'-
>
INDUSTRIAL
MICRO
SYSTEMS.
INC.
MODEL
464
64K
DYNAMIC RANDOM
ACCESS
MEMORY BOARD
***********************************.****************************************.*.
•2MHZ OR 4MHZ OPERATION •
8080
OR
Z80
OPERATION
•PARITY
CIRCUITRY
•
HIDDEN
REFRESH
(Ml
CYCLE)
•PHANTOM LINE
(pIN
67)
•
NO
WAIT
STATES
0•BANK
SELECT
LOGIC •
LOW
POWER
CONSUMPTION
V•FRONT PANEL COMPATIBLE
.6A
+8
VOLTS
•SELECTABLE PORT
ADDRESS
.ZA
+16
VOLTS
'---"
•
AVAILABLE
IN
HK.
48K.
OR
64K
.001A
-
-16
VOLTS
MOOELS
"-'
"
"-
GENERAL
PESCRIPTION
The
Model
464
Dynamic
Ram
Memory
Board
is
fully
buffered
and
uses 16K X 1
bit
dynamic memory
circuits.
The
boards
are
tested
and
burned
in
at
70
degrees
centigrade
under
diagnostic
test
to
insure
reliable
operarions.
The
464
board
may
be
ordered
as a
32K,
48K,
or
64K
memory
board.
In
each
of
these
configurations,
the
memory is
organized
into
16K
byte
banks.
Two
modes
of
operation
are
provided,
Normal Mode and Bank Mode.
In
the
normal
mode,
the
16K
byte
banks
occupy
contiguous
address space.
In
the
bank
mode
of
op~ation,
the
board
is
initially
disabled
and
each
16K
byte
bank
may
be
mapped
into
selected
quadrants
of
memory (see Bank
Selection),
The
464
board
provides
a
"Phantom
Line"
input
for
systems
with
ROM
memories which
utilize
this
feature.
The
user
may also
configure
the
board
to
accept
the
front
panel
deposit
signal,
M-WRITE.
\
INDUSTRIAL
MICRO
SYSTEMS.
INC.
D00464
REV A
8/12/80
Page
1
of
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