Commodore 2040 User manual

User's Manual
for
CBM 5Y4-inch
Dual
Floppy Disk
Drives
ell commodore

User's Manual
for
CBM Dual Drive
Floppys
Model 2040-Model 4040
Model 3040-Model 8050
Appropriate for use with:
Commodore Computers
• Series 2001 (CBM-PET)
•
Series 3000 CBM)
• Series 4000 PET)
• Series 8000 CBM)
Part Number 320899
October 1980
(I[ commodore
©1980 Commodore Business Machines, Inc.

Chapter 1
Chapter 2
Chapter 3
Table of Contents
Page
Introduction. ............................................. 1
General Information .................................... 2
Description ........................................... 3
Front Panel 3
Back Panel 3
Interior Configuration 4
The Diskette .................................. 5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Care Of The 2040, 3040, 4040 and 8050 . . . . . . . . . . . . . . . . . . . . 9
Care
Of The Diskettes 9
Unpacking The Disk Drive 9
Preparing To
Use Your Disk Drive 11
Connecting The Disk Drive To The Computer 11
Performing The Power-On Test 12
Inserting The Diskette Into The 8050 13
Inserting The Diskette Into The 2040, 3040 and 4040
.. 13
The 4040 and 8050 Performance Test 14
The 2040 and 3040 Performance Test 17
Learning How To
Use Your Floppy Disk Drive 21
The Block Availability Map (BAM) 22
The Disk Operating System (DOS) ,22
Disk Maintenance Commands. ..........................
.. 23
NEW 24
HEADER (BASIC 4.0 Direct Command) . .
.. 25
Initialization (2040 and 3040) ..................
.. 25
Initialization (4040) ..........................
.. 26
Initialization (8050) ..........................
.. 26
The Directory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 26
LOAD$ 26
DIRECTORY (BASIC 4.0 Direct
Command). 27
Printing The
Directory. . . . . . . . . . . . . . . . .. 27
iii

IV
Chapter 4
Chapter 5
Chapter 6
VALIDATE.................................. 28
COLLECT (BASIC 4.0 Direct Command). .
.. 28
DUPLICATE 28
BACKUP (BASIC 4.0 Direct Command). . .
.. 29
COpy 29
COpy (BASIC 4.0 Direct Command) ..... .. 31
CONCAT (BASIC 4.0 Direct Command). . .
.. 31
RENAME 31
RENAME (BASIC 4.0 Direct Command) . .
.. 32
SCRATCH 32
SCRATCH (BASIC 4.0 Direct Command). .
.. 33
BASIC Commands For Data Handling 35
BASIC Commands Associated with Floppy Disk Drives .......
.. 35
SAVE and DSAVE (Writing aProgram
to aDiskette) . .. 36
LOAD and DLOAD (Reading aProgram from a
Diskette) 36
VERIFy..................................... 37
OPEN 38
DOPEN 39
CLOSE...................................... 39
DCLOSE 40
Closing The Command Channel 40
Closing The Data Channel 41
PRINT# . . . .
.. .. .. . . .. ...... .. .. .. . .. 41
INPUT# 42
GET# 43
RECORD# 43
Quickload Feature (BASIC 4.0)
.. ....................... .. 44
Moving aTape Program
to Disk 45
Advanced Disk Programming 47
Commodore Disk Operating System (DOS) 47
Disk Utility Command Set .............................
.. 48
BLOCK-READ................................ 49
BLOCK-WRITE. .......
.. .. .. . . .. . . .. .. .. ... .. 50
BLOCK-EXECUTE 50
BUFFER-POINTER ..........................
.. 50
BLOCK-ALLOCATE "
.. ............ .. . .. 51
MEMORy 51
MEMORY-WRITE
51
MEMORY-READ. ................... .. 52
MEMORY-EXECUTE 52
USER....................................... 52
8050 Disk Zones 59
Advanced File Handling ...................................
.. 65
Special Open and Close Statements For Direct Access ........
.. 65
Random Access Example . . . . . . . . . . . . . . . . . . . . . .
.. 66
To Create AFile .....................
.. 66
To Add A
Record. ................... .. 67
To See ARecord 68
To Change ARecord 68
Getting The Directory of Listings . . . . . . . .
.. 69

