanputer
well
as
additional
be
used
In
this
used
on
a
by
and
to
the
of
by
onacanplete
irmnediately
however,
are
that
it
supply
3
as
case,
ZCB
board
an
input
any
data
equipment
actions
the
serial
and
system.
realized.
is
used
are
also
boards
on
one
RAM
a
complete
preprogrammed
that
parallel
output
via
taken
port.
process
provide
the
ZCB
Since
It
with
reduced,
in
a
typical
board.
memory,
microcomputer
was
port,
(control
the
could
control
information
will
3
boards
also
by
freeing
thereby
A
terminal
for
rost
PROMs
equipped
be
output
be
communicated
Thus
the
system,
be
usedapart
reduces
system,
applications.
in
(up
with
a power
processed
signals,
parallel
ZCB
might
which
to
a
are
replaced
the
physical
up
two
lightening
it
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device
many
to
12K
of
some
process
bytes
supply.
by
the
for
instance)
port.
to
a
central
be
used
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higher
decide
level
ofacomplete
by
one,
size
S-lOO
the
slots.
load
a
The
CPU
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as
of
on
board
1.3
CPU
microprocessor.
lines
TTL
Rev. I-B
The
and
section
The
are
load.
ZCB
combines
Serial/Parallel
Vector
fully
In
addition,
6/11/80
the
Graphic
The
board
buffered.
most
the
I/O
ZCB
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board
used
board.
is
S-lOO
Loading
has
features
designed
bus
canpatible.
on
the
the
of3boards:
around
bus
is
necessary
the
All
no more
circuitry
CPU
board,
powerful
input
thail
to
and
one
standard
work
PRCM/RAM
Z-80A
output
with
1-1
Vector
ZCB
Single
Board
Canputer
dynamic
design
MSI
1.4
PID1/RAM
and
in
Their
ZCB.
This
systems,
power-on/reset
wide
1.5
I/O
parallel
level
printers,
The
uses
addresses
of
logic
and
The
up
to
this
technical
The
allows
range
section
The
serial
The
I/O
eight
256
built
memories,
has
been
ISI
integrated
section
PROM/RAM
12K
of
manual,
PROM
the
languages,
are
of
addressing
I/O
section
ports
or
port
modems
CPU
sends
addresses
I/O
by
jumper(s),
possible
into
such
as
stressed
circuits.
section
PRCM,
the
RCMorEPRa1.
terms
distinction
may
be
user
maximum
available.
of
ports
for
and
terminals.
data
used
by
addresses
port
the
addresses
Vector
Vector
to
Graphic's
enhance
features
PROM,
makes no
implemented
flexibility
etc.
Several
Advanced
options.
the
ZCB
single
programmable
interfacing
to
the
serial
the
board
as
from
listed
DOH
in
may
Graphic
reliability
lK
of
Note:
EPRCM
difference
using
as
with
and
can
be
to
Section
be
ZCB.
64K
meJTK)ry
on-board
For
the
and
Ra1 may
in
either
with
regard
jumper
address
board
input
computer
or
multiple
parallel
changed
FFH. You
2.4.1.
accessed
board.
of
operation
RAM
memory
purposes
be
how
they
2708's,
to
options
decoding
output
perpheral
ports
as
a
specify
Thus,
with
the
Simplicity
(using
of
used
interchangably.
are
2716's
choice
such
logic
offers
and
devices
via
I/O
group.
the
the
advanced
by
the
discussion
used
or
of
operating
as
jump
permits
three
one
RS-232C
addresses.
The
value
entire
decoding
use
2114's)
in
the
2732's.
8-bit
such
board
of
the
range
of
of
on
a
as
1.5.1
The
ZCB
Board
though
its
the
serial
USARr
of
chip
via
Vector
features.
board
Discuss
(Universal
the
flexibility
and
software.
as
ports
ion
its
transmission,
as
ASCII
added-on
choice
using
the
code
parity
of
8251,
one,
communication.
is
asynchronous
cases,
hardware
does
not
cane
with
Graphic
The
it
corres
Vector
supplies
Graphic
fran
the
factory
generally
of
the
serial
port
Synchronous/Asynchronous
of
the
ZCB
parallel
and
having
bit
one
the
or
counterpart,
You,
the
through
format
between
(choice
and
a
board
Baud
rates,
synchronous,
of
half,
can
of
even
handle
format,
modifications.
any
certain
Extended
centers
board
the
software,
the
transmitted
5
and8bits
or
or
two
handshaking,
is
specified
software
items
Systems
without
around
for
of
software
Monitor
any
modification.
the
ReceiverjTransmitter)
derives
8255,
can
both
fram
of
control
data.
per
character,
odd),
either
and
stop
bits
asynchronous
with
and
through
specific
that
4.0
industry
the
flexibility
which
the
Data
can
rate
is
with
one
start
per
c~aracter.
or
whether
software
applications,
make
use
will
work
standard
chip.
