Brainboxes IE-340, IE-736, IE-769, IE-780, PC IEEE CARD User Manual

PC IEEE CARD

4.32 EDITION Dec 1994

PC IEEE Reference

Thank You For Buying

PC IEEE 488

Interface!

We proudly present the PC IEEE 488 Interface Board.
PC IEEE 488 gives the PC user precise control over the

huge range of industry standard IEEE 488 devices.

Your board is designed and manufactured in England, and
our policy is one of complete support to our dealers and direct
to our users. Please note, PC IEEE is designed and manufactured
’in house’ and is completely understood by our staff. Its great
strength is the software support we give it. Our intention is to
supply the software and any technical information you may need
to allow you to exercise complete control over the PC IEEE
board and IEEE devices. After searching the manuals, do not
hesitate to contact us on our HOTLINE numbers given on Intro­2 if you need help.

We are particularly keen to provide new operating system
or language drivers to expand the range of applications using our
PC IEEE board.

We trust that if you adhere to the following procedures you
will enjoy many years of useful service from your IEEE 488
interface.

Intro-3

PC IEEE Reference

PC IEEE MANUAL__________________

The Layout Of This Manual._________________________

This manual is a complete description of how to install and

configure the PC IEEE 488 interface board.

The PC IEEE card, like the PC Elite IEEE, is an extremely
easy to use and understand implementation of the IEEE-488
interface for IBM PC and compatible computers. PC IEEE has
truly tamed the PC and the GPIB BUS allowing you to get the
most out of your IEEE devices!

Chapter 1, Welcome To The World Of PC
IEEE

, discusses the features of the PC IEEE card, mentions
programs and languages that will drive the IEEE card and
explains its how its high technology custom design gives it
extreme flexibility in its application and use. Finally, the perfect
companion product for the IEEE card, the Professional 488
Device Driver development environment is introduced.

Chapter 2, Installation Guide, shows you how to

configure the PC IEEE board and install it in one of the
expansion slots of your computer.

Chapter 3, The Technical Details, gives much

technical information on the IEEE card. Whilst most users will
find this information be be unnecessary it is included to make
this manual as complete as possible, to allow you to cover every
eventuality.

The Cumulative Index covers the complete contents of

the manual.

Intro-4

PC IEEE Reference

Contents________

Chapter 1 Welcome To PC IEEE.

Introduction. 1
What Machine Do You Need? 1
PC IEEE Features. 2
Interrupt Selection. 2
Address Switches. 3
Software Support. 3
Introducing Professional 488. 4
Outline. 4
The Professional-488 Environment. 4
Learn How To Use It In Minutes. 5
Basic ON SRQ Facility. 6
PRO-488 Command Summary. 6
Sending Data To Bus Devices. 6
Receiving Data From Bus Devices. 7
Program Examples. 7
Basic Example. 7
Turbo Pascal Example. 7
Microsoft / Lattice C Example. 8
Fortran Example. 8
IEEE Bus Commands And Functions. 8
Complete Documentation and Technical Backup. 9
Cabling Requirements. 9

Chapter 2 Installation Guide.

Introduction. 10
Configuring The PC IEEE Board. 10
The DIP Switches And Jumper Blocks. 11
Setting The I/O Address. 11
Setting The Interrupt Jumper Block. 17
Using More Than One PC IEEE Board. 18
Installing The PC IEEE Board In The Computer. 20
Connecting To IEEE Devices. 22
Problems! 24

Intro-5

PC IEEE Reference
Chapter 2 List Of Figures.

Figure 2-1. Factory Set I/O Address - 0300H. 12
Figure 2-2. I/O Addresses To Avoid. 13
Figure 2-3. Likely I/O Address. 14
Figure 2-4. Valid PC IEEE Base Addresses. 14
Figure 2-5. I/O Address Set To 03E0H. 16
Figure 2-6. I/O Address Set To 0284H. 16
Figure 2-7. The IRQ Jumper Block. 18
Figure 2-8. Remove Cover Mounting Screws. 20
Figure 2-9. Removing The PC Cover. 20
Figure 2-10. Removing Blanking Cover. 21
Figure 2-11. Inserting The PC IEEE Card. 21
Figure 2-12. An IEEE Cable. 22
Figure 2-13. Connecting The PC To The IEEE Bus. 23
Figure 2-14. Standard IEEE 488 Connector Pinouts. 23

Chapter 3 Technical Details.

Introduction. 25
Specification. 25
The PC IEEE Subsets Supported. 26
In/Out Structure. 27
IFC InterFace Clear. 30
REN Remote ENable. 31
SRQ Service ReQuest. 31
ATN ATteNtion. 32

Chapter 3 List Of Figures.

Figure 3-1. PC IEEE Board Interface Capability. 26
Figure 3-2. Pia Input / Output Memory Map. 28
Figure 3-3. Pia DDRA Bit Assignments. 28
Figure 3-4. Pia PRA Bit Assignments. 28
Figure 3-5. Pia CRA Bit Assignments. 29
Figure 3-6. Pia DDRB Bit Assignments. 29
Figure 3-7. Pia PRB Bit Assignments. 29
Figure 3-8. Pia CRB Bit Assignments. 29

Intro-6

World Of PC IEEE. PC IEEE Reference

CHAPTER 1

THE WORLD OF

PC IEEE.

Introduction.____________

This chapter, The World Of PC IEEE, discusses the
features of the PC IEEE card, mentions programs and languages
that will drive the PC IEEE card and explains its how its high
specification custom design whilst retaining exact compatibility
with other manufacturers designs gives it extreme flexibility in
its application and use. Finally, the perfect companion product
for the PC IEEE card, the Professional 488 Device Driver
development environment, which is bundled with every PC IEEE
card, is introduced.

What Machine Do You Need?__________________________

The PC IEEE board and software will run on the IBM PC
and its clones. It will work on any of the industry standard PC,
XT and AT machines including the 286 XT and the COMPAQ
386 computers. The Amstrad PC1512 and 1640 computers,
Olivetti, Tandon, Victor, Commodore and many more are
perfectly at home with our products.

The PC IEEE card will fit in the half size or full size slots
on your computer. You will also need at least one disk drive to
load your software.

You can use any version of DOS 2, DOS 3, DOS 4 or
OS/2.

The PC IEEE board will also fit in the new IBM PS/2

Chapter 1 Page 1

PC IEEE Reference World Of PC IEEE.

