DP8344 datasheet(179/184 Pages) NSC

179 / 184 page

60 Reference Section (Continued)

64 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 DemonstrationDevelopment Kit and the

DP8344 BCP Multi-Protocol Adapter (MPA) DesignEvalua-

tion Kit

641 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

642 DemonstrationDevelopment Kit

The DemonstrationDevelopment 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 monitordebugger 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 monitordebugger program displays

internal register contents and status information It also pro-

vides functions such as execution break points and single

stepping

643 Multi-Protocol Adapter (MPA)

DesignEvaluation 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 designevaluation 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

644 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

StateTiming 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

65 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

many of these products we do not provide technical sup-

port or in any way guarantee the functionality of these prod-

ucts

651 Crystal Supplier

The recommended crystal parameters for operation with the

DP8344 are given in Section 224 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 188696 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

NEL Frequency Controls Inc

357 Beloit Street

Burlington Wisconsin 53105

(414) 763-3591

652 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

CT-109 is a single

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 32703299 (Coax) and

5250 (Twinax) line monitor Their Coax Scope and Twinax

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