Commodore SX-65 Portable User manual

T _ 5 _
1. ^ I ~
- LI
■ i ■ m i - m m ■ l iTi i "J ■ i ■ 3 -
4 Friendly Introduction to Your SX-64 Portable Color Computer
\ commodore
COMPUTER

USER'S GUIDE STATEMENT
"This equipment generates and uses radio frequency energy. If it is not pro
perly installed and used in strict accordance with the manufacturer's instruc
tions, this equipment may interfere with radio and television reception. This
machine has been tested and found to comply with the limits for a Class B
computing device in accordance with the specifications in Subpart J of Part 15
of FCC Rules, which are designed to provide reasonable protection against
such interference in a residential installation. If you suspect interference, you
can test this equipment by turning if off and on. If you determine that there is in
terference with radio or television reception, try one or more of the following
measures to correct it:
• reorient the receiving antenna
• move the computer away from the receiver
• change the relative positions of the computer equipment and the receiver
• plug the computer into a different outlet so that the computer and the
receiver are on different branch circuits.
If necessary, consult your Commodore dealer or an experienced radio/televi
sion technician for additional suggestions. You may also wish to consult the
following
booklet, which was prepared by the Federal Communications Com-
mission:
"How to Identify and Resolve Radio-TV Interference Problems" This booklet
is available from the U.S. Government Printing Office, Washington. D.C. 20402.
Stock No. 004-000-00345-4."
-
-
USER'S GUIDE STATEMENT
"This equipment generates and uses radio frequency energy. 11 it is not pro-
perly install
ed and used in strict accordance with the manufacturer's instruc-
tions, this eq ui pment may interfere with rad io and television reception. This
machine has been tested and found to comply with the limits for a Class B
computing device in accordance with the specifications in Subpart J of Part 15
of FCC Rules, which are designed to provide rea sonable protection against
such interference in a residential installation. If you suspect inte rf erence, you
can test this equipment by turning if off and on. 11 you determine that there is in·
terference w ith radio or television reception, try one or more of the followi ng
measures to correct it :
• reorient the receiving antenna
• move the computer away from the receiver
• change the relative positions of the computer equipment and the recei ve r
• plug the computer into a different outlet so that the computer and the
receiver
are on differe nt branch circuits.
If necessary, consult your Commodore dea ler or an experienced radio/televi-
sion technician for additional suggestions. You may also wish to consult the
following booklet, which was prepared by the Federal Communications Com-
mission:
"H ow to Identify and Res ol ve Radi o· TV Interference Pr ob lem s" Th is booklet
is available from the
U.S. Government Printing Office, Washington, D .C. 20402 ,
Stock No. 004-000·00345·4."

-
-
—
THE INFORMATION IN THIS MANUAL HAS BEEN REVIEWED AND IS BELIEVED TO BE ry
ENTIRELY RELIABLE. NO RESPONSIBILITY, HOWEVER, IS ASSUMED FOR fNACCURACIES.
THE MATERIAL IN THIS MANUAL IS FOR INFORMATION PURPOSES ONLY, AND IS SUBJECT
TO CHANGE WITHOUT NOTICE. __
THIS MANUAL IS COPYRIGHTED AN D CONTAINS PROPRIETARY INFORMATION. NO PART OF
THIS PUBLICATION MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM, OR TRANS
MITTED IN ANY FORM OR BY ANY MEANS. ELECTRONIC, MECHANICAL, PHOTOCOPYING,
RECORDING OR OTHERWISE. WITHOUT THE PRIOR WRITTEN PERMISSION OF COMMODORE
BUSINESS MACHINES. INC ^
Copvrigh!©1983 by Commodore Business Machines. Inc
All rights reserved.
THE I NFORMATION IN THIS MANUAL HAS BEEN REV I EWED AND IS BELIEVED TO BE
ENTIRE L Y R ELI ABLE , NO RESPONSIBI LI TY, HOWEVER, IS ASSUMEO FOR INACCURACIES.