Model 30 computer, though be careful to obtain application
software in the 3 1/2 inch disk format. Please ring us if you
have any difficulty doing this.

The PS/2 models 50, 60 and 80 have a Micro Channel
Architecture bus that is different to the PC standard. For these
computers our PS Elite/2 IEEE 488 board is required.

PC IEEE Features._________________

The PC IEEE card extracts the ultimate IEEE-488
performance from your Personal Computer. Using an in house
design we have taken PC based IEEE cards to the limit. PC
IEEE is a half size card that fits any PC or AT slot. PC IEEE
has the complete Controller, Listener and Talker ability. True
flexibility with a choice of 5 interrupt lines and 128 I/O
addresses.

PC IEEE is based on the highly versatile Motorola 68B21
PIA i/o chip, with supporting Texas Instrument IEEE data and
management line drivers and logic chips controlling interrupts,
i/o timing and address decode. The PC IEEE uses an IEEE
standard gold plated R.F.I. shielded plug, and connects directly
to IEEE 488 cables. It is a space saving 4.2 x 5.3 inches overall,
suitable for any length slot in your PC, XT, AT, 386 etc.
Consuming approx 400mA at 5V. It weighs under 0.15kg,

0.35lb. The PC IEEE card is as rugged as your PC.

Interrupt Selection._________________

The interrupt hardware allows jumper selection of one of
five PC interrupt request lines, IRQ2 - IRQ5 & IRQ7. The PC
IEEE interrupt logic allows multiple interrupt sources within the
PC IEEE to share the same IRQ channel. 3 interrupt sources are
software selectable providing very flexible interrupt driven i/o
operations.

Page 2 Chapter 1

World Of PC IEEE. PC IEEE Reference

The PC IEEE does NOT have DMA ability. If you need
DMA driven IEEE handling then use the PC Elite card, this has
DMA interrupt sharing, allowing selection of one of three direct
memory access channels for high speed data transfer exceeding
300K bytes per second.

Address Switches.________________

The DIP switches enable the PC IEEE card to reside at
one of 128 base addresses with the PC, on any 4 byte boundary
within the 0200H to 03FCH ranges. Four PC IEEE cards in your
PC can provide access to 56 IEEE instruments.

Software Support.________________

The low cost and high performance of PC data acquisition
and analysis software packages combined with the PC IEEE card
makes them ideal as powerful and inexpensive instrument
controllers. Keep your technology advancing whilst your capital
investment stays low!

The PC IEEE card comes complete with the easiest to use
PC based IEEE software in the world, the Pro-488 Device
Driver environment. Use Professional 488 to run the PC IEEE
from Basic, Pascal, C, Assembler, Fortran etc. In addition the
Pro-488 system will allow the PC IEEE to emulate a standard
PC parallel printer or serial printer port, thus providing IEEE
plotter support from most standard packages such as Lotus 123,
Autocad, Symphony etc.

Our Premier card, The PC Elite, is guaranteed fully 100%
compatible with Lotus Measure, LabTech NoteBook, Asyst,
DaDisp 488, Test Windows, Unkelscope, TBasic, True BASIC,
National Instruments IEEE software, and all software that
supports the IBM GPIB card.

Please Note that PC IEEE does NOT work with this
software, therefore, if you wish to use these popular data

Chapter 1 Page 3

PC IEEE Reference World Of PC IEEE.

acquisition packages then ask your dealer for a PC Elite IEEE
card.

Introducing Professional 488.__________________________

The perfect partner for the PC IEEE card is Professional­488, the best PC based IEEE software in the world! Pro-488
makes the PC IEEE card an integral part of your PC, controlled
by an enhanced Hewlett Packard style syntax that runs all DOS
languages. Pro-488 makes PC IEEE compatible with BASICA,
GWBASIC, Complied BASIC, Quick Basic, Turbo Basic, Turbo
Pascal, Turbo C, Lattice C, Aztec C, Zortech C, Prospero Pascal,
Microsoft C Pascal, MS Fortran, MS Assembler, FS Fortran and
many more languages.

Outline._______

The Professional-488 software system allows any PC with
an IEEE-488 interface to become an IEEE bus controller,
exercising complete control over a bus full of up to 14 IEEE
instruments. An easy to use, flexible, enhanced industry standard
control language addresses the IEEE devices and provides
complete instrumentation control. The heart of the Professional­488 system is the device driver software that loads automatically
when your PC is switched on. After that, your PC has access to
an IEEE port in the same way as the other resident ports LPT1
or COM1. The Professional-488 Device driver makes full use of
all the advanced features of your PC. We believe that software
sells hardware and that is why we made Professional-488 the
perfect companion for PC Elite IEEE and PC IEEE cards.

The Professional-488 Environment._______________________________

The Profession-488 is the ideal development environment
for IEEE based data acquisition and control. Professional-488 is
more than just an instrumentation shell, its a mature carefully

Page 4 Chapter 1

World Of PC IEEE. PC IEEE Reference

thought out, PC based implementation, of a superset of Hewlett
Packard’s HPIB language. The commands and your programs
read just like plain English and so program development and
maintenance time are cut to an absolute minimum. Since your
time is extremely valuable we made Pro-488 code easy to write,
simple to debug and a pleasure to read. Pro-488 runs identically
across the range of DOS languages. The syntax, parameters and
returns of the Pro-488 system remain the same, independent of
the language that you are running. No extra language drivers or
run time modules are needed to implement a new language. So
you can use the ideal IEEE system with the language of your
choice. The readily available bus status string contains a wealth
of information about the state of the IEEE bus and is easily
processed in any language. Pro-488 is feature rich, with a wide
range of commands, from the lowest level, of individual line
control, right up through single word commands that perform or
initiate whole sequences of bus actions. Its IEEE-488 without the
sweat!

Learn How To Use It In Minutes._____________________________

Since the Professional-488 talks the established IEEE
control language, you probably already know how to use it! A
good way of learning how to use the Professional 488 is inter­actively from the keyboard of your Personal Computer using the
GPIBTALK suit of programs. Included on the Professional 488
system disk is the source code, and the ready run versions of,
GPIBTALK in each of four languages. ATALK in Assembly
language, CTALK, PASTALK and GPIBTALK in GW-BASIC
and BASICA. These powerful programs are a menu driven sys­tem that allows you to send IEEE commands, transmit and
receive data from your bus devices and check the status of the
GPIB interface bus, all at the touch of a single key. In this way
the user can get a good feel of the power and ease of use of the
Professional 488 command language in a very short time. Most
IEEE equipment includes worked examples that are virtually
word for word PRO-488 commands!