Chapter 7
Chapter 8
Chapter 9
Chapter 10
Ending The Program . . . . . . . . . . . . . . . . . .
.. 69
Relative Files 4040, 8050 . . . . . . . . . . . . . . . . . . . . . .
.. 69
Creating ARelative File
.. . . . . . . . . . . . . . . . . . . . . . .. 72
Expanding ARelative File 72
Accessing ARelative File . . . . . . . . . . . . . . . . . . . . . .
.. 73
Simplifying The
Use of Commodore Disk-Related Commands. . . . . . .. 77
Loading The
DOS Support Program . . . . . . . . . . . . . . . . . . . . . . .. 77
Using The
DOS Support Symbols: >and @ . . • • . • • . • . • . • • . • .• 78
Loading AProgram With The 1. . . . . . . . . . . . . . . . . . . . . . . . . .
.. 78
Loading And Running AProgram With
Up Arrow .. . . . . . . . . . .. 79
Special
DOS Support Information 79
Error Messages -Pattern Matching File Names -Disk Commands. . .
.. 81
Requesting Error Messages: Commodore Disk Drives. . . . . . . . .
.. 81
Summary Of
CBM Floppy Error Messages 82
Description of
DOS Error Messages 82
Pattern Matching 85
User's Quick Reference: Disk Commands. . . . . . . . . . . . . . . . . .
.. 86
Random 1.00 Program Listing 89
Index , . . . . . . . . . . . . . . .
.. 95
List of Illustrations
Figure Title
Page
1Models 2040, 3040, 4040, 8050: Rear View 5
2Floppy Disk Hookup 12
3Position For Diskette Insertion 13
4
2040,3040,4040 Format: Expanded View of ASingle Sector 62
58050 Format: Expanded View of ASingle Sector 63
List of Tables
Table Title Page
1Suggested Reading List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2Specifications: Model 8050 Dual Drive Floppy Disk 6
3Specifications: Models 2040/3040 Dual Drive Floppy
Disk. . . . . . . . . . 7
4Specifications: Model 4040 Dual Drive Floppy Disk 8
5Standard Jump Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 53
6Block Distribution
By Track 54
7
2040,3040 BAM Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 55
8
2040,3040 Directory Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 55
94040
BAM Format. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .. 56
10 4040 Directory Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 56
11 8050 Directory Header
Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 57
12 8050 BAM Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 58
v

vi
13
14
15
16
17
Directory Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 60
Sequential Format
61
Program File Format 61
Relative File Format 70
User's Quick Reference -Disk Commands 87

Chapter 1
INTRODUCTION
The disk-oriented Commodore Computer System was designed around the central concept
of providing you, the user, with large file-handling capabilities supported by
BASIC pro-
gramming commands and further simplified by
DOS Support command abbreviations.
Read the Table of Contents and become acquainted with the broad scope of material
covered
in this manual. It has been designed to assist you in pursuing an educational pro-
gram by utilizing the computer
as an adjunct to the learning process. That is, once the disk
drive
is properly interfaced to aCommodore Computer, YOU become as important an ele-
ment of the system
as the hardware. Your importance, however, is measured in direct rela-
tionship
to how well you understand how to effectively utilize the hardware and software.
That's why it
is best to think of your computer and disk drive as only part of asystem.
Grasping and understanding the concept that each individual component acts and reacts to
signals and commands from other devices in the system will greatly accelerate your funda-
mental grasp of how
to operate, control, and master the system. This basic concept forms
the basis of this manual: teaching you how to gain mastery of the system so that it will
perform as desired. That
is the primary reason this manual is laid out in abuilding block
fashion: it permits you
to advance as fast as you desire.
The first chapters discuss basic hardware features and permit you, right from the start,
to
become familiar with the disk drive by doing the performance tests which comprise the first
essential "hands
on" experience. Then, by actually using your particular disk drive and
learning
to carefully follow instructions, you can gain confidence in order to proceed to
more comprehensive subjects.
By the time you begin Chapter 3-Learning How To Use Your Floppy Disk Drive-you will
have already used some portions of the
DOS Support system which is not fully described
until Chapter 7. The reason for this procedure lies within the purpose of
DOS Support:
simplifying commands.
It is actually easier to instruct anew user by using the simplified
command structure of
DOS Support than attempting to explain the entire command hier-
archy at an early stage. This concept of providing you with enough essential information
to
complete atask, astep-by-step description of the task, and meaningful examples is afeature
of this manual which will provide you with sufficient incentive to actually complete the
task.
1