THE M AT ERIA L IN TH IS MAN UA L IS FOR I NFO R MA T ION PURPOSES ONLY, AND IS S UB J EC T
TO CH ANGE WITHOUT NOTICE
TH IS MANUAL IS COPYRIGHTED AND CONTA INS PROP RIETARY INFORMAT ION. NO PART OF
THIS P
UB LICA TION MAY BE REPR OD U CED, STORED IN A RE TRI EVA L SYST EM, OR T RANS ·
M
ITT ED IN ANY FORM OR BY ANY ME ANS, EL ECTRON I C, MECHANICA L, PHOTOCOPY ING,
RECORDING OR OTHERW ISE. W IT HOU T THE PR IOR WRITTEN PERMISSION OF COM!\10DORE
BUSINESS t\. l ACHINES, I NC
CoPVr ighl© l g83 bv Commodore Bu sine ss Ma c hi ne s, Inc
All ngh !s reserved.

TABLE OF CONTENTS
CHAPTER 1
SETTING UP
Unpacking and Setting Up the Executive 64 Computer 3
Transporting
the Executive 64 5
Troubleshooting chart: Executive64 6
Color Adjustment 7
Expanding Your System With Optional Peripherals 9
CHAPTER 2
GETTING STARTED
Communicating with your64: The Keyboard 12
Loading and Saving Programs 17
How to Load Prepackaged Software 18
How to Format a New Disk 19
How to Save Programs 19
Listing a Directory of Programs on a Disk 20
Files 20
Sequential Files 21
Relative Files 24
Random Access File 26
Chart of BASIC Commands for Disks and Printers 30
CHAPTER 3
BEGINNING BASIC
Printing and Calculating 32
Mathematical Functions 33
Multiple Calculations on One Line 35
Execution Order in Calculations 36
Combining PRINT'S Capabilities 37
CHAPTER 4
WRITING SIMPLE PROGRAMS IN BASIC
Line Numbers 39
The GOTO Statement 40
Using the LIST Command 40
Editing Tips 41
How to Use Variables 42
Using FOR...NEXT Loops I...... 45
v
v
v TABLE OF CONTENTS
v CHAPTER 1
v SETTING UP
v
v
v
v
v
v
Unpacking and Setting Up the Executive 64 Computer. . . . . • . •. . . . . . . . .. 3
Transporting the Executi
ve 64 . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . 5
Troubleshooting chart: Executive
64 . . . . . . . .. ......... ... .•.• ...... 6
Color
Adjustment. . . . . . . . . . . . . . . . . . . . . . .. .. ...........•. • . . .. 7
Expanding Your System With Optional Peripherals . . . . . . . • . • . • . . . . . . . 9
CHAPTER 2
GETTING STARTED
Communicating with your 64: The Keyboard . . . . . . . . • . . . . . . . . . . • . • . . .. 12
Loading and Saving P rograms. . . . . . . . . . . . . . . . . . . • . . . . . . . . . . • . . . . .. 17
How to Load Pr epackaged Software . . . . . . . . . . . . • . . . . . . . . • . • . . . . . . .. 1B
How
to Format a New Disk. . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . .. 19
How to Save Programs. . . . . . . . . . . . . . • . . . . . . . . . . • . • . . .. 19
Li sting a Directory of Pr ograms on a Disk . . . . . . . . . . . . . . . . . . . . .. 20
Fil es. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . •... . . ...• . • . . . . . ... 20
Sequential Files ............................•......... .. . .. .... . 21
Relative Files ...........................................•.•.... 24
Random Access File ...................... . . . . . . . . . . • . • . • . . .. 26
Chart of BASIC Commands for Disks and Printers. .. . . • .• ... •. .• . . .. 30
CHAPTER 3
BEGINNING BASIC
Printing and Calculating . . . . . . . . . . . . . . • . . . . . . . • . . . . . . . . . . • . . . . . . .. 32
Mathematical Functions ........... ... ... .. . .. .. ..•...... . ... . ... 33
Multiple Calculations on One Line .............. ..... •.. . . ... .• .•... 35
Execution Order in Calculations . . . . . . . . . . . . . . . . . . . . • . • . • . 36
Combining PRI N T' s Capabilities .....• . . . . ... . ....•. •. .... . ........ 37
CHAPTER 4
WRITING SIMPLE PROGRAMS IN BASIC
Line Number s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . .. 39
The GOTOStatement . . . . . . . . . . . . •. . . . . . . . . . . . . . • . . . . . . . . . . • . • . .. 40
Using the LIST Command ... ....... .. . . ... . . . . • . .. ... •.• . ........ 40