Much
of
be
modified
of
serial
transmitted
an
optional
bit
and
Further,
synchronous
ccmnunication
and,
in
some
of
with
8251
this
a
1-2
Rev.
l-B
6/11/80
vector
the
order
port,
to
Synchronous/Asynchronous
This
More
say
User's
and
Products,"
It
is
8251
to
you
Intel's
Note
readily
about
Adam
ZCB
Single
not
within
USART
write
will
Manual,"
Osborne's
your
need
Application
is
also
available
camnunication
also
Board Computer
the
chip,
own
to
an
excellent
available
"An
available
scope
nor
camnunications
be
theory,
Introduction
of
this
to
teach
thoroughly
Note
references
#16,
Receiver/I'ransmitter,"
reference
are
the
either
in
many
from
to
canputer
manual
the
software
familiar
entitled
on
Intel
Microcanputers,
to
theory
with
on
basic
the
8251,
"INTEL 8080
or
stores.
detail
of
or
"Using
but
most
the
functioning
serial
to
this
which
communications
Microcomputer
canputer
camnunication.
nodify
The
ones
VolUIre
the
chip.
8251
Intel
that
retail
II
ZCB
You
can
Universal
will
have
-
Sane
serial
refer
provide.
theory.
less
Systems
stores,
Real
of
In
to
1.5.2
110, 150,
rate
the
without
modern
bits/second,
keyboard
Il'Ddem
character,
of
you
and
in
1.5.3
Modifications
the
outside
board.
serial
You
using
If
you
chosen
that
at
You
stop
can
if
chosen,
software,
Serial
You
8251
asynchronous
can
select
300, 600,
a
small
are
writing
rate
physically
is
you
to
change
any
given
can
select
selecting
bits
can
in
each
select
synchronous
whether
whether
see
enable
to
SYNDEr
~rld,
which
communication
the
rate
1200,
DIP-switch
custan
of
a
port
opening
switch
can
write
the
canputer's
time.
via
software
either
character,
or
the
references
communication
the
serial
the
board
pin
and
is
not
of
2400, 4800,
on
software,
by
4,
up
the
selectable
a
program
5,
selecting
or
notaparity
not
it
given
port
will
be
the
TxC
and
the
case
transmission
or
9600
the
board.
there
allowing
computer.
for
that
rate
of
camnunication
the
number
6,
7,
or
8.
either
bit
is
even
or
earlier
to
camnunicate
required
P..xC
clock.
in
the
and
bits/second.
is
also
some
software
For
either
enables
of
You
is
included
odd
parity.
for
to
accanplish
pins
standard
reception
a
example,
1200
the
data
can
also
1,
1-1/2,
the
8251
in
must
configuration
fran
You
simple
control
bits/second
operator
to
match
bits
the
in
select
or
for
each
For
how
USARI'.
synchronous
this.
be
connected
way
if
each
2.
a
choice
choose
to
divide
of
the
you
have
or
using
that
of
ASCII
the
number
Finally,
character,
to
do
In
brief,
to
of
of
the
rate
a
300
the
the
this
mode.
the
the
Once
set
up
camnunication,
with
asynchronous
length,
software
chosen,
select
synchronization,
Rev.
selecting
whether
whether
separately
l-B
6/11/80
for
synchronous
by
using
canrnunication,
either
or
notaparity
or
not
it
for
each
and
whether
an
is
communication,
external
you
5,
6,
7,
bit
even
or
port
whether
one
or
clock
can
or
is
odd
two
you
between0and
select
8
included
parity.
you
synch
bits.
are
characters
via
for
using
can
software
You
each
Also
select
56K
can
character,
via
software,
internal
are
the
bits/second.
the
character
also
or
used.
select
external
rate
and
you
of
As
via
if
can
1-3
Vector
ZCB
Single
Board
canputer
1.5.4
RS-232C
This
manual
description,
by
Electonic
Street,
N.W.,
Datapro
articles
information,
An
RS-232C
Positive
industry
RS-232C
to
and
fran
(about
data
An
0 Vdc)
RS-232C
line
correspond
also
associated
by
the
and
receive
are
handshaking
canmunication
equipment
and
a few
specifies
definitions
signals.
applications
theory
obtain
Industries
Washington,
or
Auerbach
describing
however,
signal
is
ON
wide
line
conventions
drivers
TI'L
and
cable
carries
with
data
to
inform
others
a
set
as
some
Altogether
use
cannot
a
copy
the
will
can
or
SPACING,
typically
signals.
