dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 179

• Manufacturer Part Number: dp8344b
• Description: Biphase Communications Processor?bcp
• Manufacturer: National Semiconductor Corporation

6 0 Reference Section
6 4 DEVELOPMENT TOOLS
National Semiconductor provides tools specifically created
for the development of products that use the DP8344
These tools consist of the DP8344 BCP Assembler System
the DP8344 BCP Demonstration Development Kit and the
DP8344 BCP Multi-Protocol Adapter (MPA) Design Evalua-
tion Kit
6 4 1 Assembler System
The Assembler System is an MS-DOS compatible program
used to translate the DP8344’s instruction set into a directly
executable machine language The system contains a mac-
ro cross assembler link editor and librarian The macro
cross assembler provides nested macro definitions and ex-
pansions to automate common instruction sequences and
source file inclusion nested conditional assembly which al-
lows the assembler to make intelligent decisions concerning
instruction sequence based on user directives The linker
allows relocatable object sections to be combined in any
desired order It can also generate a load map which details
each section’s contribution to the linked module The librari-
an allows for the creation of libraries from frequently ac-
cessed object modules which the linker can automatically
include to resolve references
6 4 2 Demonstration Development Kit
The Demonstration Development kit is a cost effective de-
velopment tool that performs functions similar to an in-cir-
cuit emulator The kit developed by Capstone Technology
Inc Fremont California consists of a DP8344 based devel-
opment board a monitor debugger software package Na-
tional Semiconductor’s DP8344 video training tapes and all
required documentation The development board is a full
size PC card that contains a 22 square inch area for logic
prototype wiring The monitor debugger program displays
internal register contents and status information It also pro-
vides functions such as execution break points and single
stepping
6 4 3 Multi-Protocol Adapter (MPA)
Design Evaluation Kit
The Multi-Protocol Adapter (MPA) is a PC expansion card
that emulates a 3270 or 5250 display terminal and supports
industry standard PC emulation software The MPA comes
in a design evaluation kit that includes the hardware sche-
matics and PAL equations and software including all the
DP8344 source code This kit was produced to provide a
blueprint for PC emulation products and a cornerstone for
all 3270 and 5250 product development using the DP8344
The code was developed in a modular fashion so it can be
adapted to any 3270 or 5250 application
6 4 4 DP8344 BCP Inverse Assembler
The DP8344 BCP Inverse Assembler is a software package
for use in an HP 1650A or HP1651A Logic Analyzer or in an
HP16500A Logic Analysis System with an HP 16510A
State Timing Card installed The inverse Assembler was de-
veloped by National Semiconductor to allow disassembly of
the DP8344 op-code mnemonics This allows one to deter-
mine the actual execution flow that occurs in the system
being developed with the DP8344
6 5 THIRD PARTY SUPPLIERS
The following section is intended to make the DP8344 Cus-
tomer aware of products supplied by companies other than
National Semiconductor that are available for use in devel-
oping DP8344 systems While National Semiconductor has
supported these ventures and has become familiar with
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179
many of these products we do not provide technical sup-
port or in any way guarantee the functionality of these prod-
ucts
6 5 1 Crystal Supplier
The recommended crystal parameters for operation with the
DP8344 are given in Section 2 2 4 Any crystal meeting
these specifications will work correctly with the DP8344
NEL Frequency Controls Inc Burlington Wisconsin has
developed crystals the NEL C2570N and NEL C2571N
specifically for the DP8344 which meet these specifications
The C2570N and C2571N are both 18 8696 MHz funda-
mental mode AT cut quartz crystals The C2571N has a
hold down pin for case ground and a third mechanical tie
down NEL Frequency Controls Inc is located at
6 5 2 System Development Tools
The DP8344 with its higher level of integration and process-
ing power has opened the IBM mainframe connectivity mar-
ket to a wider range of product manufacturers who until
now found the initial cost and time to market prohibitive
This wider base of manufacturers created the opportunity
for a more extensive line of development tools that dealt not
only with the use of the DP8344 but also with the implemen-
tation of the 3270 and 5250 protocols While National Semi-
conductor is dedicated to providing the Customer with the
proper tools in both areas we also have aided and encour-
aged a number of third party suppliers to offer additional
development tools This has further provided an avenue for
faster and more reliable product development in this prod-
uct area The development tools discussed in this section
are controller emulators and line monitors for the IBM 3270
3299 and 5250 protocols
A controller emulator is a device that emulates an IBM 3x74
cluster controller or a System 3x controller With the
DP8344 both of these controllers can be emulated with the
same piece of hardware The controller emulator allows the
designer to issue individual commands or sequences of
commands to a peripheral This is very useful in characteriz-
ing existing equipment and testing of products under devel-
opment Capstone Technology offers such a product Their
Extended Interactive Controller part
PC expansion card that can emulate both 3270 and 5250
control devices (the 3x74 and System 3X respectively)
Newleaf Technologies Ltd Cobham Surrey England and
Azure Technology Inc Franklin Mass also supply prod-
ucts in this area Newleaf Technology offers the COLT52 a
twinax controller emulator and Azure Technology offers a
controller made with their CoaxScope and TwinaxScope
line monitors
A line monitor is a device that monitors all the activity on the
coax or twinax cable The activity includes both the com-
mands from the controller and the responses from the pe-
ripheral These devices typically decode the commands and
present them in an easy to read format The individual trans-
missions are time stamped to provide the designer with re-
sponse time information The line monitors are very useful in
characterizing communications traffic and in determining
the source of problems during development or in the field
Azure Technology offers both a 3270 3299 (Coax) and
5250 (Twinax) line monitor Their Coax Scope and Twinax
NEL Frequency Controls Inc
357 Beloit Street
Burlington Wisconsin 53105
[phone]
CT-109 is a single