2
The manner in which this manual
is laid out encourages the concept of learning by doing.
Difficult concepts and procedures have been broken down
into steps that walk the user
through examples which provide ample
opportunity to experiment later by returning to
each command description. When possible, the command format has been included with the
command description and, as an additional aid, aUser's Quick Reference has been placed in
Chapter 8for easy access if problems persist.
Error messages are also presented in Chapter 8where
they can be quickly referenced, if
needed. The Error Message discussions have been expanded
to include:
•How
to request error messages.
•Error message summary.
•Detailed error message descriptions.
For those users who have been reluctant to attempt disk programming because of the pre-
sumed degree
of difficulty, note that the entire disk command hierarchy is structured in this
manual from least difficult
to more complex:
•Commands for file manipulation and maintenance
•Commands for
data handling
•Advanced programming
•Advanced file handling
•Simplified commands
Users who have
attained some degree of programming skills may desire to begin with the
advanced subjects such as random access or relative files while others may be content with
just following
the manual's format. In either case, this manual has been laid out to provide
the user with essential information in alogical sequence. Follow the examples, attempt the
step-by-step procedures, and learn by doing.
GENERAL INFORMATION
With the purchase of your Commodore Dual Drive Floppy Disk you have greatly enhanced
the computing power of your Commodore system. To get the most out of your system you
should study your computer's user guide, and if necessary the BASIC manuals listed in
Table 1. You will benefit most if
you first read through this entire manual, taking note of
those features that relate to your particular floppy as well as those which are common to all
CBM Floppys.
The information presented in this manual is extensive and may, in some cases, present in-
formation
that is currently beyond your particular level of expertise. However, by carefully
and thoughtfully studying its
contents you will gain the confidence necessary to progres-
sively upgrade
your programming skills and expertise.
This manual presents discussions, descriptions, practices and procedures relating
to the use
and operation
of all Commodore 5-1I4-inch Dual Floppy Disk Drives.
Four models are discussed:
Model
2040 (DOS 1)
Model 3040 (DOS 1)
Model 4040 (DOS2)
Model
8050 (DOS 2.5)

The floppys are operationally compatible with the following Commodore Computers.
1. Series 2001 -16K and 32K -Operating With BASIC Version 3.0
2. Series 2001 -PET 8K -Upgraded to BASIC Version 3.0
3. Series 3000 -16K and 32K -Operating
With BASIC Version 3.0
4. Series 4000 -PET 8K, 16K, and 32K -Operating
With BASIC Version 4.0
5. Series 8000 -32K -Operating
With BASIC Version 4.0
For ease of reference, the Models 2040,
3040,4040, and 8050 Dual Drive Floppy
Disks will
be referred to in this manual as "the 2040", "the 3040", "the 4040",
and
"the 8050", respectively. All descriptions and discussions are common unless
noted otherwise.
DESCRIPTION
All CBM Floppys described in this manual are dual-drive diskette storage devices. Their
individual primary components consist of read/write controls, drive motor electronics, two
drive mechanisms, two read/write heads, and track positioning mechanisms.
All disk drives
discussed
in this manual conform to IEEE-488 interface requirements. Because each device
is an "intelligent" peripheral, their operation requires no space in the computer's memory.
This means you have just
as much computer memory available to you as when you do not
have the disks attached.
Front Panel
The front panel of the respective disk drive consists of an identification panel across the top;
slots
in which to insert two diskettes; and doors to close after inserting the diskettes. When
the door is closed, the diskette is clamped onto the diskette spindle hub. Also on the front
panel are three LED indicator lights. The one on the right
is called the Drive 0Active Indi-
cator, and lights when drive 0
is active. The LED on the left does the same for drive 1. On
the 8050, the LED in the middle is atwo-color power/error indicator. It is normally green,
indicating power
ON but flashes red whenever adisk error occurs. On the 2040, 3040, and
4040 the middle LED
is activated if power is applied or removed, and whenever an error
occurs.
Back Panel
The back of each disk drive contains an IEEE-488 interface connector. Near the panel's
lower edge
is the power ON/OFF switch. There is also a"slow blow" fuse, and the AC
power cord.
3

