Commodore 1581 User manual

DIAGNOSTIC MANUAL
1581
VERSION 1.5
JANUARY 1988 PN-314854-04
PN-314854-01 — Kit Disk Diagnostic 1581
includes
PN-314854-02 — Diagnostic Progarm Disk 1581 — Version 1.5
PN-314854-03 — Diagnostic Analog Disk 135 TPI
PN-314854-04 — 1581 Diagnostic Manual — Version 1.5
Commodore Business Machines, Inc.
1200 Wilson Drive, West Chester, Pennsylvania 19380 U.S.A.
Commodore makes no expressed or implied war-
ranties with regard to the information contained
herein. The information is made available solely on
an as is basis, and the entire risk as to quality and
accuracy is with the user. Commodore shall not be
liable for any consequential or incidental damages
in connection with the use of the information con-
tained herein. The listing of any available replace-
ment part herein does not constitute in any case
a recommendation, warranty or guaranty as to
quality or suitability of such replacement part.
Reproduction or use without expressed permission,
of editorial or pictorial content, in any matter is
prohibited.
This manual contains copyrighted and proprietary information. No part
of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise, without the prior written permis-
sion of Commodore Electronics Limited.
Copyright © 1988 by Commodore Electronics Limited.
All rights reserved.

DIAGNOSTIC DISKETTE INTRODUCTION
VERSION 1.5
This manual was developed to aid you in the use of the
Diagnostics available for Repair Troubleshooting of the
CBM C128/C128D Consumer Product Line.
The manual is separated into four (4) sections.
SECTION 1: This section contains Diagnostic and Test Programs to assist
in troubleshooting of the CBM 1581 Single Disk Drive
SECTION 2: This section contains Diagnostic and Test Programs to assist
in troubleshooting the C64 Mode, 80 Column Mode and External
RAM Expansion Cartridges of the C128 and C128D Systems.
SECTION 3: This section contains some user friendly Disk Drive Utility
Programs which should help you with day to day operations.
SECTION 4: This section contains some of the most used Basic Commands
of the C128 and C1l28D Systems.
The following listing is the directory of the Version 1.5 Diagnostic
Diskette and a brief explanation of each Diagnostic Test. More detailed
information is contained inside the manual.
Disk
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
PGM
Name
WON
AW
&
WD
FF
-- DIAGNOSTIC V 1.5
"1581 MENU.V1.5" ** 1581 - Diagnostic Test Option Menu
“SYSTEM TEST" ** 1581 - System Test
"SOFT ERROR TEST" ** 1581 - Final MFM Soft Error Test
"LOGIC DIAGNOSTIC" ** 1581 - Logic Diagnostic Test
"ALIGNMENT/REPAIR" ** 1581 - Alignment/Repair Test
"C128 80 COLUMN" ** C128 - 80 Column Mode Test
"C128 C64 MODE" ** C128 - C64 Mode Test
"C128 RAM XPANDER"™ ** C128 - 1700/1750 RAM Expander Test
"128D 80 COLUMN" ** C128D - 80 Column Mode Test
"128D C64 MODE" ** C128D - C64 Mode Test
"128D RAM XPANDER" ** C128D —- 1700/1750 RAM Expander Test
"DISK BACKUP" ** 1581 - Disk Backup Utility
"FILE COPY" ** 1581 - File Copy Utility
"DISK FORMATTER" ** 1581 - Disk Format Utility
"FILE SCRATCHER"” ** 1581 - File Scratch Utility
“FILE RESTORER" ** 1581 - Scratched File Restore Utility
"1581 SYSTEM.BINI1” ** 1581 - System Test - Binary Data
"1581 SYSTEM.BIN2" ** 1581 - System Test - Binary Data
"1581 SYSTEM.BIN3" ** 1581 - System Test - Binary Data
"1581 SOFT.BIN1" ** 1581 - Soft Error Test - Binary Data
"1581 SOFT.BIN2" ** 1581 - Soft Error Test - Binary Data
"1581 SOFT.BIN3" ** 1581 - Soft Error Test - Binary Data
"1581 LOGIC.BIN1" ** 1581 - Logic Diagnostic Test - Binary Data
"1581 LOGIC.BIN2" ** 1581 - Logic Diagnostic Test - Binary Data
"1581 ALIGN.BIN1L" ** 1581 - Alignment/Repair Test - Binary Data
Introduction 1