Chapter 1 Page 5

PC IEEE Reference World Of PC IEEE.

Basic ON SRQ Facility._____________________

From BASIC the ON PEN GOSUB command can be used
to invoke an SRQ service routine to provide automatic serial
polls etc.

PRO-488 Command Summary.___________________________

The basis of the PRO-488 system is an intelligent
command handler. Data written to the "IEEECTRL" file is
treated as an Ascii string containing IEEE bus keywords and
numeric parameters. These keywords are interpreted as
commands to perform Serial or Parallel Polls, send any IEEE
bus commands or specify the timeout period, etc etc.

The command interpreter checks the syntax of your IEEE
string and performs the appropriate IEEE actions. If a syntax
error is detected the precise location of the error is noted and a
flag is set. Merely checking the error flag informs you whether
any mistake was made, other flags show whether a device is
present on the bus and the state of the data transfer.

Sending Data To Bus Devices.__________________________

Data can be sent to the IEEE bus devices in several ways.
The simplest and most straight forward method is by writing
data to the "IEEEDATA" file, PRO-488 automatically addresses
the current device to listen and the PC outputs your data, as easy
as that!

Alternatively, data can be sent via the "IEEECTRL" file
using one of three methods:- as specified by decimal numbers
after a DATA or EOI command, as literal data within delimiters
after a STRING command, or as literal data within delimiters
after an OUTPUT command.

LISTEN 5 DATA 72,69,76,76,79 UNL <CR>
LISTEN 5 STRING "HELLO" UNL <CR>
OUTPUT "HELLO" <CR>

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World Of PC IEEE. PC IEEE Reference

Receiving Data From Bus Devices.______________________________

Data can be input from the current IEEE bus device by a

read of the "IEEEDATA" file, just like reading disk data!

Alternatively, data can be requested from any IEEE bus

device, via the "IEEECTRL" file using the ENTER command.

ENTER 200 <CR>

Both these methods are very flexible, a complete bus
handshake sequence is performed with the current device being
addressed to talk. The input sequence is terminated by the
receipt of the number of bytes specified or by EOS received.

Program Examples._________________

Here are four example programs that demonstrate the
power and ease of use of Pro-488. Each places a D.V.M. under
PC control, programs the meter’s range and function with the
R3T3X command, inputs a reading then displays it on the PC.

Quick Basic Example.___________________

10 OPEN "IEEECTRL" AS #1
20 OPEN "IEEEDATA" AS #2
30 PRINT#1,"REMOTE 5 OUTPUT ’R3T3X’"
40 READING$=IOCTL$(2)
50 PRINT READING$

Turbo Pascal Example._____________________

VAR

buffer : String[255];
ieeedata,ieeectrl : Text;

BEGIN

Assign(ieeectrl,’IEEECTRL’); Rewrite(ieeectrl);
Assign(ieeedata,’IEEEDATA’); Reset(ieeedata);
Writeln(ieeectrl,’REMOTE 5 OUTPUT "R3T3X"’);
Readln(ieeedata,buffer);
Writeln(buffer);
Close(ieeedata); Close(ieeectrl);

END.

Chapter 1 Page 7

PC IEEE Reference World Of PC IEEE.
Microsoft / Lattice C Example.___________________________

#include <stdio.h>
int ieeedata,ieeectrl;
char buffer[255];
void main(){

ieeedata=open("IEEEDATA",O_RDWR);
ieeectrl=open("IEEECTRL",O_RDWR);
write(ieeectrl,"REMOTE 5 OUTPUT ’R3T3X’\n",24);
read(ieeedata,buffer,255);
printf("%s\n",buffer); }

Fortran Example.________________

CHARACTER BUFFER*255
OPEN(1,FILE=’IEEECTRL’,STATUS=OLD, ACCESS=’SEQUENTIAL’)
OPEN(2,FILE=’IEEEDATA’,STATUS=OLD, ACCESS=’SEQUENTIAL’)
WRITE(1,*)"REMOTE 5 OUTPUT ’R3T3X’"
READ(2,*)BUFFER
WRITE(*,*)’’,BUFFER

IEEE Bus Commands And Functions._________________________________

ABORT Resets bus, pulse IFC, assert REN, assert ATN.
BASE= Sets the PC IEEE board base i/o address.
CLEAR Returns some or all devices to predetermined state.
CONFIGURE Specifies how device responds to PPOLL.
DISABLE Prevents some or all devices responding to PPOLL.
END= Sets End of Sequence method for OUTPUTs.
ENTER Ask for data from IEEE device.
EOS= Specifies EOS byte for IEEE data INPUTs to PC.
INIT Restores IEEE bus and driver to defaults state.
LOCAL Enable front panel control. REN, ATN sent false.
LOCKOUT Disable front panel controls. Performs LLO.
NO TO Disables time out.
OUTPUT Sends literal data string to addressed devices.
PPOLL Performs a complete Parallel Poll
READ Reads one byte of data from addressed talker.
REMOTE Puts some or all devices under PSI BOX control.
SLAVE Puts PC into peripheral mode.
SPOLL Serially Polls one or more devices.
STRING Sends literal data string to current bus device.
TO Sets an i/o timeout value.
TRIGGER Initiates pre programmed action in devices.
UNCONFIGURE Prevents devices responding to Parallel Poll.
WAIT SRQ Waits till SRQ is asserted by device.
WAIT MLA Waits till PC is addressed to listen.
WAIT MTA Waits till PC is addressed to talk.
NO ATN Set ATN false.
NO REN Set REN false.
LISTEN Sends one or more Listen Addresses.
ATN Asserts ATN line true.