4
Table 1. Suggested Reading List
PetICBM Personal
Computer Guide.
C. S. Donahue and J. K. Enger, Osborne/McGraw-Hill, 630 Bancroft Way,
Berkeley,
CA 94710
Hands-On Basic with aPet.
H. D. Peckham, McGraw-Hill,
1979
Entering BASIC.
J. Sack and
J. Meadows, Science Research Associates, 1973
BASIC: A Computer Programming Language.
C. Pegels, Holden-Day, Inc., 1973
BASIC Programming.
J. Kemeny and T. Kurtz, Peoples
Computer Co., 1010 Doyle (P.O. Box
3100), Menlo Park, CA
94025, 1967
BASIC FOR HOME COMPUTERS.
Albrecht, Finkle
and Brown, Peoples Computer Co., 1010 Doyle (P.O. Box
3100), Menlo Park,
CA 94025, 1973
AGuided Tour of Computer Programming in BASIC.
T. Dwyer, Houghton Mifflin Co.,
1973
Programing Time Shared Computer in BASIC.
Eugene H. Barnett, Wiley-Interscience, LIC 72-175789
Programming Language #2.
Digital Equipment Corp., Maynard, MA 01754
101 BASIC Computer Games.
Software Distribution Center, Digital
Equipment Corp., Maynard, MA 01754
What do To After You Hit Return.
Peoples Computer Co., 1010 Doyle (P.O. Box 3100), Menlo Park, CA 94025
Basic BASIC.
James
S. Coan, Hayden Book Co., Rochelle Park, NJ
WORKBOOKS
1-5.
T.I.S., P.O. Box 921, Los Alamos, NM 87544
Programming the 6502.
R. Zaks, Sybex, 1978
24 Tested, Ready-to-Run Game Programs in Basic.
K. Tracton, Tab Books, 1978
Some Basic Programs.
M. Borchers and R. Poole, Osborne &Assoc. Inc., 1978
Basic Programming for Business.
I. H. Forkner, Prentice-Hall, 1977
The Channel Data Book.
B. Lewis, 5960 Mandarin Ave., Goleta, CA 93017,1978
PET and the IEEE 488 Bus (GPIP).
Osborne/McGraw-Hill, 630 Bancroft Way, Berkeley, CA 94710
Interior Configuration
The interior of your floppy contains two disk drives. All the logic for the disk drive is con-
tained within
the unit. The mechanical devices are, for the most part, located beneath the
disk spindles.

The Diskette
The diskette (also known as aminifloppy, floppy diskette, minidiskette, etc.) is similar to
the standard flexible disk. There are several reputable manufacturers of the 51/4-inch
diskettes. You should make sure that you buy diskettes for SOFT SECTORED FORMAT.
Your Commodore dealer can supply your needs.
Specifications
Table 2presents the specifications for the 8050, Table 3the specifications for the 2040 and
3040, and Table 4the 4040.
Figure 1 - Models
2040, 3040, 4040, 8050: Rear View
5

Table 2. Specifications: Model 8050 Dual Drive Floppy Disk
STORAGE:
6
Total capacity
Sequential
Relative
Directory entries
Sectors per track
Bytes per sector
Tracks
Blocks
IC's:
Controller
6502
6530
6522
Interface
6502
6532
(2)
6564 (2)
Shared
6114 (8)
PHYSICAL:
Material
Dimensions
Height
Width
Depth
ELECTRICAL:
Power requirements
Voltage
Frequency
Power
MEDIA:
Diskettes
533248 bytes per diskette
521208 bytes per diskette
464312 to 517398 bytes per diskette
depending upon file size.
182880 bytes per file
65535 records per file
224 per diskette
23 to 29
256
77
2083
microprocessor
I/O, RAM, ROM
I/O, interval timers
microprocessor
I/O, RAM, interval timers
RO~v1
4x1K RAM
18 gao steel
6.5/1
15.0/1
14.35/1
100,117,220, or 240 VAC
50 or 60 Hertz
50 watts
Standard mini 5 1/4", single sided,
single
density