RS-232C
consists
a
serial
the
characters
formating
device
lines,
lines
that
each
that
are
of
rarely
of
only
a few
describe
of
Association,
D.C. 20006.
reports
protocol
be
either
that
Hence,
NEGATIVE
of
and
such
there
are
other
rarely
the
primary
there
of
the
the
RS-232C
on
communications,
of
:i.rrn't'Ediate
be
POSITIVE (+12 Vdc)
Negative
date
invert
RS-232C
corresponds
25
lines.
sequence
you
want
parity
as
an
are
ground
used
by
of
used).
used
"secondary"
lines,
are
them.
RS-232C
EIA
Engineering
Alternately,
and
its
relevance
is
OFF
back
to
these
POSITIVE
An
of
POSITIVE
to
transmit
information
8251.
lines,
canmunication,
their
status
The
but
25
RS-232C
protocol
in
STANI:lrillD
Department,
if
they
implications.
in
or
or
MARKING.
the
days
signals
when
corresponds
to
TI'L
high
RS-232C
and
or
attached
In
addition
(lines
terminal,
(lines
full
RS-232C
lines
carry
an
lines
detail.
document,
you
have
contain
The
this
manual:
NEGATIVE
(These
of
key
they
(about5Vdc).
transmit
NEGATIVE
receive.
to.
the
to
1
and
4,
5,
protocol
which
have
independent
defined,
Forafull
published
2001
access
thorough
following
(-12
Vdc).
terms
telegraphy.)
are
converted
to
TTL
or
receive
pulses
There
information
the
transmit
7),
and
there
and
canputer
6,
8,
20, 22,
also
the
same
set
but
most
Eye
to
are
low
that
is
of
In
the
fact,
very
above.
handshaking
protocol.
requires
expects
to
It
is
directional,
travels
on
protocol
device
short,
of
and
Terminal
given
which
1-4
The
line
kind
terms
real
world,
few
devices
Many
require
lines
In
short,
"full
RS-232C."
receive
important
that
each
line,
specifies
the
type
at
Equiprent,
can
be
of
device.
Data
very
few
devices
even
differently
it
on
to
is,
that
called
the
other
or
determined
one
is
confusing
You
each
line.
understand
the
relative
at
"Data
"DI'E"
require
or
must
protocol
one
end
for
all
even
than
at
specify
that
to
the
end
Communications
there
short.
once
Communication Equipment
require
of
none.
defined
this
most
specifies
ends
of
an
must
The
you
decide
and
the
handshaking
by
time
exactly
of
of
the
RS-232C
be
a
direction
Data
"full
RS-232C"
Further,
RS-232C,
to
say
what
the
RS-232C
which
cable.
cable
Equipment",
device
which
end
Terminal
lines
many
violating
that
a
signals
direction
Therefore,
there
of
the
of
the
of
your'
Equipment
Rev.
protocol.
mentioned
devices
given
it
sends
lines
the
must
or
"DCE"
type
signal
cable
l-B
use
the
device
and
are
signal
the
be
for
"Data
on
has
derive
6/11/80
In
a
a
vector
ZCB
Single
Board Computer
from
communication
involved
when
equipment,
either
one
look
then
on
connection
:port
1.5.5
the
end
end,
the
board
Data
of
the
original
at
connected
when
as
OCE
or
the
other
like
the
RS-232C
the
same
so
that
RS-232C
serial
of
on
:port
this
having
computer.
are
directed
Canmunications
the
canputer
all.
DeE,
lines
can
it
the
line
an
purpose
device
such
Sinceacanputer
to
a modem,
connected
or
DrE. However, a
at
anyone
and
you
toaterminal,
want
connection
and
receiving
be
made,
receives
in
and
ZCB
to
canmunicate
to
the
serial
RS-232C
The
to
standard
cable
the
RS-232C
Equipment.
isaDCE
RS-232C
for
RS-232C -
as
a modem. A
or
it
time.
to
will
not
this
case,
transmits
over
port
DB-25
is
designed
Thus,
port.
can
either
can
given
If
the
connect
VoOrk.
on
the
you
on
an
RS-232C
socket
female
lines
the
play
a
canputer
serial
port
it
Both
same
must
the
so
that
at
the
resulting
to
connect
computer
play
the
:port
happens
to
another
ends
lines.
rewire
lines
line,
on
the
connector,
appropriate
DB-25
a
terminal
the
part
serial
can
does
part
not
of
of
communication
port
only
to
be
OCE
such
VoOuldbetransmi
Before
the
canputer's
specified
you
will
ZCB
board,
to
the
signals
connector
DB-25
socket
a
can
be
wired
wired
for
connect
and
back
as
with
have
terminal,
be
as
a modem,
the
RS-232C
serial
DrE.