TABLE OF CONTENTS
VERSION 1.5 DIAGNOSTIC TESTS
+ eee ee eee eee ee oe eee _ ee ee ee ee ae we eee a ae SS OS SS SS SSS SO == - m= +
SECTION ONE
DISK DRIVE DIAGNOSTIC
AND TEST PROGRAMS
$---~---—----- - + + +--+ + + + + + + e+ + +
1581 DIAGNOSTIC MENU eecccccccccceee Page 1
1581 SYSTEM TEST ceoeeeceeeeeeeecee Page 1-1 thru 1-5
1581 SOFT ERROR TEST eoeeeeeeeeeneecece Page 1-6 thru 1-11
1581 LOGIC DIAGNOSTIC eeoeeeeeeeeeeeene Page 1-12 thru 1-13
1581 ALIGNMENT/REPAIR ceoeeeeeteeoeeeeee Page 1-14 thru 1-23
+------------ - - -- - - - - - - - - - - - + - +--+ - - - --+
$-----~~~~~ +--+ +--+ + + + +--+ +
SECTION TWO
COMPUTER DIAGNOSTIC
AND TEST PROGRAMS
$2 ee +
C128/C128D 80 COLUMN TEST eeoeceeeeeeeeeoeee Page 2-1
C128/C128D C64 MODE TEST eeoeoeeeeeeeveeae0e Page 2-2
C128/C128D RAM EXPANSION TEST eccccccccccccee Page 2-3 thru 2-5
$---------~---- ---- - --------~---------------- —
$—-------------- --—— - ~----- +--+ +--+ +
SECTION THREE
DISK DRIVE
UTILITY PROGRAMS
$-------------- - -- - - - - + - =. - - - - - +--+ -- +--+ - -+
1581 DISK BACKUP eeeeveeeevee0eeeee8 Page 3-1
1581 FILE COPY eeeoeeeeveeeeeeece Page 3-2 thru 3-4
1581 DISK FORMATTER eoeveeeeneeeeeeeee Page . 3-5 thru 3-6
1581 FILE SCRATCHER eeeoeoaeeoeoveeveeeee Page 3-7
1581 FILE RESTORER eoeeeeeveeveeeeee Page 3-8
$e me a ee ~ -—--+
fom n en - oe - +
SECTION FOUR
COMMON BASIC
7.0 COMMANDS
ao wn ns a a ae a a ae ee nr ee ee a ee ———— - ----+
Table of Contents 1
+

1581 DIAGNOSTIC MENU
VERSION 1.5
DESIGNED TO LOAD : 1581 DIAGNOSTIC PROGRAMS
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1581 SINGLE DISK DRIVE
40 COLUMN MONITOR OR TV SET
VERSION 1.5 DIAGNOSTIC DISKETTE
The Diagnostic Menu is used to Load Diagnostic Tests
from the Selected Load Drive. Because the Diagnostic
Binary Files for correct operation ....
and Utilities
Tests use
DISK DRIVE TESTS WILL FAIL IF
DOUBLE SIDED/DOUBLE DENSITY TEST DISKETTES ARE NOT USED
1581 DIAGNOSTIC MENU VERSION 1.5
Press (+) - Set Load Device Number
Press (-) - Set Test Device Number
Press (@) - Set Test Computer Type
Press (1) - 1581 System Test
Press (2) - 1581 Soft Error Test
Press (3) - 1581 Logic Diagnostic
Press (4) - 1581 Alignment/Repair
Press (5) - C128/C128D 80 Column Test
Press (6) - C128/C128D C64 Mode Test
Press (7) - C128/C128D RAM Expander Test
Press (0) - Display Utilities Menu
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FH
HF
H
FH
LOAD FROM DEVICE NUMBER >> [8] or [9]
RUN TESTS DEVICE NUMBER >> [8] or [9]
SYSTEM TYPE TO BE TESTED >> 1581
1581 UTILITIES MENU VERSION 1.5
* Press (+) - Set Load Device Number
* Press (-) - Set Test Device Number
* Press (1) - 1581 Disk Backup
2-DRIVES REQUIRED
Press (2) - 1581 File Copy
2-DRIVES REQUIRED
Press (3) - 1581 Disk Formatter
Press (4) - 1581 File Scratcher
Press (5) - 1581 File Restorer
Press (0) - Display Diagnostic Menu
*
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LOAD FROM DEVICE NUMBER >> [8] or [9]
RUN TESTS DEVICE NUMBER >> [8] or [9]
SYSTEM TYPE TO BE TESTED >> 1581
Page l