Editing Tips. . . . . . . .......•..............•....... ... . ....... 41
How to Use Variables . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . • . .. 42
Using FO R. .. NEXT Loops .. ...• . . . . .... . .• .•.• ... ...... . • . .... .... 45

CHAPTER 5
ADVANCED BASIC
Introduction 46
Simple Animation 47
INPUT 49
Using the GET Statement for Data Input 51
Using GET to Program Function Keys 52
Random Numbers and Other Functions 53
Guessing Game 55
Your Roll 56
Random Graphics 57
CHAPTER 6
COLOR GRAPHICS
How to Use Colorand Graphics on YourComputer 58
Printing Colors 59
ColorCHRS Codes 61
How to Use PEEKS and POKEs 63
Screen Graphics 64
Screen Memory Map 65
Color Memory Map °6
More Bouncing Balls 67
CHAPTER 7
INTRODUCTION TO SPRITES
Bits, Bytes and Sprites 69
Creating Sprites 7?
More on Sprites: Colors and Extra Movement 78
CHAPTER 8
MAKING MUSIC ON YOUR COMPUTER: FOR
NON-PROGRAMMERS
Structure of a Sound Program 79
Sample Sound Program °^
Playing a Song on Your 64 87
Creating Sound Effects "
CHAPTER 9
ADVANCED DATA HANDLING
READ and DATA Statements 91
Calculating Averages 93
Subscripted Variables 95
Dimensioning Arrays 96
Simulated Dice Roll with Arrays 97
Two-dimensional Arrays "
CHAPTER 5
ADVANCED BASIC
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . 46
Simple Animation . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . 47
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . 49
Using the GET Statement for Data I nput. . . . . . . . . . • . . . . . . . . . . 51
Using GET to Program Function Keys ................•. • ....•. • ..... 52
Random Numbers a nd Other Functi on s ..... ... ..•.. . ... . .• . •. . . .... 53
Guessing Game . . . . . . . . . . . . . . . . . . . . . . . . ............ 55
Your Roll .. . ...... ... ..... .. ..... . ...... • . ... .. .. ... .•... . ..... 56
Random Graphics. . . . . . . • . • . .. . . .. . . . . . • . • . . . .. . . . . . • . . . . . . . . . .. 57
CHAPTER 6
COLOR GRAPHICS
How to Use Colorand Graphics on Your Computer . . . . . . . . . . . . . . • . . . 58
Printing Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Color CHR$ Cod es. . . . . . . . . . . . . . . . . . . . . .. ....... . • . . . . . 61
How to U se PEEK s a nd POKE s. . . . . . . . . . . . . . . . . • . • . . . . . . . . . . 63
Screen Graphics. . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . • . . .
64
Screen Memory Map. . . . . . . . . . . • . . . • . • . . . . . . • . . . • . . . . . . . . . . 65
Color Memory Map . . . . . . . . . . . . . . . . . . • . . . . . . . . • . . . . . . . . . . • . . . . .. 66
More Bouncing Balls . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . • . . . . . 67
CHAPTER 7
INTRODUCTION TO SPRITES
Bi ts, Bytes and Sprites . . . . . . . . . . . . . . . . . . . . . . . . . . • . • . • . . . . . . . . . . .. 69
Creating Sprites . . . . . . . . . . . . . . .. .... ........• . •. . ......• . • . .. 72
More on Sprites: Colors and Extra Movement . . . . . . . . . . . . . . . • . . . • . . . .. 78
CHAPTER 8
MAKING MUSIC ON YOUR COMPUTER: FOR
NON·PROGRAMMERS
Structure of a Sound Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . .. 79
Sample Sound Program . . . . . . . . . . .• . . . • . . . . . . . . • . • . . . . . 85
Playing aSong on Your 64 .. .. .. .. . .. .... .. .. . .. .... .. . 87
Creating Sound Effects . . . . . . . . . . • . • . . . . . . . . • . . . • . . . . . . • . • . • .. 89
CHAPTER 9
ADVANCED DATA HANDLING
READ and DATA Statements . . . . . . . . . . . . . . • . . . . . . . . . . • . . . . . . . . . . 91
Ca lculating Average s. . . . . . . . . . . . . . • . •. . . . . . . . • . . . . . . . . . . . . . 93
Subsc
ri pted Variab le s ............ .. . . . ........•. . ............ 95
Dimensioning Arrays . . . . . . . . . . . . . . . • .