Table 3. Specifications: Models 2040/3040 Dual Drive Floppy Disk
STORAGE:
Total capacity
Sequential
Random
Directory entries
Sectors
per track
Bytes per sector
Tracks
Blocks
IC's:
Controller
6504
6530
6522
Interface
6502
6532
(2)
6332 (2)
Shared
6114 (8)
PHYSICAL:
Material
Dimensions
Height
Width
Depth
ELECTRICAL:
Power requirements (2040)
Voltage
Frequency
Power
Power requirements (3040)
Voltage
Frequency
Power
MEDIA:
Diskettes
176640 bytes per diskette
170180 bytes per diskette
170850 bytes per diskette
152 per diskette
17 to 21
256
35
690
microprocessor
I/O, RAM, ROM
I/O, interval timers
microprocessor
I/O, RAM, interval timers
ROM
4xlK RAM
18 gao steel
6.5"
15.0"
14.35"
120 VAC
60 Hertz
50 Watts
100, 220, or 240 VAC
60 Hertz
50 Watts
Standard mini 5
1/4", single sided,
single density
7

Table 4. Specifications: Model 4040 Dual Drive Floppy Disk
STORAGE:
Total capacity
Sequential
Relative
Directory entries
Sectors
per track
Bytes per sector
Tracks
Blocks
IC's:
Controller
6504
6530
6522
Interface
6502
6532 (2)
6332 (2)
Shared
6114 (8)
PHYSICAL:
Material
Dimensions
Height
Width
Depth
ELECTRICAL:
174848 bytes per diskette
168656 bytes per diskette
167132 bytes per diskette
65535 records per file
144 per diskette
17 to 21
256
35
683
microprocessor
I/O, RAM, ROM
I/O, interval timers
microprocessor
I/O, RAM, interval timers
ROM
4x1K RAM
18 gao steel
6.5"
15.0"
14.35"
Power requirements (4040) USA (domestic)
Voltage
120 VAC
Frequency
60 Hertz
Power 50 Watts
Power requirements (4040) (international)
Voltage
100,220, or 240 VAC
Frequency
60 Hertz
Power 50 Watts
MEDIA:
8
Diskettes Standard mini 5 1/4", single sided,
single density

CARE OF THE 2040, 3040, 4040 AND 8050
The disk drive should be placed on aflat surface free of vibration. It is important that dust
particles be kept at aminimum since aparticle buildup will interfere with optimum opera-
tion.
If you should experience ahardware failure contact your Commodore dealer. Any
attempt
to correct the problem yourself could result in voiding the warranty.
CARE OF THE DISKETTES
Handle diskettes with care. Follow these instructions to maintain the quality of the diskette
and
to protect the integrity of the data:
1. Return the diskette to its storage envelope whenever it is removed from the drive.
2. Keep the diskettes away from magnetic fields. Exposure to amagnetic field can distort
the data.
3. Never leave adiskette on top of your computer or disk drive.
4. Do
not write on the plastic jacket with alead pencil or ball-point pen. Use afelt tip pen
or fill out the label before attaching it
to the jacket.
5.
Do not expose diskettes to heat or sunlight.
6. Do not touch or attempt to clean the diskette surface. Abrasions will cause loss of stored
data.
7. Before applying power
to the 2040, 3040, or 4040 open the drive doors and remove
diskettes.
UNPACKING THE DISK DRIVE
Before unpacking the disk drive, inspect the shipping carton for signs of external damage. If
the carton is damaged, be especially careful when inspecting its contents. Carefully remove
all packing material and the contents of the carton. DO NOT discard any packing material
until you have made sure you have located all the contents of the carton! The carton
should contain:
1. Commodore Dual Floppy Disk Drive
2. User Manual, Number 320899
3. One of the following TEST/DEMO diskettes:
a. 2040/3040/4040 TEST/DEMO diskette, PIN 4040037
b. 8050 TEST/DEMO diskette, PIN 8050050
If any items are missing, please contact your Commodore dealer immediately.
9