1581 SYSTEM TEST
VERSION 1.5.1
DESIGNED TO TEST : 1581 SINGLE DISK DRIVE
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1581 SINGLE DISK DRIVE
40 COLUMN MONITOR OR TV SET
FORMATTED (WRITE=PROTECTED) DISKETTE
BLANK TEST DISKETTE
VERSION 1.5 DIAGNOSTIC DISKETTE
SYSTEM TEST OPTION MENU
Press (0) = Select Device Number >> [8] or [9]
Press (1) = Zero Stop Sensor Test
Press (2) = Write Protect Sensor Test
Press (3) - Read/Write Head Bump Test
Press (4) - Read/Write Test
Press (A) - All Above Tests
Press SPACE - Load Diagnostic Menu
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+
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H
F
SYSTEM TEST OPTION ONE -- SELECT DEVICE NUMBER
* This option allows the System Test to be run on a system set to
either Device Number [8] or [9].
* Selected Device Number is Displayed
SYSTEM TEST OPTION TWO -- ZERO STOP SENSOR TEST
* Insert a Formatted Write-Protected Diskette
* Write-Protect Tab Must be OPEN
* Press SPACE - Start Testing
Begins Zero Stop Sensor Test
* Press RETURN = Return to Menu
Displays System Test Main Menu
The Zero Stop Sensor Test checks for proper adjustment of the Zero
Stop Sensor by Looping, (5 Times), through the Sensor to Zero Track
and Reading a Pre-Written Mark on the Diskette.
+ ae Oe OO OOS OOO ® 22 - -
FOR MOST ACCURATE TESTING THE FORMATTED DISKETTE BEING USED SHOULD
BE FORMATTED ON A KNOWN GOOD DRIVE OTHER THAN THE ONE UNDER TEST
+o www woewoeeoeweooere] eeee _—a
FAILURE - DEFECTIVE, UN=-FORMATTED OR UN-WRITE=PROTECTED DISKETTE
MIS-ADJUSTED ZERO STOP SENSOR OR DRIVE ALIGNMENT
DEFECTIVE ZERO STOP SENSOR OR CONTROL LOGIC
* Pass/Fail Status is Displayed
* Press RETURN — Return To Menu
Displays System Test Main Menu
Page 1-1

1581 SYSTEM TEST
VERSION 1.5.1
SYSTEM TEST OPTION THREE - WRITE PROTECT SENSOR TEST
* Insert a Formatted Write=-Protected Diskette
* Write=-Protect Tab Must be OPEN
* Press SPACE = Start Testing
Begins Write-Protect Sensor Test
* Press RETURN - Return to Menu
Displays System Test Main Menu
The Write Protect Sensor Test checks for proper operation on the Write
Protect Sensor by attempting a Format Operation on the Write-Protected
Diskette and Reading the Error Channel.
+
ae
+
FOR
MOST
ACCURATE
TESTING
THE
FORMATTED
DISKETTE
BEING
USED
SHOULD
BE FORMATTED ON A KNOWN GOOD DRIVE OTHER THAN THE ONE UNDER TEST
+ —— - +
FAILURE - DEFECTIVE, UN-FORMATTED OR UN-WRITE-PROTECTED DISKETTE
MIS-ADJUSTED ZERO STOP OR DRIVE ALIGNMENT
DEFECTIVE WRITE=PROTECT SENSOR OR CONTROL LOGIC
* Pass/Fail Status is Displayed
* Press RETURN - Return To Menu
Displays System Test Main Menu
SYSTEM TEST OPTION FOUR - ZERO STOP BUMP TEST
* Insert a Formatted Write-Protected Diskette
* Write-Protect Tab Must be OPEN
* Press SPACE = Start Testing
Begins Zero Stop Bump Test
* Press RETURN = Return to Menu
Displays System Test Main Menu
The Zero Stop Bump Test checks for proper adjustment of the Zero Track
Sensor, in Slow Mode, by looping the Read/Write Head, (5 Times), through
the Zero Stop Sensor and Reading a Pre=Written Mark on the Diskette.
+- =-+
FOR MOST ACCURATE TESTING THE FORMATTED DISKETTE BEING USED SHOULD
BE FORMATTED ON A KNOWN GOOD DRIVE OTHER THAN THE ONE UNDER TEST
+m eeee oaeee +
FAILURE - DEFECTIVE, UN-FORMATTED OR UN-WRITE-PROTECTED DISKETTE
MIS-ADJUSTED ZERO STOP OR DRIVE ALIGNMENT
DEFECTIVE STEPPER MOTOR OR CONTROL LOGIC
* Pass/Fail Status is Displayed
»
* Press RETURN = Return To Menu
Displays System Test Main Menu
Page l=-2