96
Simulated Di ce Ro ll with Arrays . . . . . . . . . . • . . . . . . . . . . 97
Tw o- dimensional Arrays . . . .... ..... ..... .. . • . •. .. . .. . . • . •. .... 99

APPENDICES
Available Software 103
Description of DOS Error Messages 112
Executive 64 BASIC 116
Abbreviations for BASIC Keywords 128
Screen Display Codes 130
ASCII and CHR$ Codes 133
Screen and Color Memory Maps 136
Deriving Mathematical Functions 138
Pinouts
for Input/Output Devices 139
Programs to Try 143
Converting Standard BASIC Programs to Executive 64 BASIC 146
Error Messages 147
Music Note Values 149
Bibliography 152
Sprite Register Map 154
6566/6567 (VIC-II) Chip Register Map 157
Executive 64 Sound Control Settings 158
6581 Sound Interface Device(SID) Chip Specifications 161
Disk and Printer Commands and Statements 163
INDEX
no
v
APPENDICES
Available Softwa re ..................•......... .•.•.. ...... . . . ... 103
Des cription of DOS Error Messages .....•. •. • . •.• .. . . .. •. • .. ... .... 112
Executive 64 BASiC ...... ......... . ............ . ..... 116
Abbreviations for BASIC Keywords . . . . . . . . . . . . . . . . ... 1 28
Screen Display Codes . . . . . . . . . . . . . . . • . • . . . . . .... 130
ASCII and C HR$ Codes ......... ... ......... • .•... . ........ . ..... 1 33
Screen and Color Memory Maps ...... . .. . •.• .•. •. •. . •...•.. . •.. ... 136
De ri ving Mathemalical Funclions ....•.......................•..... 138
Pin outs for Input/Output D ev ices ......... ....... ........ ..... . ..... 139
Programs to Try ..................... .... . ........ ...... .. 143
Converting Standard BASIC Programs to Executive 64 BASIC ......•. .... 146
Error Messages .............. .... ............................... 147
Music Note Va l ues. . . . . . . . . . . . . . . . . . . . . . . . ...... 149
Bibliogr ap hy. . . . . .............. .. • .• .•.• . •.. ..•.• .•.• .. . .... 1 52
Sprite Register Map . . . . . . . . . . . . . . . . • . • . •. . . . ...•... . ... 1 54
6566/6567 (V I C-II) Chip Register Map . . . . . . . . . . . . .. . . ........•..... 157
Executive 64 Sound Control Se ttings ................. . ..... • .•• . ... 158
6581 Sound Interface Device (SID)Chip Specifications ... . . . . • . •. . • .. .. 161
Di sk and Printer Commandsand Statements . . .. . .. . ......... • ..... 16 3
INDEX .... .. ........... ... .... .. ....... .. .. . .. ....... .... .. 170

-
—
-
-
-
-
-
—
-
()
f.1
()
n
n

INTRODUCTION
The Commodore Executive 64 is one of the best values in the home com
puter industry. You can use your 64K color computer for everything from
business applications to household paperwork to exciting games. The 64 offers
you lots of memory (64K), lots of color(16 different colors), lots of sound (music
and sound effects), and lots of fun and practical uses. You can use prepackag
ed software, or you can write your own programs in easy-to-learn BASIC. All
software designed for the Commodore 64 on disk or cartridge also runs on the
Executive 64.