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World Of PC IEEE. PC IEEE Reference

CMD Send byte ATN true.
DATA Send byte ATN false.
DCL Device Clear.
EOI Send DATA with EOI true
GET Group Executive Trigger
GTL Go To Local.
IFC Pulse IFC for 100 microsec
LAG Listen Address.
LLO Local Lockout.
MLA Set/ Send My Listen Address.
MTA Set/ Send My Talk Address.
MSA Set/ Send My Secdry Address.
PPC Parallel Poll Configure.
PPD Parallel Poll Disable.
PPE Parallel Poll Enable.
PPU Parallel Poll Unconfigure
REN Asserts REN line true.
SDC Select Device Clear.
SEC Secondary Address.
SPD Serial Poll Disable.
SPE Serial Poll Enable.
TAD Sends Talk Address.
TALK Sends Talk Address.
TCT Take Control.
UNL Unlisten.
UNT Untalk.

Complete Documentation and Technical Backup.__________________________________________

We believe in supplying complete documentation with
every package we sell. The Professional 488 Driver is no
exception, it has an attractively layed out manual in an A5
binder with slip case, containing nearly 400 pages of in-depth
technical detail with comprehensive indexes and table of
contents. We guarantee your Professional 488 Driver for a full
36 months from purchase. A full technical backup service is
available to ensure that you get the maximum performance out
of your investment.

Cabling Requirements.____________________

Try our low profile fully shielded IEEE cables, ideal for
the cramped spaces on the back of some very popular clones.

Chapter 1 Page 9

PC IEEE Reference Installation Guide.

CHAPTER 2

PC IEEE

INSTALLATION

GUIDE.

Introduction.____________

This chapter explains how to configure the PC IEEE 488
board and install it into an IBM PC computer. Detailed
instructions are given how to set the address select and interrupt
acknowledge DIP switches and how to position the IRQ and
DMA jumpers.

If the PC IEEE is to be installed in another make of PC
then it may be necessary to consult the instructions included in
that PC’s documentation.

The half size PC IEEE board will fit into both long or a
short slots, it can be placed in standard 8 bit PC slots or in the
longer 16 bit AT slots.

If you have a Micro Channel Architecture computer such
as the IBM PS/2 Models 50, 60 or 80 or a Tandy 5000 M.C.
then you require the PS Elite/2 card instead.

Configuring The PC IEEE Board.______________________________

In the state it leaves our factory, the PC IEEE 488
Interface Board is ready to plug straight into an IBM PC
computer.

So, unless you have GOOD REASON, you do not need to
alter its default setting.

Page 10 Chapter 2

Installation Guide. PC IEEE Reference

However, due to the large variety of add-on boards that
may be present in the PC, your PC IEEE board may need
tayloring to suit your setup.

The DIP Switches And Jumper Blocks.__________________________________

The PC IEEE card has one 8 way DIP switch block, the
switches are clearly marked 1-8. DIPs 2-8 select the PC IEEE
card base address whilst DIP 1 is a don’t care switch. Make
certain that DIP 1 is set ON for compatibility with future
versions of the PC IEEE.

The PC IEEE card has an IRQ jumper block. This IRQ
jumper block, can be set to produce IRQ interrupt signals - such
as when an IEEE device asserts its Service Request line, SRQ,
to signal that it has data ready for the PC. There is no DMA
facility on the PC IEEE card, if your application requires DMA
then use the PC Elite IEEE interface.

The base address and IRQ options are communicated by
the user to the computer using the Professional 488 Device
Driver software or via your third party IEEE software using its
own set up or configuration routine.

It is worth noting that the standard PC IEEE cannot be
made to emulate the IBM or National Instruments GPIB board,
neither can it be set to i/o address 02E1h. If you must have a
board that emulates IBM’s please use the PC Elite IEEE
interface - contact your dealer for one.

The PC Elite IEEE i/o address map is identical to the IBM
GPIB and National Instruments GPIB PC2A board and it will
run ALL software that these boards run. IBM’S GPIB, N.I.’S
PC2A, the PC IEEE and the PC Elite cards can all co-exist
happily in the same computer provided that they are set to
different i/o addresses.

Setting The I/O Address.______________________

By referring to the PC IEEE card locate the I/O Address

Chapter 2 Page 11

PC IEEE Reference Installation Guide.

DIP switches at the upper left hand corner of the board.

The PC IEEE board i/o address can be set be set to reside
at any 4 byte boundary within the address space 0200h to
03FFh. The factory set address, 0300H, is set as shown in
Figure 2-1. The DIP switch numbers 2-8 refer to the I/O address
lines A2 - A8 of the computer. Since the PC IEEE card requires
an address space 4 bytes wide, only address lines A2-A8 have
any effect on the cards I/O address. Consequently A0 and A1
are not connected to the address decoder. DIP 1 is a DON’T
CARE switch, always set DIP 1 ON!

Figure 2-1. Factory Set I/O Address - 0300H._______________________________________

1 Don’t care. so set ON.

³

2-8 Address select

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Factory Set Default Address= 0300 Hex. Always set DIP 1 On!
Factory Set IRQ jumper select = None

If you need to run the board at a different address then set
the dip switches accordingly. In all, the PC IEEE may be set to
one of 128 possible i/o addresses. There are certain address that
it is always good to avoid, these are given in the following table.

Page 12 Chapter 2

Installation Guide. PC IEEE Reference

Figure 2-2. I/O Addresses To Avoid._______________________________

I/O ADDRESS NORMAL USE.___________ ___________
0201H- 0201H Game Control Adapter
0278H- 027FH *** Second Printer Port Adapter
02C0H- 02C7H A.S.T. Clock Calendar Chip
02E1H *** PC ELITE IEEE Board.
02E1H IBM/ National Instruments IEEE card.
02F8H- 02FFH *** Second Serial Port Adapter
0300H- 0303H *** PC IEEE Board
0308H- 030FH *** PC DIO48 Board
0310H- 031FH *** PC Timer-DIO Board
0320H- 032FH Hard Disk
0340H- 0360H *** PC DIO192 Board
0360H- 036FH PC Network
0378H- 037FH *** Printer Port Adapter
0380H- 038CH S.D.L.C. Communications
0380H- 0389H Second Binary Sync Comms
0390H- 0393H Cluster
03A0H- 03A9H Primary Binary Sync Comms
03B0H- 03BFH Monochrome Display and Printer Card
03C0H- 03CFH Enhanced Graphics Adapter Extra I/O
03D0H- 03DFH Colour Graphics Adapter
03F0H- 03F7H 5.25 inch Disk Drive Adapter
03F8H- 03FFH *** Serial Port Adapter

*** These cards available from us.

If any of these adapter cards are installed in the PC DO

NOT set the PC IEEE card to reside in the same address range.