1581 SYSTEM TEST
VERSION 1.5.1
SYSTEM TEST OPTION FIVE = READ/WRITE TESTS
* Insert a Blank Test Diskette
* Write-Protect Tab Must be CLOSED
* Press (F) -— Test Disk is Formatted
* Press (U) - Test Disk is UnFormatted
If the (U)nformatted Option is selected .... (Recommended)
* The Format Operation of the drive is checked by executing a GCR Format
to all Tracks, (Upper and Lower), with an ID written to all sectors.
* The GCR Read/Write Operations are tested by ....
* Opening a Write File = Writing Data to the File - Closing the File
* Opening a Read File = Reading and Verifying Data = Closing the File
* Scratching the File
FAILURE - DEFECTIVE TEST DISKETTE
MIS-ADJUSTED ZERO STOP OR DRIVE ALIGNMENT
DEFECTIVE DRIVE ASSEMBLY
DEFECTIVE READ/WRITE CONTROL LOGIC
* The GCR Slow Mode is checked by ....
* Writing Data to Tracks 5, 15, 75, 79
* Reading and Verifying Data from Tracks 79, 75, 15, 5
* The GCR Fast Mode is checked by ....
* Writing Data to Tracks 5, 10, 76, 79
* Reading and Verifying Data from Tracks 79, 76, 10, 5
FAILURE - TEST DISKETTE DEFECTIVE OR NOT DOUBLE-SIDED/DOUBLE DENSITY
MIS-ADJUSTED ZERO STOP SENSOR OR ALIGNMENT
DEFECTIVE DRIVE ASSEMBLY
DEFECTIVE READ/WRITE CONTROL LOGIC
* The MFM Burst Format Operation is checked by Formatting ....
TRACK BYTES/SECTOR
01 256
02 512
40 1024
41 256
76 512
79 1024
Page 1-3

1581 SYSTEM TEST
VERSION 1.5.1
* The MFM Burst Read/Write Operations are checked by ....
* Writing, Reading and Comparing Data on ....
SIDE TRACK BYTES/SECTOR SIDE TRACK BYTES/SECTOR
0 01 256 1 81 256
0 02 512 1 82 512
0 40 1024 1 120 1024
0 41 256 1 121 256
0 76 512 1 156 512
0 79 1024 1 159 1024
FAILURE - TEST DISKETTE DEFECTIVE OR NOT DOUBLE-SIDED/DOUBLE DENSITY
DEFECTIVE DRIVE ASSEMBLY
DEFECTIVE READ/WRITE CONTROL LOGIC
COMPATIBILITY TEST
COMPATIBILITY TEST OPTION MENU
* Press (8) = Second Drive Set to Device Number [8]
* Press (9) = Second Drive Set to Device Number [9]
* Press (S) = Skip Compatibility Test
COMPATIBILITY TEST OPTION ONE = SECOND DRIVE = DEVICE [8]
COMPATIBILITY TEST OPTION TWO = SECOND DRIVE = DEVICE [9]
These options allow the Data Written during the Read/Write Test to be
verified on a second drive which may be set to either Device Number [8]
or Device Number [9].
* This helps determine if Data Written on the drive
under test can be read by other drives.
* The GCR 1581 Slow Mode Compatibility is checked by ....
* Reading and Verifying GCR Data, written during the Read/Write Test,
from Tracks 5, 15, 75, 79
* The GCR 1581 Fast Mode Compatibility is checked by ....
* Reading and Verifying GCR Data, written during the Read/Write Test,
from Tracks 5, 10, 76, 79
Page 1-4

1581 SYSTEM TEST
VERSION 1.5.1 .
* The Burst MFM Mode Compatibility is checked by ....
* Reading and Verifying MFM Data, written during the
Read/Write Test, from ....
SIDE TRACK BYTES/SECTOR SIDE TRACK BYTES/SECTOR
0 01 256 1 81 256
0 02 512 1 82 512
0 40 1024 1 120 1024
0 41 256 1 121 256
0 76 512 1 156 512
0 79 1024 1 159 1024
FAILURE - MIS-ADJUSTED ZERO STOP OR ALIGNMENT ON ONE OF THE DRIVES
DEFECTIVE DRIVE ASSEMBLY ON ONE OF THE DRIVES
COMPATIBILITY TEST OPTION THREE - SKIP COMPATIBILITY TEST
This option allows the Compatibility Section of the Read/Write Test
to be skipped if a second drive is not available.
SYSTEM TEST RESULTS
* System Test - Pass/Fail Status
* Compatibility - Pass/Fail/Skipped Status
* Press RETURN - Return to Menu
Displays System Test Main Menu
SYSTEM TEST OPTION SIX = ALL ABOVE TESTS
This option executes options (2-5) with a countdown between tests.
SYSTEM TEST OPTION SEVEN - LOAD DIAGNOSTIC MENU
* Insert the Version 1.5 Diagnostic Diskette
* Press (8) = Load the Diagnostic Menu from Device Number [8]
* Press (9) = Load the Diagnostic Menu from Device Number [9]
*
Press RETURN = Return to Menu
Displays System Test Main Menu
Page 1-5

