Intel MCS48 User Manual page 434

iny
EM1
8021
EMULATION BOARD
EPROM
functional equivalent
of
8021
—
single
component
8-bit
microcomputer
Based on
8748
—
user programmable/
erasable
EPROM
8-bit
computer
Operates
with ICE-49™
to
provide
full
in-circuit
debugging
of
8021 prototype
system
Connects
to
prototype
system
through
8021
pin
compatible
plug
On-card
3.0
MHz
or external
TTL
driven
clock
Portable 4" x 7"
microcomputer
circuit
assembly
The MDS-EM1
emulator board
is
a ready-to-use 4"
x
7"
microcomputer
circuit
assembly
that
emulates
the
Intel
8021
microcomputer. A
12-inch
flat-cable
assembly connects
the board
to
the 8021
socket
in
a prototype system.
The
board
is
designed so
that
it
can be mounted
either as a stand-alone
unit
or within the
prototype assembly.
The
8021
microcomputer has
1Kx8
mask
programmable
ROM
program
memory
and
64x8 RAM
data memory. The
EM1
is
controlled
by an
Intel
8748, with
1
K
of
EPROM
program
memory
and
a 64-byte data
memory. The
EPROM
can be
programmed
and
erased repeatedly during hardware
and
software development. The EM1
has
several ancillary
circuits
that
perform
the following functions which
are specific
to the 8021:
Zero crossing
detector
Crystal controlled clock/buffer
Port simulator
For prototype debugging,
the 8748 can be removed
from
its
socket and
replaced with a cable
to
an
Intel
ICE-49.
When
used
with the
EM1
,
ICE-49 emulates
the 8021
in real
time, or single steps the 8021 program
at
the user's
command. A
full
range
of capabilities for examining and modifying
8021
memory
and
status are supplied through
ICE-49.
INTEL
CORPORATION ASSUMES NO RESPONSIBILITY FOR THE USE OF
ANY
CIRCUITRY
OTHER THAN
CIRCUITRY
EMBODIED
IN
AN
INTEL
PRODUCT. NO OTHER CIRCUIT PATENT LICENSES ARE WPLIED.
e
INTEL
CORPORATION, 1979
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