Chapter 2
PREPARING TO USE
YOUR DISK DRIVE
Before starting to use your disk drive, make sure it is in good working condition. This in-
cludes properly connecting it
to your computer, giving it apower-on and initial checkout
test, and finally the performance test using the appropriate TEST/DEMO diskette.
CONNECTING THE DISK DRIVE TO THE COMPUTER
One of two connector cables are required to interface the floppy to the computer. These
cables can be supplied by your Commodore dealer.
1. PET-to-IEEE cable, PIN 320101
Use this cable if the disk drive is to be the only (or first) IEEE device connected to your
computer.
2. IEEE-to-IEEE cable,
PIN 905080
Use this cable if your disk drive is to be connected ("daisy-chained") to another peri-
pheral device such
as the Commodore Model 2022, or any other suitable interfaced
printer.
NOTE: The disk drive should be the first peripheral attached
to the computer if other de-
vices are
to be "daisy-chained".
Follow these steps
to connect the disk drive to your computer:
STEP 1: Turn power OFF
to the computer.
STEP 2: Place the disk drive in aconvenient location
as close as possible to the computer.
DO NOT connect the disk drive to apower outlet at this time.
STEP
3: Connect the PET-to-IEEE cable between the IEEE-488 interface connector on the
computer and the connector on the disk drive.
If additional IEEE devices are to
be connected, the IEEE-to-IEEE cable(s) must be used.
STEP 4: Connect the disk drive power cable to an
AC outlet. DO NOT turn on power at
this time.
11

12
Floppy Disk
IEEE-la-IEEE
Cable
(PIN 905080)
Prinler
Figure 2 - Floppy Disk Hookup
PERFORMING THE POWER-ON TEST
You are now ready to proceed with the power-on part of the checkout:
STEP 1: Open both disk drive doors. Ensure that no diskettes are present in either drive.
STEP 2: Turn power
ON to the COMPUTER and verify that it is working properly.
STEP 3: Apply power to the disk drive.
All three indicator lights (LEDS) on the front
panel will flash twice. On the 8050, the two drive LEDs will
go out and the center
two-color power/error LED will stay green indicating power ON.
If the drive
lights remain on,
all lights flash continuously, or if the power/error LED is red for
more than five seconds, turn the power OFF.
Wait one minute and try again. If
any light remains lit, or all lights flash continuously, contact your Commodore
dealer immediately.
NOTE:
If the problem persists, try disconnecting the other devices attached to the IEEE
bus. This should assure that aproblem related
to another device does not affect the disk
drive.

INSERTING THE DISKETTE INTO THE 8050
STEP 1: Insert the diskette into the slot designated "Drive 0" and with the write protect
tab oriented
to the left.
STEP 2: Once the diskette
is in the slot, push gently on the diskette until you hear adis-
tinct "clock". The diskette
is now properly positioned in the drive.
STEP
3: Press DOWN firmly on the spring-loaded door of the drive to lower the diskette
into the correct position. It
is important to press firmly on the door in asmooth
motion
to avoid damaging the diskette.
STEP
4: To remove the diskette, press DOWN firmly on the spring-loaded door. This will
release the spring and raise the diskette. When the diskette is level with the open-
ing, press
UP on the door. This will release the diskette and push it out toward the
front
of the drive. The diskette is now free to be removed from the drive.
STEP 5:
DO NOT ATTEMPT TO CLOSE THE DOOR WITHOUT ADISKETTE IN
PLACE. The door is locked open by amechanical interlock mechanism associated
with the diskette ejector that prevents the door from closing if no diskette has
been loaded.
WRITE
PROTECT
NOTCH
WHEN COVERED, DISKETTE
CONTENTS CANNOT
BE ALTERED
I
••
•
I-
eI:
W
en
z
Figure 3 - Position for Diskette Insertion
INSERTING THE DISKETTE INTO THE 2040, 3040 AND 4040
CAUTION: NEVER APPLY POWER TO THE DISK DRIVE IF DISKETTES ARE
PRESENT (LOCKED AND SEATED) IN EITHER DRIVE 0OR DRIVE 1.
STEP 1: Ensure that the power to the disk drive is OFF and DO NOT apply power until
you complete this step. Open
both disk drive doors and make sure that no
diskettes are present in either drive.
STEP 2:
If the preceding conditions have been met, you may apply power to the disk
drive.
13