1581 SOFT ERROR TEST
VERSION 1.5.1
DESIGNED TO TEST : 1581 SINGLE DISK DRIVE
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1581 SINGLE DISK DRIVE
COMMODORE OR COMPATIBLE PRINTER (OPTIONAL)
40 COLUMN MONITOR OR TV SET
BLANK TEST DISKETTE
VERSION 1.5 DIAGNOSTIC DISKETTE
The Soft Error Test does an Extended Read/Write Performance Test on
the Disk Drive under test.
THE SOFT ERROR TEST SHOULD BE RUN ON ALL UNITS IN FOR REPAIR
+—
+
INSERT BLANK TEST DISKETTE
BEFORE SELECTING ANY OPTIONS
SOFT ERROR TEST OPTION MENU
Press RETURN —- Start Test >> 50 Pass
Press (C) - Select Device Number >> [8] or [9]
Press (X) - Preliminary Test >> 2 Pass
Press (M) - Modified Test
Press (0) - Read Test Results
Press SPACE - Load Diagnostic Menu
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&
NOTE : IF A PRINTER IS CONNECTED
TEST RESULTS WILL BE PRINTED
RATHER THAN DISPLAYED
SOFT ERROR TEST OPTION ONE ~- START TEST (50 PASS)
This option is used for Final Soft Error Testing. At the end of 50 Passes,
the test will terminate and the drive will be reset. All Test Results will
be stored on the Test Diskette and read at test end using Soft Error Test
Option Five (Read Test Results).
* To save Test Time, this option should be run only after the unit has
passed the 2 Pass Preliminary Test (Soft Error Test Option Three)
WHEN DOWNLOADING IS COMPLETE AND THE SOFT ERROR TEST OPTION MENU
IS DISPLAYED, THE TEST WILL RUN INTERNAL TO THE DRIVE AND THE
C128/C128D NEED NO LONGER BE CONNECTED UNTIL THE TEST IS
COMPLETE AND THE TEST RESULTS ARE READ
+ ~
SOFT ERROR TEST OPTION TWO ~ SELECT DEVICE NUMBER
»
This option allows the Soft Error Test to be run on a drive which is
set to either Device Number [8] or [9]
Page 1-6

1581 SOFT ERROR TEST
VERSION 1.5.1
SOFT ERROR TEST OPTION THREE ~- PRELIMINARY TEST
PRELIMINARY SOFT ERROR TEST OPTION MENU
Press RETURN —- Start Test >> 2 Pass
Press (A) - Alter Passes >> 2 Pass
Press (0) - Read Test Results
Press (X) - Return to Menu
Displays Soft Error Test Main Menu
+e
+
PRELIMINARY SOFT ERROR TEST OPTION ONE - START TEST 2 PASS
This option is used for Preliminary Soft Error Testing. At the end of the
designated number of passes, displayed next to Alter Pass Option, the test
will terminate and the drive will reset. Test Results are stored on the
Test Diskette and read at test end using Option Three. (Read Test Results)
* If the drive passes this Preliminary Test, the 50 Pass Soft Error Test
(Soft Error Test Option One) should be run.
taewmwewow
WHEN DOWNLOADING IS COMPLETE AND THE SOFT ERROR TEST OPTION MENU
IS DISPLAYED, THE TEST WILL RUN INTERNAL TO THE DRIVE AND THE
C128/C128D NEED NO LONGER BE CONNECTED UNTIL THE TEST IS
COMPLETE AND THE TEST RESULTS ARE READ.
+ -
PRELIMINARY SOFT ERROR TEST OPTION TWO - ALTER PASSES
This option is used to set the Number of Passes the Soft Error Test is
to execute.
* Current Number of Passes is displayed next to option
PRELIMINARY SOFT ERROR TEST OPTION THREE - READ TEST RESULTS
This option is used to read and display Soft Error Test Results once the
designated number of passes are complete,
* Complete Error Reporting as well as Pass/Fail Status is displayed.
* Refer to Soft Error Test Result Summary -- Pages 1-9 thru l-11
SOFT ERROR TEST OPTION FOUR ~ MODIFIED TESTS
* Press (C) - Create Custom Error Test
* Press (B) - Blink LED at Test End
* Press RETURN - Return to Menu
Displays Soft Error Test Main Menu
Page l~-7