Among the i/o addresses that are likely to be good for the
PC IEEE are shown in Figure 2-3. However, we cannot
guarantee that they are not already in use by some other adapter
that may be installed in your PC.

Chapter 2 Page 13

PC IEEE Reference Installation Guide.

Figure 2-3. Likely I/O Address.___________________________

I/O ADDRESS NORMAL USE.___________ ___________
0204H- 0277H Unused.
0280H- 02BFH Unused.
02C8H- 02DFH Unused.
02E4H- 02F7H Unused.
0300H- 031FH Unused.
0330H- 035FH Unused.
0380H- 03AFH Unused Usually.
03E0H- 03EFH Unused.

If in doubt check the manuals of the adapters installed in

the PC.

Remember, only DIP switches 2-8 have any effect on the
PC IEEE card. It is straight forward to work out the I/O address
since DIP switch 2 is connected to address line A2 and so on till
address line A8 is connected by DIP switch 8. The ’ON’
marking on the DIP switch is a misnomer since the address line
is selected low in the ON position.

In all the PC IEEE may be set to one of 128 possible i/o
addresses. Only a representative sample are given.

Figure 2-4. Valid PC IEEE Base Addresses.______________________________________

DIP 2 DIP 3 DIP 4 DIP 5 DIP 6 DIP 7 DIP 8 Card Base Address_____ _____ _____ _____ _____ _____ _____ _________________
On On On On On On Off 0300H Default

Off On On On On On Off 0304H
On Off On On On On Off 0308H
Off Off On On On On Off 030CH

On On Off On On On Off 0310H
Off On Off On On On Off 0314H
On Off Off On On On Off 0318H
Off Off Off On On On Off 031CH

Page 14 Chapter 2

Installation Guide. PC IEEE Reference

On On Off Off On On Off 0330H
On On On On Off On Off 0340H
On On Off On Off On Off 0350H
On On On On On Off Off 0380H

On On Off On On Off Off 0390H
On On On Off On Off Off 03A0H
On On On Off Off Off Off 03E0H See Fig 2-5
On Off On Off Off Off Off 03E8H

On On On On On On On 0200H
Off On On On On On On 0204H
On Off On On On On On 0208H
Off Off On On On On On 020CH

On On Off On On On On 0210H
Off On Off On On On On 0214H
On Off Off On On On On 0218H
Off Off Off On On On On 021CH

On On Off Off On On On 0230H
Off On Off Off On On On 0234H
On Off Off Off On On On 0238H
Off Off Off Off On On On 023CH

On On On On Off On On 0240H
Off On On On Off On On 0244H
On Off On On Off On On 0248H
Off Off On On Off On On 024CH

On On Off On Off On On 0250H
On On On On On Off On 0280H
Off On On On On Off On 0284H See Fig 2-6
On On Off On On Off On 0290H
On On On Off On Off On 02A0H
On On Off Off On Off On 02B0H
On On Off On Off Off On 02D0H

Figure 2-5 shows how the DIP SWITCHES are set to

select i/o address 03E0h.

Chapter 2 Page 15

PC IEEE Reference Installation Guide.

Figure 2-5. I/O Address Set To 03E0H.__________________________________

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Figure 2-6 shows how the DIP SWITCHES are set to select i/o
address 0284h.

Figure 2-6. I/O Address Set To 0284H._________________________________

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off ”12345678”

¨

ДДДДДДДД

…

If you have set the board at a different address then you will
need to inform the software that you intend to run about the new
i/o address.

If you using the Professional 488 Device Driver software,
that comes bundled with the PC IEEE, then to inform the driver
of the change in i/o address send the BASE=03E0H, using the
appropriate address, command to the driver by placing it on the
CONFIG.SYS invocation line eg

DEVICE=IEEE.SYS /BASE=03E0H

or after boot time by writing to the IEEECTRL file. The BASE=
command causes the IEEE card to be initialised and it will
become the system controller, the IFC line will be pulsed and
ATN and REN asserted true.

Page 16 Chapter 2

Installation Guide. PC IEEE Reference

Other software packages, which may have been supplied
with your IEEE instrumentation, have their own configuration
routines. See the instructions that come with that IEEE software.

Setting The Interrupt Jumper Block.________________________________

The movable jumper on the jumper block is used to
specify which hardware interrupt is to be generated by SRQ,
ATN or IFC transitions on the IEEE bus.

Most user will not require IRQ’s and so should leave the
IRQ jumper in the factory set, off, position.

The range of instructions controlling the enabling and
servicing of an interrupt are described in your IEEE software
manual. The position of the jumper MUST match the IRQ level
set in the software. If in doubt leave the jumper in the factory
set, off, position.

Moving the jumper pin selects which interrupt is invoked
by the IEEE board hardware. The jumper can be in one of six
positions. See Figure 2-7.
NOTE: Do not add an extra jumper of your own across the______
jumper block it will only cause great confusion.

Chapter 2 Page 17

PC IEEE Reference Installation Guide.

Figure 2-7. The IRQ Jumper Block._______________________________

NORMAL USE OF INTERRUPT.________________________

ЪДДДДДД¿
³

:::::

Þ³

FACTORY SET POSITION. NO IRQ.

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³

::::

Þ:³

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АДДДДДДЩ
ЪДДДДДД¿
³

:::

Þ

::

³

IRQ7 PARALLEL PRINTER PORT.

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³

::

Þ

:::

³

IRQ5 HARD DISK.

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³

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::::

³

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³Þ

:::::

³

IRQ3 RS232C SERIAL PORT NUMBER 2-8.

АДДДДДДЩ

Select the IRQ line required by placing the jumper across

the appropriate pins.

If in doubt leave in the jumper in the factory set condition.

Using More Than One PC IEEE Board.__________________________________

Since each PC IEEE card can control up to 14 separate
IEEE devices it is not generally necessary to have more than one
PC IEEE board installed in the PC at any one time. However, it
is possible to control multiple IEEE buses from one Personal
Computer by installing several PC IEEE cards each controlling
its own IEEE bus.

The golden rules to follow to allow this are:­i.) Ensure that each PC IEEE card is set to a different i/o

Page 18 Chapter 2

Installation Guide. PC IEEE Reference

address.

ii.) If you are using the Professional 488 Device Driver, that

comes bundled with the PC IEEE card, then ensure that the
each PC IEEE card has its own driver software installed
and that the file name associated with each IEEE port is
different.