The Executive 64 models (the SX-64 and the DX-64) have all the capabilities of
the best selling Commodore 64, plus one or two disk drives and a 5" color
monitor built-in. The Executive 64 snaps together to form its own carrying case,
and it's light enough to carry and use anywhere.
This easy-to-read user's guide contains all the information you need to set up
your equipment properly, understand how to operate your new SX-64 or DX-64.
and learn how to create your own simple BASIC programs.
This user's guide is intended to introduce you to computers, but it is beyond
the scope of this manual to tell you everything you need to know about com
puters or about BASIC. However, this guide does refer you to a variety of
publications that explain the topics we present here in more detail. These
publications include the Commodore 64 Programmer's Reference Guide and
our Introduction to BASIC series.
For those of you who don't want to learn how to program, you won't have to
search through the whole book to learn how to use Commodore prepackaged
programs and games, or other prepackaged, third party software. We've put all
the information you need to know right up front in Chapters 1 and 2.
SPRITE GRAPHICS
Many exciting features are waiting for you inside your Executive 64. Your
new computer gives you the microcomputer industry's most advanced
graphics, which we call SPRITE GRAPHICS. Sprite graphics let you:
• Design your own pictures in different colors, just like the ones you see on
arcade-type video games.
Animate as many as 8 different overlapping sprites at once.
Double a sprite's size.
Move your creations anywhere on the screen.
Pass images in front or behind each other.
Use automatic collision detection that tells the computer to do whatever you
want when sprites touch each other.
You can use these features to write games and educational software. In addi
tion, you'll see sprites used in the preprogrammed software you buy from Com
modore.
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
INTRODUCTION
The Commodore Executive 64 is one of the best values in the home com·
puter industry.
You can use your 64K color computer for everything from
business applications to household paperwork to exciti
ng games. The 64 offers
yo u lots of memory (64K), lots of color (16 different colors), lots of sou nd (m usic
and sound effects), and lots of fun and practical uses. Yo u can u se prepackag·
ed software, or you can write your own programs in easy·to·learn B AS I C. All
software designed for the Commodore 64 on disk or cartridge al so runs on the
Executive 64.
The Executi ve 64 models (the SX-64 and the DX-64) have all the capabilities of
the best selli ng Commodore 64, plus one or two disk drives and a 5" color
monitor bu ilt·in.The Executive 64 snaps together to fo rm its own carrying case,
and it's light enough to carry and use anywhere.
This easy·to·read user's guide contains all the information you need to set up
your equipment prope
rl y, understand how to operate your new SX-64 or DX-64 ,
and learn how to create your own simple BASIC programs.
This user's guide is intended to introdu ce you to computers, but it is beyond
the scope of this manual to te ll you everything you need to know about com·
puters or about BAS IC. However, this guide does refer you to a variety of
publications that explain the topics we present here in more detail. These
publications include the Commodore 64 Programmer's Reference Guide and
our Introduction to BAS IC series.
For those of you who don't
wan t to l ea rn how to progr am , you won't have to
search through the whole book to learn how to use Commodore prepackaged
programs and games, or ot
he r prepackaged, third party software. We've put all
the information you need to know right up front in Chapters 1 and 2.
SPRITE GRAPHICS
Many exciti ng features are waiting for you ins i de your Executive 64. You r
new computer gives you the microcomputer industry's most advanced
graphiCS , which we call SPRIT E GRAPH ICS . Sprite graphics let you:
• Design yo ur own pictures in different co lor s, just like the ones you see on
arcade·type video games.
o Animate as many as 8 different overlappi ng sprites at on ce.
• Double a sprite's size.
• Move your creations anywhere on the screen.
o Pass images in front or behind each other.
• Use automatic collision detection that tells the computer to do whatever you
want when sprites touch each other.
You can u se these feat u res to w rit e games and educa ti onal softwar e. In addi-
tion, you'll see sprites u sed in the preprogrammed software yo u buy from Com·
modore.

MUSIC SYNTHESIS
The Executive 64 also has built-in music and sound effects that rival many
well known music synthesizers. This part of your computer gives you:
• 3 independent voices, each with a full 9 octave piano-type range.
• 4 different waveforms (sawtooth, triangle, variable pulse, and noise).