1581 SOFT ERROR TEST
VERSION 1.5.1
MODIFIED SOFT ERROR TEST OPTION MENU - CREATE CUSTOM ERROR TESTS
This option allows Special Parameters to be selected to create a
Custom Soft Error Test. The Parameter Options are as follows ....
l. NEW TEST OR CONTINUATION
When (N)ew is selected, the Error Log is cleared at the start of
the test. When (C)ontinuous is selected, the existing Error Log
is used as the starting condition and the test will continue from
this point.
* If the Test Diskette has not previously been used in the
Soft Error Test, the (N)ew Option must be selected.
SPECIFY PASS TYPE
The test may be set to (R)ead Only, (W)rite Only or Read With a
Rewrite of Data per the selected Read to Write Pass Ratio.
* This Ratio Represents The Number Of Read Passes Per Each
Write Pass. Maximum Read To Write Ration = 127
ENTER NUMBER OF PASSES DESIRED
This represents the Number of Passes the Soft Error Test will run.
* If the Test is to Conclude Itself, a Maximum of 500 Passes may
be entered. If (0) is Entered, the Test Will Run Forever.
WANT FORMATTING (Y/N)
If (Y)es is selected, the diskette will be formatted by the test.
If (N)o is selected, the test will start without formatting.
* If the (N)ew Option was Previously Selected, (Y)es Must be
Selected here.
TRACK SEQUENCE TO BE
This Option allows selection of the Track Testing Sequence.
* If (A)lternating is Selected, the Track Testing Sequence will
Alternate between Sequential and Random after each pass.
* If (S)equential is Selected, the Tracks are Tested in Sequential
Order. (Tracks 1 thru 160)
* If (R)andom is Selected, the Tracks are Tested in a Random
Fashion, Allowing Complete Exercise of the Stepper Motor.
RESET OR BLINK AT TEST END
This option allows the Drive LED Status to be set at Test End and
starts execution of the Soft Error Test utilizing selected options
* If (R)eset is Selected, the Drive Will be Reset at Test End
* After Reset, all Disk Activity, including the Flashing
Activity LED will cease.
* If (B)link is Selected, the Drive LED will Blink in a
Series of (1) Flash Codes at Test End
* If (B) link is Selected, the Drive Must be Manually Reset
before Test Results can be Read.
* Turn Drive Power OFF and ON
Page 1-8

1581 SOFT ERROR TEST
VERSION 1.5.1
MODIFIED SOFT ERROR TEST OPTION TWO - BLINK/RESET LED AT TEST END
This option allows setting of the Drive LED Status at Test End
* Press (B) - Blink LED at Test End
* Press (R) - Reset LED at Test End
SOFT ERROR TEST OPTION FIVE - READ TEST RESULTS
This option reads and displays the results of the Soft Error Test. These
results are stored on the Test Diskette and updated at the end of each
Completed Pass. Complete Error Reporting along with Pass/Fail Status are
displayed as follows ....
+ +
IF A PRINTER IS CONNECTED, THE TEST RESULTS WILL BE PRINTED TO
HARD COPY -- THIS PRINTOUT SHOULD BE RETURNED TO THE CUSTOMER
WITH THE UNIT TO SHOW THE RESULTS OF FINAL TESTING
+ a es ees
SOFT ERROR TEST RESULT SUMMARY
1. NUMBER OF PASSES
The Total Number of Passes run.
* All Tracks on the Diskette are Tested Each Pass
* Minimum Number of Passes = One Complete Pass
2. COUNTABLE ERRORS
The Total Number of encountered errors that required more than
one (1) retry to recover.
* Countable Errors = Total Errors minus Recovered Errors
* Maximum Countable Errors = Total Passes divided by a Set Value
3. TOTAL ERRORS
The Total Number of Errors encountered during the test.
* This Count is Incriminated Only Once for each error regardless
of the Number Of Retries Necessary to Recover the Error.
* If this Count Reaches (1024), the Test Will Terminate
* Maximum Errors = Total Passes divided by a Set Value
4. PASS/ERROR RATIO
The Number of Passes versus the Number of Encountered Errors
* Pass/Error Ratio = Number of Passes divided by Countable Errors
* Minimum Pass/Error Ratio = Number of Passes divided by a Set Value
5. FIRST PASS RETRIES
The Total Number of retries that were successful
* This Value is a Measure of Diskette Quality as it will show how
many Persistent Errors were Encountered
* If this Value Reaches Five (5), a Defective Diskette is indicated
and the test will terminate
* First Pass Retries are Determined for the First Pass Only
First Pass Retries = Number of Retries minus First Retries
Page 1-9