The Professional 488 device Driver requires that the
CONFIG.SYS file must have an DEVICE= IEEE.SYS statement
included for each PC IEEE card in use. Each statement must
give the individual card i/o address and file name. E.g. A PC
with three PC IEEE cards controlling three separate IEEE 488
buses of up to 14 devices each might have the following
CONFIG.SYS file.

DEVICE=IEEE.SYS
DEVICE=IEEE.SYS /"IEEE2 ","IEEEDAT2","IEEECTR2",@0310h
DEVICE=IEEE.SYS /"COM1 ","IEEEDAT3","IEEECTR3",@0320h

In this case the first time IEEE.SYS is loaded it creates a
device driver which accesses a PC IEEE card at i/o address
0300h with filename IEEE, the data filename is ’IEEEDATA’
and the control filename is ’IEEECTRL’.
The second time IEEE.SYS is loaded it creates a device driver
which accesses a PC IEEE card at i/o address 0310h with
filename IEEE2, the data filename is ’IEEEDAT2’ and the
control filename is ’IEEECTR2’. The third time IEEE.SYS is
loaded it creates a device driver which accesses a PC IEEE card
at i/o address 0320h with filename COM1, the data filename is
’IEEEDAT3’ and the control filename is ’IEEECTR3’.

Chapter 2 Page 19

PC IEEE Reference Installation Guide.

Installing The PC IEEE Board In The Computer.___________________________________________

NOTE: Always turn the computer OFF before installing or______
removing any interface board from the computer.!!!

After having made sure that the i/o address and the IRQ
and DMA jumpers are correctly set now is the time to insert the
PC IEEE board into the i/o connector slots in the computer.

STEP 1 Before the PC IEEE board can be installed the
power to the PC MUST be switched OFF!

Figure 2-8. Remove Cover Mounting Screws._______________________________________

STEP 2 Then

using a screw
driver, remove the
cover mounting
screws on the back
panel of the PC
system unit.

Figure 2-9. Removing The PC Cover.________________________________

STEP 3 Next, remove the PC’s cover by sliding it forward and

up. It usually helps to disconnect the keyboard from the PC
since it tends to get in the way when the case is removed.

Page 20 Chapter 2

Installation Guide. PC IEEE Reference

Figure 2-10. Removing Blanking Cover.__________________________________

STEP 4 Choose an empty

expansion slot. The PC IEEE
488 interface board will fit
either a full length or a short
slot, a 8 bit PC type slot or a
16 bit AT type slot. In general
it is wise to leave the larger
slots free for those boards that
insist on greater room.
Remove the blanking cover
protecting the slot on the PC
back panel. KEEP the blanking
cover screw safely for later.

Figure 2-11. Inserting The PC IEEE Card._____________________________________

STEP 5 Now insert the PC

IEEE 488 card in the slot. Be
careful to ensure that the gold
plated pcb fingers fits neatly
into the i/o expansion
connector. Press down firmly
but evenly on the top of the
PC IEEE card.

STEP 6 The 24 way standard
IEEE 488 connector should fit
neatly through the slot’s
aperture to the outside world.

Use the screw kept back from the blanking cover to screw the
PC IEEE 488 interface retaining bracket into the PC back panel
housing.

Chapter 2 Page 21

PC IEEE Reference Installation Guide.
STEP 7 Now replace the system units cover by carefully sliding

in down and back over the system unit. Replace the cover
mounting screws.

STEP 8 After attaching all the monitor and keyboard cables, put
the MS DOS disk in drive A: and power up the PC. Do not
forget the mains power cable!

The PC should power on in the normal way.

Connecting To IEEE Devices.__________________________

The PC IEEE board connects to IEEE 488 devices using
standard IEEE cables as shown in the Figure below.
You may find that our special low profile IEEE cable fits better!

Figure 2-12. An IEEE Cable._________________________

These cables can be ’piggy
backed’ together to daisy chain
up to 14 IEEE devices to the
PC. Connect one end of the
IEEE cable to the IEEE
device.

Our Low profile IEEE cables,
NOT shown, are ideal for
connecting to those tight fitting
clones! Ask you dealer today!

Page 22 Chapter 2

Installation Guide. PC IEEE Reference

Figure 2-13. Connecting The PC To The IEEE Bus.____________________________________________

Connect the other end of the
IEEE cable to the 24 way
IEEE connector on the back of
the PC. Be sure to tighten the
screw locks to ensure a good
permanent connection.

Figure 2-14. Standard IEEE 488 Connector Pinouts._____________________________________________

Pin 1 Data bit 0 Pin 13 Data bit 4
Pin 2 Data bit 1 Pin 14 Data bit 5
Pin 3 Data bit 2 Pin 15 Data bit 6
Pin 4 Data bit 3 Pin 16 Data bit 7
Pin 5 EOI Pin 17 REN
Pin 6 DAV Pin 18 Ground
Pin 7 NRFD Pin 19 Ground
Pin 8 NDAC Pin 20 Ground
Pin 9 IFC Pin 21 Ground
Pin 10 SRQ Pin 22 Ground
Pin 11 ATN Pin 23 Ground
Pin 12 Shield (GND) Pin 24 Ground

Chapter 2 Page 23

PC IEEE Reference Installation Guide.

Problems!_________

If the system fails to power up normally check the
following.
i.) Ensure that the PC IEEE 488 interface card is installed

correctly.
ii.) Ensure that other cards in the PC have not been upset.
iii.) Ensure that the power is connected and the PC is

switched ON!
iv.) Ensure that the IRQ jumper block is set correctly (default

NO IRQ).
v.) Ensure that the PC IEEE i/o address is set correctly

(default 0300h).

If all these have been checked and the PC still does not
power up the there is probably a conflict of i/o address between
the PC IEEE board and another board in the PC. Ask your
dealer to check this.

Page 24 Chapter 2

Technical Details. PC IEEE Reference

CHAPTER 3

PC IEEE

TECHNICAL

DETAILS.

Introduction.____________

This chapter describes the technical details of the PC IEEE
interface. In particular, how the 68B21 peripheral interface
adapter is configured as an IEEE controller chip is described.
This information is only of use to people who are dedicated to
understanding everything in their computer or for those writing
IEEE i/o routines at the assembler level. It is of no concern to
the average or more than average user, who will be accessing
the card via Professional 488 or software bundled with his IEEE
instruments.

