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EM1
8021
EMULATION BOARD
EPROM functional equivalent of 8021 -
single component
8·bit microcomputer
Based
on
8748 - user programmablel
erasable
EPROM 8·bit computer
Operates with
ICE·49™ module to provide
full in·circuit debugging of 8021 prototype
system
Connects to prototype system through
8021
pin compatible plug
On·card 3.0 M Hz or external TTL driven
clock
Portable
4" x 7" microcomputer circuit
assembly
The
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 1 K x 8 mask-programmable
ROM
program memory and
64
by 8
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 ttie
8021:
Zero crossing detector
Crystal controlled clock/buffer
Port
0 simulator
For prototype debugging, the
8748
can
be
removed from its socket
and
replaced with a cable to
an
ICE-49
module.
When used with the
EM1,
ICE-49
module 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
module.
10-17
AFN-00801 A-01