1581 SOFT ERROR TEST
VERSION 1.5.1
6. TRACK, ERRORS, FIRST PASS RETRIES
This listing breaks down all Encountered Errors on a Per Track Basis.
* A Defective Diskette is indicated by Errors Concentrated on the
Same Track or Adjacent Tracks
* Displayed Only if at Least One Error was encountered
7. ERROR TYPE, OPERATION, ERRORS
This listing breaks down Total Errors according to Type of Error,
Operation Being Performed when the error occurred and Number of
Encountered Errors per type as follows ....
* HEADER BLOCK NOT FOUND
* The Header Block Identifier could not be found
* NO SYNC CHARACTER
* A Sync Mark, (10 or More Consecutive 1 Bits), on a given track could
not be found within a predetermined amount of time and a Time Out
has occurred
* DATA BLOCK NOT FOUND
* A Decoded 8 Bit Byte read from the diskette did not compare to a
Present Block Identifier
* DATA BLOCK CHECKSUM ERROR
* The Calculated Checksum of a 256 Byte Data Block did not match the
Actual Checksum Read from the diskette
* VERIFY ERROR AFTER WRITE
* The Data just Written to a sector of the diskette when Read Back,
does not verify with Data Stored in Disk Memory
* WRITE PROTECT ERROR
* A Write Operation to the diskette cannot be performed due to ....
* Write-Protect Tab Open on the Diskette
* Defective Write-Protect Sensor
* HEADER CHECKSUM ERROR
* The Header Checksum, Stored in Disk Memory, when EORed with an
Independent Checksum does not compare
* ID MISMATCH ERROR
* The Disk IDs, Read from the Header Block, did not compare with
the Disk IDs Stored in Disk Memory.
* Data Block Checksum Errors are normally caused by Random Electrical
Noise and will usually Recover in One (1) Retry
OPERATION
* READ - Data is Read and Verified against Expected Data
* WRITE - Data is Written, Stored in Disk Memory, Read Back and
Compared to Disk Memory Data
* SEEK - The Read/Write Head is moved to a Predetermined Track
Page 1-10

8.
10.
1581 SOFT ERROR TEST
VERSION 1.5.1
ERROR TIME
The Total Number of Errors per each 10 Passes
* An Increasing Error Rate indicates a Bad Diskette or a
Gradually Failing System
RECOVERY COUNT
The Total Number of Retries Required to Recover Encountered Errors
* A Persistent Error, one Requiring More Than One (1) Retry, or
More Than Twenty (20) Errors Recovered in the First Retry is
normally a sign of a Defective Drive Mechanism Or Marginal
Components
* Maximum Retries = Ten (10) before an error is considered a
Hard Error in which case the unit will fail the Soft Error Test
PASS/FAIL
The Bottom Line whether or not the unit has Passed the Soft Error
Test for the Allotted Number of Passes and the Final Status of
Test Results
SOFT ERROR TEST OPTION SIX ~- LOAD DIAGNOSTIC MENU
+t
+
& Insert the Version 1.5 Diagnostic Diskette
Press (8) - Load the Diagnostic Menu from Device Number [8]
Press (9) - Load the Diagnostic Menu from Device Number [9]
Press RETURN ~ Return to Menu
Displays Soft Error Test Main Menu
Page l-ll