• A programmable ADSR (attack, decay, sustain, and release) envelope
generator.
• A programmable high, low, and bandpass filter that you can use for each
voice.
• Variable resonance and volume controls.
If you want your music to play back with professional sound reproduction,
the 64 computers let you connect your audio output to almost any high-quality
amplification system.
LOW-PRICED PERIPHERALS
As your computer needs grow, so can your system. You can expand your
system by connecting your Executive 64 to other pieces of equipment, known
as peripherals, which include accessories like these:
• The VIC-1541 disk drive (as many as five at a time).
• The VIC 1525, 1526, and MPS-801 dot matrix printers, and the 1520
printer/plotter, for printed copies of your programs, letters, etc.
• The 1600 VICMODEM for access through your telephone to the massive
databases of larger computers, and the services of hundreds of specialists
and a variety of information networks.
• The Commodore 1701/1702 color monitor.
• The Z-80 microprocessor, for access to CP/M * *, which offers a variety of ap
plications software.
Commodore wants you to really enjoy your new Executive 64. As you learn,
bear in mind that programming takes time to learn. Be patient with yourself as
you go through the USER'S GUIDE. Before you start, please take a few minutes
to fill out and mail in the owner/registration card that came with your computer.
This will ensure that your new computer is properly registered with Com
modore Headquarters and that you receive the most up-to-date information
regarding future enhancements for your system.
NOTE: Many programs are under development while this manual is being pro
duced. Please check with your local Commodore dealer and with Commodore
User's Magazines and Clubs, which will keep you up-to-date on the many ap
plications programs being written all over the world for the Commodore 64 and
Executive 64.
•Commodore 64 and Executive 64 are trademarks of Commodore Electronics
Ltd.
**CP/M is a registered trademark of Digital Research, Inc. Specifications are
subject to change.
MUSIC SYNTHESIS
The Executive 64 also has built·in music and sound effects that rival many
well known mu sic synthesizers. This part of your computer gives you:
• 3 independent vOices, each with a full 9 octave piano-type range.
• 4 different waveforms (sawtooth, triang le , variable pulse, and noise).
• A programmable
ADSR (attack, decay, sustain, and release) envelope
generator.
• A programmable high, low, and bandpass filter that you can use for each
voice.
• Variable resonance and vo lume controls.
If yo u want your music to play back with professional sound reproduction,
the
64 computers let yo u connect your audio output to almost any high·quality
amplification system.
LOW·PRICED PERIPHERALS
As your computer needs grow, so can your system. You can expand your
system by connecting your Execu
ti ve 64 to other pieces of equ ip ment, known
as p erip her als , which include accessories like these :
• The
VIC·1541 disk drive (as many as five at a ti m e).
• The VIC 152 5, 1526 , and MPS·801 dot matrix printers, and the 1520
printer/plotter, for printed copies of yo ur programs, letters, etc.
• The
1600 VICMODEM for access through your telephone to the massive
databases of larger computers, and the selVices of hundreds of specialists
and a va ri ety of informati on networks.
• The Commodore
1701 /1 702 color monitor.
• The
Z·80 microprocessor, for access to CP/ M" ,which offe rs a variety of ap·
plications software.
Commodore wants you to really enjoy your new Executive 64. As you learn,
bear in mind that programming takes time to learn.
Be patient with yourself as
you go through the USER 'SGUIDE. Before you start, please take a few minut es
to fill out and mail in the owner/registration card that came with yo ur computer
This will ensure that your new computer is properly registered with Com·
modore Hea dq uarters and that you r ece i ve the most up-ta-date information
regarding future enhancements for your system.
NOTE: Many programs are under development while this manual is being pro·
duced.
Pl ease check with your local Commodore dealer and with Commodore
User's Magazines and Clubs, which will keep you up·to·date
on the many ap·
plications programs being written all over the world for the Commodore 64 and
Executi
ve 64.
·Commodore 64 and Executive 64 are trademarks of Commodore Electronics
Ltd.
.. CP/M is a r eg istered trademark of Di gital Research, Inc. Specificatio ns are
subject to change.