Specification.____________

The PC-IEEE interfaces is totally consistent with all
electrical, mechanical and functional specifications of the IEEE
488 and ANSI MC1.1 standards. The PC IEEE card is
compatible with all revisions of the IEEE 488 standard,
including 1975, 1978 and IEEE 488A-1980 supplement. It is also
totally consistent with the electrical and functional specifications
of the IEC 625-1 and BS6146 standards, a simple mechanical
adapter is available to interconnect the PC IEEE with IEC 625
devices.

IEEE standard 728-1982 is a recommended practice for
code and format conventions for use with IEEE 488. PC-IEEE is
perfectly compatible with this set of operational specifications.

Chapter 3 Page 25

PC IEEE Reference Technical Details.

The PC IEEE board is capable of a maximum data transfer
rate of 250K bytes/second. The actual data transfer rate is
dependent on the PC’s clock rate. On an 10MHz PC AT or 286
XT the maximum data transfer rate is 200k bytes per second, on
a 4.77MHz PC the maximum data transfer rate is 20K bytes per
second. Of course, the data is actually transmitted at the speed
of the SLOWEST addressed listener or talker. The positive 3
wire handshake ensures that data is transmitted correctly and
without loss.

The IEEE-488 Standard defines the following cabling
restrictions.

1). Not more than 20 metres between the most distantly

separated devices.

2). A maximum of 15 devices resident on the bus at the same

time.

The PC IEEE Subsets Supported._____________________________

The IEEE-488 standard specifies various allowable subsets
of interface functions. The actual codes supported by the PC
IEEE board is shown below.

Figure 3-1. PC IEEE Board Interface Capability.__________________________________________

CODE CAPABILITY DESCRIPTION____ __________ ___________
SH1 Source Handshake. Complete capability.
AH1 Acceptor Handshake. Complete capability.
T7 Talker Function. Basic Talker,

Extended Talker and Talk Only Mode,

TE7 Extended Talker. Unaddress if MLA.
L3 Listener Function Basic Listener, Extended Listener, and

Listen Only Mode,

LE3 Extended Listener Unaddress if MTA.

Page 26 Chapter 3

Technical Details. PC IEEE Reference

C1 Controller Function. System Controller.
C2 Controller Function. Send IFC and Take Charge.
C3 Controller Function. Send REN.
C4 Controller Function. Respond to SRQ.
C9 Controller Function. Send Interface Messages.

Parallel Poll.
Pass Control.
Receive Control.
Take Control Synchronously.

E1 Open Collector Driver. 250 kilobytes per second maximum speed.

The functions supported by the PC IEEE board are a
comprehensive group allowing full control of the IEEE bus. The
PC IEEE has complete controller capabilities and also
implements the full range of talker, listener, serial and parallel
poll, service request, and remote programming functions.

In/Out Structure._______________

The computer controls the state of the IEEE lines through
an Motorola MC68B21 PIA chip, this does not connect directly
to the IEEE lines but is buffered through two IEEE line drivers
that provide the correct signal levels and line matching. The line
drivers used are the Texas Instruments SN75160 and SN75161
IEEE driver chips. These control the IEEE data and IEEE line
management respectively. The operation of these devices is NOT
trivial and should only be attempted by competent personnel who
are in possession of the device data books. These books are :­"8-Bit Microprocessors Data Manual" from Motorola
Semiconductors and "The Texas Instruments Interface Circuits
Data Book." Briefly, you must set BOTH the PIA and the line
drivers to the appropriate input or output state, then set the
required lines either HIGH or LOW. Then perform the
appropriate IEEE handshake by setting the management lines
high and low at the correct time.
Alternatively handshake the data or commands out of or in to
the computer using the jump table. The jump table, accessed via
the device driver, does provide complete control of all possible
IEEE functions. The SN75160 and SN75161 line drivers are

Chapter 3 Page 27

PC IEEE Reference Technical Details.

configured using four control lines, TE and PE 75160 and TE
and DC for the 75161. PE is permanently tied LOW. The two
TE lines are tied together thus leaving 2 controls into the PIA.

When using the jump table or Professional 488 device
driver it is NOT be necessary to alter the TE or DC lines as
these are set by the called routines to match the function
selected, ie input or output.

Figure 3-2. Pia Input / Output Memory Map._______________________________________

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Page 28 Chapter 3

Technical Details. PC IEEE Reference

Figure 3-5. Pia CRA Bit Assignments._________________________________

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Note 1: The IEEE input-output must be done at the i/o______

address set by the DIP switches on the PC IEEE
board. The above i/o map is relative to the base
address set by these switches. I.E. If you are using

Chapter 3 Page 29

PC IEEE Reference Technical Details.

the factory set address 0300H then DDRA is at
0300H and CRB is at 0303H.

Note 2: ATN has two lines into the computer, the CA7 line______

is an input only line and is used in conjunction with
the IRQ jumper block to enable the computer to
handshake data from an external controller i.e.
computer can be programmed to act as peripheral.

Note 3: For additional information on use of the MC68B21______

see "8-Bit Microprocessors Data Manual" from
Motorola Semiconductors.

It is recommended that you do NOT attempt to handshake data
into and out from the IEEE bus using your own software
routines as the IEEE bus structure is complicated. Instead use
the high level function in the Pro-488 DOS Driver or, for greater
speed, access the jump table provided at a fixed offset from the
start of the resident Pro-488 driver. However, some users may
wish to to control non standard IEEE 488 instrumentation and
therefore require access to some of the IEEE lines directly.

IFC InterFace Clear.___________________

The IFC control line is connected to CA2 of the PIA.
When the computer is acting as the system controller, ie ALL
THE TIME in normal use, the IFC line can be asserted by
pulling CA2 low. In practice, this line should only be toggled
low for short time and then returned high. The standard pulse
time is a minimum of 100 micro second.

In normal use IFC is permanently held HIGH. This is the
most sensible approach and will be found to be satisfactory to
all.

If you are using software that configures the PC IEEE as
an IEEE device then IFC can be used to produce an interrupt.
An IRQ to interrupt the processor can be generated by IFC
transitions when ALL the following conditions are met.

i.) PC IEEE board configured as an IEEE device, use

the SLAVE command for this.