To
enable
the
panel
fran
if
it
at
the
to
used
up
up
tting
one
other
were
rear
a
be
as
to
of
the
Drivers
and
Receive
receivers
jl.llTIpering.
to
RS-232C
In
addition,
appropriate
table
the
are
fran
install
control
"Additional
pin
assignments.
available
the
jl.llTIpers
any
Further,
the
standard
output
board,
and
of
lines,
nor
Connections
these
Any RS-232C
for
each
handshaking
output
of
transmitter
are
provided
Data
lines
and
drivers
Whenaserial
lines
3
four
pins
on
the
8251 which
and
two
of
a number
serial
but
are
drivers
on
lines.
line
port,
the
line,
any
two
can
for
the
serial
to
input
are
I/O
or
already
cable
and2respectively.
of
the
RS-232C
on
the
8251.
RS-232C
can
RS-232C
them
I/O
they
8251
and
RS-232C
be
When a
cable's
be
via
of
other
cable
are
and
ZCB
Board"
can
be
can
the
disabled
handshaking
serial
DB-25.
accessed:
line
software.
RS-232C
mentioned
not
connected
receivers
in
connected
be
used
8251
handshaking
:port
output
to
at
RS-232C
connected
is
installed
control
These
drivers
are
DrR,
lines
There
TxRDY, TxMT, SYNDEr
lines
I/O
to
available"
cable
are
enable
are
above.
to
anything
connected
Section
to
to
can
2.4.6
+12
rronitor
be
used
VOC
lines,
or
enabled
by
enable
on
the
these
lines
DSR,
is
installed,
four
other
the
available
These
to
them. The
lists
on
the
in
software
to
control
and
anyone
the
voltage
board,
signals
are
RTS
in
and
8251
are
other
the
board.
lastly,
8251
Transmit
levels.
requiring
are
connected
and
ers.
Section
these
signals
RxRDY.
to
dynamically
on
the
both
than
table
functions
In
anyone
fram
software
the
RS-232C
connected
to
See
2.4.2
signals
available
You
board
input
pads
on
"RS-232C
of
addition,
RS-232C
8251's
incoming
Data
These
no
the
the
for
can
using
and
the
each
the
Rev.
I-B
6/11/80
1-5
Vector
ZCB
Single
Board
Canputer
handshaking
driver
output
available
handshaking
For
be
required
ZCB
board.
input/output
terminals,
To
connect
line.
on
the
large
majority
other
Thus
the
ports
can be connected
to
There
the
is
board which
line.
than
those
serial
without
a modem,
Communications Equipment, a
port.
attaching
same
lines
necessary
connected
addresses
from
devices
having
into
contains
senTice
has
MDOS
System,
Of
For
This
a
thing.
already
as
course,
to
and
vector
which
example,
option
the
serial.
a program
viaamodern
to
be
converted
and
CP/M
output
can
either
Null
However,
connected,
explained
software
the
serial
instructs
Graphic
each
at
C
enables
from
to
printers
be done by changing
Modem
if
Cable
RS-232C
in
port.
you
describe
Vector
the
time
The
Version
that
enables
connected
toamE
Vector
one
of
applications,
already
ports
modification.
with
acoustic
serial
to
then
additional
Section
is
necessary
how
to
the
Graphic
of
this
a
standard
via
port
Graphic,
via
the
spare
RS-232C
can
be used
connected
can
very
little
or
coupler,
port
must be
the
external
handshaking
2.4.5.
in
Section
change them
particular
software
writing,
serial
4
Extended
the
operator
an
RS-232C
first.
and
Vector
serial
receiver
to
connect
no
additional
to
active
often
Most
no
difficulty.
be
serial
or
converted
the
board
DB-25, which
is
required,
modifications
order
2.4
product
gives
as
I/O
any
to
operate
necessary.
addresses
controls
Extended
terminal
Systems
to
communicate
cable
Lastly,
to
operating
Graphic's
port.
and one
RS-232C
used
other
wiring
to
the
standard
to
be plugged
Monitor
the
spare
one
input
lines
components on
as
DeE
RS-232C
printers,
kind
intoaDTE
of
RS-232C
slightly
accanplishes
other
the
specific
board
than
will
devices
I/O
Other
and
documents
peripheral
•.