1581 LOGIC DIAGNOSTIC
VERSION 1.5.1
DESIGNED TO TEST : 1581 SINGLE DISK DRIVE
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1581 SINGLE DISK DRIVE
40 COLUMN MONITOR OR TV SET
VERSION 1.5 DIAGNOSTIC DISKETTE
The Logic Diagnostic is designed to test the Main Control Chips of
the System Under Test utilizing a Flash Code on the Activity LED.
LOGIC DIAGNOSTIC OPTION MENU
* Press (0) - Select Device Number >> [8] or [9]
* Press RETURN - Start Diagnostic Test
* Press SPACE - Load Diagnostic Menu
LOGIC DIAGNOSTIC OPTION ONE - SET DEVICE NUMBER UNDER TEST
This option allows the Logic Diagnostic to be run on a System
set to either Device Number [8] or [9]
LOGIC DIAGNOSTIC OPTION TWO - START DIAGNOSTIC TEST
ROM FAILURES WILL OCCUR IF OUT-DATED ROMS ARE INSTALLED
VALID ROMS -- 1581 - PART NUMBER 312558-02
This option Downloads the Diagnostic Code to the Test System.
* If the Download is successful the Activity LED should be
flashing at a consistent rate.
* press (Y)es or (N)o
* If the Activity LED is not flashing at a constant rate after the
Download is complete, a Download Failure has occurred and (N)o
should be selected.
* If a Download Failure occurs the drive must be Reset before the
Download may again be attempted. Reset the drive by ....
* 1581 - Turn the Power OFF then ON
* Press RETURN - Retry Download
* A Total of Three (3) Attempts may be made before the System is
Determined to Have a Hard Failure
* Press RETURN - Return to Menu
Displays Logic Diagnostic Main Menu
»
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1581 LOGIC DIAGNOSTIC
VERSION 1.5.1
* If (y)es is selected, the Activity LED Flash Sequence is interpreted
using the Error Flash Code Chart
pene --- = ee ee es ss + + + + + +
ERROR FLASH CODE CHART
+------------------------- +----------------------- $ew—————— = +
FLASH 1581 IC 1581 IC
CODES FAILURE LOCATION
+-------------~----------- +-------~---------------- +-------------- +--+ +
1 FLASH SYSTEM OK NO FAILURE
2 FLASHES DOS ROM U2
3 FLASHES DOS RAM U3
4 FLASHES 8520 CIA Us
5 FLASHES WD1770/1772 FDC U4
6 FLASHES ILLEGAL
$—------------------------- +----------------------- 5 +
$---------~ +++ + + + + + + + +
ONCE A SUCCESSFUL DOWNLOAD IS COMPLETE THE LOGIC DIAGNOSTIC WILL
OPERATE COMPLETELY INTERNAL TO THE DRIVE AND THE C128/C128D NEED
NO LONGER BE CONNECTED
* Once the Logic Diagnostic Code has been Downloaded, the Drive Must
be Reset before any Disk Access can be accomplished
* Turn Drive Power OFF and ON
* Press RETURN - Return To Menu
Displays Logic Diagnostic Main Menu
LOGIC DIAGNOSTIC OPTION THREE - LOAD DIAGNOSTIC MENU
* Insert Version 1.5 Diagnostic Diskette
* Press (8) - Load Diagnostic Menu from Device Number [8]
* Press (9) - Load Diagnostic Menu from Device Number [9]
*
Press RETURN -Return To Menu
Displays Logic Diagnostic Main Menu
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1581 ALIGNMENT/REPAIR TEST
VERSION 1.5.1
DESIGNED TO TEST : 1581 SINGLE DISK DRIVE
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1581 SINGLE DISK DRIVE
DUAL TRACE SCOPE
VOLT METER (OPTIONAL)
40 COLUMN MONITOR OR TV SET
135 TPI ALIGNMENT DISKETTE (P/N 314854-03)
VERSION 1.5 DIAGNOSTIC DISKETTE
ALIGNMENT REPAIR TEST OPTION MENU
Press (0) - Select Device Number >> [8] or [9]
Press (1) - Drive Alignment
Press (2) - Zero Track Test/Adjust
Press (3) - Stepper Motor Slew
Press (4) - Drive Motor Logic
Press (5) - Side Select Logic
Press (6) - Load Diagnostic Menu
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+
Oe
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ALIGNMENT REPAIR TEST OPTION ONE - SELECT DEVICE NUMBER
This option allows the Alignment/Repair Test to be run on a System
set to either Device Number [8] or [9]
ALIGNMENT REPAIR TEST OPTION TWO - DRIVE ALIGNMENT
* Press (S) - Display Scope Settings
* Press (D) - Dis-Assembly and Setup
* Press (A) - Begin Drive Alignment
* Press RETURN - Return to Menu
Displays Alignment/Repair Test Main Menu
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1581 ALIGNMENT/REPAIR TEST
VERSION 1.5.1
1. Set Both Channels To AC Scale
2. Set Both Channels To 50 MV/DIV
3. Invert Channel 2
4. Differentially Add Both Channels
5. Set Sweep To 20 MS/DIV
6. Set Trigger To Auto Mode
7. Remove any Diskette Installed in the Drive
8. Make Sure Drive Power Is OFF
* Press SPACE - Dis-Assembly & Setup
* Press RETURN - Return To Menu
Displays Alignment/Repair Test Main Menu
1. DisConnect Power Cable and Serial Cable
2. Remove the Three (3) Screws from the Bottom Case and Remove
the Top Case from the unit
3. Remove the Drive FacePlate and Set it Beside the Unit
4. Remove the Four (4) Drive Mounting Screws
5. Remove the Two (2) Shield Screws and Remove the Drive Shield
6. Remove the Drive Assembly and Set it on its Side
7. * Connect Scope Probes As Follows ....
famenmewa nnn nee nnn $—-—----- + ee +
l Probe 1 -- Pin 1 -= Test Point TPl | Probe 2 -- Pin 3 -- Test Point TPl |
ewww ewe eee eee eee eee nen nnn en $—--—- et
8. Connect Power Cable and Serial Cable
9. Turn Drive Power ON
10. Insert 135 TPI Alignment Diskette
Commodore Part Number - 314854-03
* Press SPACE - Begin Radial Alignment
* Press RETURN - Return to Menu
Displays Alignment/Repair Main Menu
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