Page 30 Chapter 3

Technical Details. PC IEEE Reference

ii.) IRQ jumper block set in accordance with the special

IRQ handler software routines.
iii.) CRA register setup appropriately.
iv.) The correct interrupt vector in the PC’s memory is

’stolen’ and redirected to a handler.

All this is pretty esoteric and only of interest to the odd user.

REN Remote ENable.___________________

To program REN for receive the data direction bit in
DDRB must be set LOW. REN is bit 1 of PORT B.
To program REN for transmit the data direction bit in DDRB
must be set HIGH. Setting bit 1 of PORT B HIGH sets REN
HIGH. Setting bit1 of PORT B LOW sets REN LOW. The
SLAVE command turns the REN line around from the normal
transmit output mode to receive input use.

SRQ Service ReQuest.____________________

The SRQ line is bit 7 of PORT B. This is normally set for
input and the current state of the SRQ line can be read directly
from here. There is an SRQ input only line connected to CB1 of
the PIA. This line can only detect strobe pulses on the SRQ line,
NOT its current.

The SN75161 only allows SRQ receive when the computer
is acting as the system controller, ie ALL THE TIME in normal
use. To send SRQ use the SLAVE command to turn around the
SRQ direction and then use the SRQ, NO SRQ commands or
write directly to PRB.

An IRQ to interrupt the processor can be generated by
SRQ transitions by appropriate setting of CRB. Otherwise SRQ’s
can be detected by polling the IRQB1 flag in bit 7 of CRB of
the PIA. Thus the PC IEEE can send a service request to an
external device and can easily detect them.

Chapter 3 Page 31

PC IEEE Reference Technical Details.

ATN ATteNtion._______________

The IEEE ATN line has TWO connections into the PIA
and hence the computer. This permits many useful extra
functions to be incorporated into the IEEE interface. The normal
ATN signals are sent from the computer through PORT B bit 6
and are controlled by the device driver. There is also an ATN
input only line connected to CA1 of the PIA. If you want the
computer to act as a peripheral, ie a pseudo disk drive or printer
say then DC should be set HIGH. To turn ATN round from
send to receive use the SLAVE command.

An IRQ to interrupt the processor can be generated by
ATN transitions generated by an external controller (another
computer, say) by appropriate setting of CRA. Otherwise ATN’s
can be detected by polling the IRQA1 flag in bit 7 of CRA of
the PIA. The IRQ or polling routine must recognise the PC
IEEE’s device number, this to prevent interference with other
devices on the bus. The device number is set by using the
MLA=, MSA=, MTA= and MYA= commands. Once a valid
device number has been detected the user handshakes the data in
or out of his computer using the device driver. Best response is
with the IRQ jumper block and corresponding interrupt vector
stolen to point to an input handshake routine. Alternatively the
WAIT MYA or WAIT MLA etc commands followed by a
SEND or READ command can be used to build IEEE device
functions into the PC IEEE.

Page 32 Chapter 3

Index PC IEEE Reference

Index.______

Abort.................................8

Ascii..................................6

Asyst.................................3

Automatic.........................6

Automatic serial polls.......6

Backup..............................9

Base address.....................11, 14, 29

Base=................................8, 16

Buffer................................7

Cable.................................22, 23

Clear................................. 8, 9, 30

Com1................................4, 19

Commodore......................1

Config.sys.........................16, 19

Configure..........................8, 9, 10

Connecting........................22, 23

Cover................................20, 21, 22

Dadisp...............................3

Data transfer rate..............26

Dav................................... 23

Default..............................10, 12, 14, 24

Device clear......................9

Device=............................19

Direct................................3

Disable..............................8, 9

Disk..................................1, 2, 5, 7, 13, 18, 22, 32

Dma..................................3, 10, 11, 20

Dma interrupt....................3

Elite..................................3, 4, 11, 13

Enable...............................3, 8, 9, 30, 31

Eoi....................................6, 9, 23

Error..................................6

Index 1

PC IEEE Reference Index

File name..........................19

Filename...........................19

Format..............................2, 25

Fortran..............................3, 4, 8

FS Fortran.........................4

Function............................7, 26, 27, 28, 30

Future versions.................11

Gpibtalk............................5

Gtl.....................................9

Guarantee..........................9, 13

Handshake........................7, 26, 27, 30, 32

Handshakes.......................32

Hard disk.......................... 13, 18

I/o address.........................8, 11, 12, 13, 14, 15, 16, 18, 19, 20,

24, 29

Ibm gpib............................3, 11

Ibm ps/2............................1, 10

Ieee commands.................5

Ieee functions....................27

Ifc......................................8, 9, 16, 17, 23, 27, 30

Installation........................10

Instrument.........................2, 3

Int......................................8

Interface clear...................30

Interrupt............................2, 3, 10, 11, 17, 18, 30, 31, 32

Interrupt sharing...............3

Irq..................................... 2, 10, 11, 12, 17, 18, 20, 24, 30, 31,

32

Irq jumper block...............11, 18, 24, 30, 31, 32

Lotus.................................3

Lotus 123..........................3

Lotus measure...................3

Low profile.......................9, 22

Lpt1..................................4

Index 2

Index PC IEEE Reference

Memory............................3, 28, 31

Micro channel...................2, 10

Microsoft..........................4

National instruments.........3, 11, 13

Ndac..................................23

Nrfd..................................23

On srq...............................6

Open................................. 7, 27

Os/2..................................1

Parallel printer..................3, 18

Pascal................................3, 4, 7

Pc ieee...............................1, 2, 3, 4, 8, 10, 11, 12, 13, 14, 16,

18, 19, 20, 21, 22, 24, 25, 26, 27, 29,

30, 31, 32

Pc2A.................................11

Plotter............................... 3

Poll....................................8, 9, 27

Printer...............................3, 13, 18, 32

Pro-488.............................3, 4, 5, 6, 7, 30

Professional 488...............1, 3, 4, 5, 9, 11, 16, 19, 25, 28

Prospero............................4

Ps/2...................................1, 2, 10

Quick basic.......................4

Screws..............................20, 22

Service request..................11, 27, 31

Speed................................3, 26, 27, 30

Srq....................................6, 8, 11, 17, 23, 27, 31

Syntax error......................6

Technical details...............25

Version.............................1

Write.................................5, 31

Index 3

PC IEEE Reference Index

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Index 4