Systems
Monitor
directly
(any
to
serial
systems
Word
option)
a
time
port
such
Managagment
RS-232C
and one
will
the
and
Data
or
by
the
the
be
port
share
which
as
1.5.6
Parallel
Parallel
34-pin
supplies
connector.
to
below.
output
possible
Microcomputer
Additional
Table
1-6
Ports
The
ZCB
Ports
connector
an
configure
parallel
Each
or,
in
12
in
Input
and
has
three
A,
B and
which
optional
The
other
it
as
desired.
port
in
the
case
Mode0,more
Systems
pins
provide
Section
2.8.
output
independent
C.
They
is
mounted on
34-line
end
of
Many
has
eight
of
Port
are
User's
+5
VDC
is
accomplished
are
ribbon
this
cable
of
pins
C,
available
Manual
and
GND.
parallel
connected
the
top
cable
has
the
34
which
controL
in
Modes
for
more
Exact
using
input
to
the
of
the
that
no
connector
lines
can
are
be
16
different
1 and
information
pin
IN(put)
or
output
outside
card.
connects
on
it,
not
used,
programmed
combinations
2.
See
on
assignments
and
OUT(put)
Rev.
ports,
\\Orld
Vector
to
this
called
via
Graphic
edge
allowing
as
discussed
for
input,
Intelfls 8080
Modes
are
1 and 2.
given
machine
I-B
6/11/80
one
you
are
in
Vector
ZCB
Single
Board computer
language
Output
executed,
until
be
data.
the
written
There
instructions
is
latched
the
eight
bits
computer changes
to
sense
are
in
no
interrupt
within
on
the
of
same
software
board,
data
it.
way
that
lines
so
remain
Input
data
connected
prepared
that
available
is
NOT
is
for
specific
after
to
latched,
available
to
the
an
OUT
the
so
that
and
parallel
applications.
instruction
external
software
to
input
ports.
is
device
must
that
Rev.
I-B
6/11/80
1-7
2.1
vector
ZCB
Introduction
The
User's
tells
how
switches
divided
CPU
into
section,
Single
Guide
to
change
to
fit
3
sections
EPRCM/RAM
Board Computer
II.
explains
various
other
than
to
user
standard
cover
section
USER'S
how
selectable
the
and
I/O
GUIDE
the
board
options
requirements.
three
main
section.
functions
by means
areas
as
manufactured and
of
jumpers
The
User's
of
board
operation:
Guide
and
is
2.1.1
Standard
The
factory
use
the
following
The
standard
jumpering and what
Vector
to
ZCB
fit
Graphic
current
in
another
information
jumpering
2708
2716
EPRCM
lK
on-board
Serial
(Same
Parallel
addressed
Clock
Mwriteis
One
wait
On-board
Phantan
it
ZCB
single
Vector
Graphic
model
will
prove
does
EPROM's
EPRCM
base
the
are
selected
address
merrory
port
is
addressed
information
ports
speed,
A,B,C and
at
08,09,OA and
4MHz.
enabled
state
is
EPRCMisenabled
(line
67)
dces
board computer
Microcanputer
computer
or
useful.
following:
selected
for
is
is
is
for2PRCM
1
PRCM
EOOO.
addressed
at
04(control)
duplicated
Control
OB,
inserted
on
to
is
enabled.
has
been prejumpered
Systems.
one
of
sockets.
socket.
at
FCOO.
at
addresses
Status
respectively.
each
Ml
cycle.
boot
on
reset.
your
and
Register
If
own
design,
05(data)
06
and 07)
are
you
at
wish
the
to
the
2.2
2.2.1
CPU
SECrION
Running system
Jt.nTIper
area
Connections
Function:
operation
operation
Options:
install
Rev.
I-B
selects
but
at4Mhz.
to
a jumper
6/11/80
at2or4MHz.
A
as
manufactured:
2
some
peripheral
operate
bet~en
or4MHz.
at
2
MHZ,
pad 1 and
pad 1 jumpered
operation.
boards
cut
3~·
are
the
to
pad 2
The Z-80
not.
jumper
CPUiscapable
The
board
between
pad1and
is
of4MHz.
shipped
for
2
and
2-1
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