Vector Graphic 48K Dynamic Memory Board Manual
Y8K
Dynamic
Memory
Board
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DYNAMIC MEMORY BOARD
:opyright
Revision
February
1979
7,
Vector
3
1979
Graphic
Inc.
Copyright
1979
by
Vector
Graphic
Inc.
The
at
on
revi
revision
the
t
he
sed.
Revision
bottom
Title
3 -
number
of
each
page
2/7/78
Revision
and
date
page.
corresponds
of
The
Numbers
release
revision
to
that
of
each
number
of
the
page
and
page
!1erein
date
most
of
r
The
48K
Dynamic
faults
and
including
merchantability.
INC.,
customer,
contain
the
48K
will,
repair
defects
1.
Dynamic
2.
defect
claimed
3.
GRAPHIC,
GRAPHIC,
repair
INC.,
INC.,
or
replacement
RAM
Board
without
any
any
implied
warranty,
warranty
However,
for
a
period
or
replace
in
materials
Such
defect
RAM
Board
in
left
VECTOR GRAPHIC,
The
within
48K
to
Dynamic
at
customer's
confirm
ten
if
(10)
found
REPAIR
sold
the
above
of
ninety
any
48K
or
workmanship,
material
the
INC.,
days
RAM
Board
the
to
AGREEMDIT
hereunder
either
of
notwithstanding,
(90)
Dynamic
or
workmanship
VECTOR
is
after
is
expense,
alleged
be
in
order.
is
expressed
fitness
days
RAM
provided:
GRAPHIC,
given
its
promptly
for
defect,
sold
for
"as
intended
following
Board
existed
INC.,
notice
discoverYi
returned
examination
and
is",
or
VECTOR
delivery
that
is
at
factory;
of
the
for
subsequent
with
implied,
use
GRAPHIC,
found
the
time
precise
to
VECTOR
by
VECTOR
all
or
to
to
Repair,
workmanship
forth
expense,
Buyer's
or
correction.
after
in
addition
INC.,
for
required
correction
expiration
INC.,
and
the
GRAPHIC,·
VECTOR
replacement
which
above
will
provided
expense,
expiration
to
the
the
repair
first
rate.
thereafter.
of
defects
of
the
will
submit
VEc'rOR GRAPW'::,
written
estirn:::lce
INC.,
GRAPHIC,
VECTOR GRAPHIC,
correct
returned
its
prior
Repair
GRAPHIC,
any
option
to
Agreement
48K
with
also
commencing
INC.
wi
are
be
performed
the
to
VECTOR
In
performing
of
the
cost
At
hour,
period
to
Buyer a written
INC.,
of
sj
gned
INC.,
INC. I shall
Dynamic
approval
require
work.
void
thin
ten
or
correction
discovered
48K
GRAPHIC,
period
of
the
and
$18.00
Prior
in
material
for
will
charges
by
to
commence
RAM
to
prepayment
if
the
(10)
of
after
by
VECTOR GRAPHIC,
Dynamic
RAM
INC.,
any
repair,
set
forth
parts
present
the
time
per
to
commencing
or
no-cost-to-Buyer
estimate
not
commence
has
been
duly
authorized
with
have
Board
proceed,
no
until
obligation
and
of
enclosed
days
of
any
defects
expiration
Board
for
such
replacement
above,
then-current
the
applicable
hour
for
any
workmanship
repairs,
of
repa.ir
returned
representative
the
the
written
VECTOR
the
estimated
card
end
is
not
consumer
is
returned,
repair,
Buyer
every
repair,
the
by
repair
to
GRAPHIC,
returned
purchase.
1n
material
of
the
period
INC.,
at
Buyer's
also
replacement
or
correction
will
be
charged
VECTOR GRAPHIC,
rate
hour
is
of
$35.00
work
replacement
discovered
v~CTOR
expected
until
such
Buyer
after
GRAPHIC,
charges,
time
to
VECTOR
authorizing
work
repair,
estimate
repair
involved.
replace
has
INC.
I may
charges
to
been
VECTOR
or
set
at
or
as
or
at
Vector
Graphic
Section
48K
Dynamic
RAM
Rnn~~
TABLE OF CONTENTS
1
1.
II.
III.
rrable
of
Introduction
1.1
1.2
Theory
of
2.1
2.2
User's
Guicle...................................
3.1
3.2
3.3
3.4
3.5
Contents.
•.
Description
Description
Operation
The
48K
Board
The
Refresh
Modifications
Z-80
Board
3.1.
3.1.
The
READY
Using
Address
Memory
D~lA
of
Test.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
the
of
of
Board
this
•••
Manual.
.................................
1
2
Li
.......
the
Circuitry
Feature
to
the
•••••.•.••..••
Refresh
Reset
ne
•••••••
II
......
Board.
Circuitry.
•••..••.••.••••.
of
the
48K
Board
Signal.
Z-80
Board
and
the
. . . . . . . . .
•..
••.•
••••
. • • 4
• • • 8
••
••
1
2
. 2
2
3
3
.6
.6
.6
'7
.8
.8
.8
IV.
V.
VI.
Spec:.fications
Memory
Schematic
Chip
•••.••••••••••
.•••••
Locations
•.
..10
.11
••
12
nevision
2
1/12/78
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