STEP 3: Insert the diskette into the slot marked "Drive 0" and with the write protect tab
oriented
to the left.
STEP 4: Once the diskette
is in the slot, gently push on it until it is fully seated.
STEP 5: Press
DOWN firmly on the spring-loaded door of the drive until you hear adis-
tinct "click". The diskette
is now locked and seated in drive 0, ready for process-
ing by the computer.
STEP 6: To remove the diskette, insert your index finger under the lip of the spring-loaded
door and gently PULL. This will release the door and permit access
to the disk-
ette. The diskette
is now free to be removed from the drive.
THE 4040 AND 8050 PERFORMANCE TEST
When you have successfully completed the Power-On test, proceed with the Performance
Test. Don't worry if you don't fully understand exactly what
is happening in this test. At
this point, enter the commands just
to get afeel for what you can do with your disk. If UN-
EXPECTED results are obtained during any step of the test, stop and start over again. The
most likely cause of aproblem
is an improperly entered command. This is to be expected
until you become familiar with your disk unit.
All commands are entered via the keyboard and must be followed by acarriage return:
press the RETURN key on your keyboard.
NOTE: Commands must be entered exactly
as shown. DO NOT insert any spaces unless
shown in the example.
If the error indicator lights, you may be able to continue the
example anyway. Re-enter your last command. If the light goes out, your correction was
successful and you may continue.
NOTE FOR BUSINESS KEYBOARD USERS ONLY: You can set your computer for
upper case character entry.
Do this by typing:
POKE 59468,12 and pressing the RETURN key.
14
Although it is not absolutely necessary to give this command, it does permit easy entry.
In addition, the examples in this manual can be duplicated exactly when you use only
upper case.
If this step is omitted the display will be in lower case letters. DO NOT use the
shift key when entering commands. (POKE 59468,14 will return the user
to lower case letters.)
STEP 1: Insert the
DEMO diskette into drive 0 as previously instructed.
STEP 2: Type: LOAD
"*",8 and press RETURN. The computer will load the first file
from the diskette in drive 0and display the following:

STEP 3: Type: RUN and press RETURN. This will cause the DOS Support Program to be
executed. (This program
is not necessary for the disk unit to operate; it just
simplifies the direct mode commands.) Abrief introductory descrption of
DOS
Support is presented in Chapter 3 as it applies to Chapter 3operations. Ade-
tailed description of
DOS Support is presented in Chapter 7.
STEP 4: Insert ablank diskette into drive 1and type:
>N1:DEMO,99
>C1=0
This procedure formats the diskette and copys all files from drive 0
to drive 1,
thus creating abackup of the
DEMO diskette. Remove the DEMO diskette from
drive 0and return it to its protective envelope. Remove the diskette from drive 1
and place it in drive
O. Close the door to drive O.
STEP 5: Type: LOAD "PERFORMANCE TEST",8
The screen will display:
<:,EAF'CHmCT FOF' F'EF'FOFr'1AtJCE E':,T
LORD I ~JCT
PERD'T' •
•
STEP 6: Type: RUN and press RETURN.
The program instructs you to place ablank diskette into each drive. The Per-
formance Test Program executes ashortened version of the test used by Commo-
dore in final inspection of the 4040 or 8050. The purpose of this test
is to ensure
that the unit
is functioning correctly and will take approximately seven minutes
to complete.
NOTE: Do not use diskettes containing any valuable information since the Per-
formance Test Program
will re-format them and any data will be lost. The test
program will label these diskettes "Test Disk
1" and "Test Disk 2". These disk-
ettes are ready for further use when the test program
is completed and the per-
formance test has been satisfied.
STEP 7: Press RETURN, the following will display:
STEP 8: Enter the appropriate response to the question and press RETURN.
The computer
will calculate the maximum number of tracks for the particular
disk drive and begin the performance test. The screen displays:
15