Commodore 1571 User manual

DIAGNOSTIC MANUAL
1571/C128D
VERSION 1.2
JANUARY 1988 PN-314855-03

DIAGNOSTIC MANUAL
1571/C128D
VERSION 1.2
JANUARY 1988 PN-314855-03
PN-314855-01 — Kit Disk Diagnostic 1571 C128D
includes
PN-314855-02 — Diagnostic Disk 1571 C128D — Version 1.2
PN-314855-03 — Diagnostic Manual 1571 C128D — Version 1.2
PN-970016-01 — 48 TPI Analog Align Disk
Commo ore 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 1.2
This manual was de eloped to aid you in the use of the
Diagnostics a ailable 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 1571 Single Disk Dri e and
the C128D Internal Dri e.
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 Dri e 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 C128D Systems.
The following listing is the directory of the Version 1.2 Diagnostic
Diskette and a brief explanation of each Diagnostic Test. More detailed
information is contained inside the manual.
Disk Name — DIAGNOSTIC V 1.2
PGM 1—"SYSTEM.CONFIG" * * 1571/C128D -Configuration Setup Options
PGM 2—"1571 MENU.C128" ★ * 1571/C128 -Diagnostic Test Option Menu
PGM 3—"1571 MENU.128D" * * 1571/C128D -Diagnostic Test Option Menu
PGM 4—"SYSTEM TEST" * * 1571/C128D -System Test
PGM 5—"GCR SOFT ERROR" * * 1571/C128D -Final GCR Soft Error Test
PGM 6—"MFM SOFT ERROR" * * 1571/C128D -Final MFM Soft Error Test
PGM 7—"LOGIC DIAGNOSTIC" * * 1571/C128D -Logic Diagnostic Test
PGM 8—"ALIGNMENT/REPAIR" * * 1571/C128D -Alignment/Repair Test
PGM 9—"C128 80 COLUMN" * * C128 -80 Column Mode Test
PGM 10 —"C128 C64 MODE" * * C128 —C64 Mode Test
PGM 11 —"C128 RAM XPANDER" * * C128 -1700/1750 RAM Expander Test
PGM 12 —"128D 80 COLUMN" * * C128D —80 Column Mode Test
PGM 13 —"128D C64 MODE" * * C128D —C64 Mode Test
PGM 14 —"128D RAM XPANDER" ** C128D -1700/1750 RAM Expander Test
PGM 15 — "FILE COPY 1" ** 1571/C128D -File Copy Utility
PGM 16 —"FILE COPY 2" ** 1571/C128D -File Copy Utility
PGM 17 —"DISK FORMATTER" ** 1571/C128D -Disk Format Utility
PGM 18 —"FILE SCRATCHER" ★ * 1571/C128D -File Scratch Utility
PGM 19 —"FILE RESTORER" ** 1571/C128D -Scratched File Restore Utility
Introduction 1

DIAGNOSTIC DISKETTE INTRODUCTION
VERSION 1.2
PGM 20 —"1571 SYSTEM.BINI" ** 1571 -System Test -Binary Data
PGM 21 —"1571 SYSTEM.BIN2" ** 1571 -System Test -Binary Data
PGM 22 —"1571 SYSTEM.BIN3" ** 1571 -System Test -Binary Data
PGM 23 —"1571 GCR.BINl" ** 1571 -GCR Soft Error Test -Binary Data
PGM 24 — "1571 GCR.BIN2" ** 1571 -GCR Soft Error Test -Binary Data
PGM 25 —"1571 GCR.BIN3" ** 1571 -GCR Soft Error Test -Binary Data
PGM 26 —"1571 MFM.BIN1" *★1571 —MFM Soft Error Test -Binary Data
PGM 27 —"1571 MFM.BIN2" ** 1571 —MFM Soft Error Test -Binary Data
PGM 28 —"1571 MFM.BIN3" ★ * 1571 -MFM Soft Error Test -Binary Data
PGM 29 —"1571 MFM.BIN4" ** 1571 —MFM Soft Error Test -Binary Data
PGM 30 —"1571 LOGIC.BIN1" ** 1571 -Logic Diagnostic Test -Binary Data
PGM 31 —"1571 LOGIC.BIN2" ★ ★1571 -Logic Diagnostic Test -Binary Data
PGM 32 —"1571 ALIGN.BIN1" ** 1571 -Alignment/Repair Test -Binary Data
PGM 33 —"1571 ALIGN.BIN2" ** 1571 -Alignment/Repair Test -Binary Data
PGM 34 — "128D SYSTEM.BINI" ** C128D -System Test -Binary Data
PGM 35 —"128D SYSTEM.BIN2" ** C128D -System Test -Binary Data
PGM 36 —"128D SYSTEM.BIN3" ** C128D -System Test -Binary Data
PGM 37 —"128D GCR.BINl" ** C128D -GCR Soft Error Test -Binary Data
PGM 38 —"128D GCR.BIN2" ** C128D -GCR Soft Error Test -Binary Data
PGM 39 —"128D GCR.BIN3" ** C128D -GCR Soft Error Test -Binary Data
PGM 40 —"128D MFM.BINl" ** C128D -MFM Soft Error Test -Binary Data
PGM 41 —"128D MFM.BIN2" ** C128D -MFM Soft Error Test -Binary Data
PGM 42 —"128D MFM.BIN3" ** C128D —MFM Soft Error Test -Binary Data
PGM 43 —"128D MFM.BIN4" ** C128D -MFM Soft Error Test -Binary Data
PGM 44 —"128D LOGIC.BIN1" ** C128D -Logic Diagnostic Test -Binary Data
PGM 45 —"128D LOGIC.BIN2" ** C128D -Logic Diagnostic Test -Binary Data
PGM 46 —"128D ALIGN.BIN1" ** C128D -Alignment/Repair Test -Binary Data
PGM 47 —"128D ALIGN.BIN2" ** C128D -Alignment/Repair Test -Binary Data
PGM 48 —"FILE COPY.BINI" ** 1571/C128D File Copy 2 -Binary Data
Introduction 2

TABLE OF CONTENTS
VERSION 1.2 DIAGNOSTIC TESTS
SECTION ONE
DISK DRIVE DIAGNOSTIC
AND TEST PROGRAMS
SYSTEM CONFIGURATION PROGRAM
.... .
.......... Page i
1571/C128D DIAGNOSTIC MENU
.... .
. ......... Page 2
1571/C128D SYSTEM TEST
.... .
1-1 thru 1-5
1571/C128D SOFT ERROR TEST .... - 1-6 thru 1-11
1571/C128D LOGIC DIAGNOSTIC .... .
.......... Paae 1-12 thru 1-13
1571/C128D ALIGNMENT/REPAIR
.... ,1-14 thru 1-34
+ -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------H
SECTION TWO
COMPUTER DIAGNOSTIC
AND TEST PROGRAMS
+------------------------------------------------------------------------------ +
C128/C128D 80 COLUMN TEST
C128/C128D C64 MODE TEST
C128/C128D RAM EXPANSION TEST
Page 2-1
Page 2-2
Page 2-3 thru 2-5
+
------------------------------------------------------------------------------ +
+ ------------------------------------------------------------------------------ H
SECTION THREE
DISK DRIVE
UTILITY PROGRAMS
1571/C128D FILE COPY 1 . . . . 3-1 thru 3-3
1571/C128D FILE COPY 2 .... 3-4 thru 3-5
1571/C128D DISK FORMATTER ... . 3-6 thru 3-7
1571/C128D FILE SCRATCHER . . . . 3-8
1571/C128D FILE RESTORER . . . . 3-9
SECTION FOUR
COMMON BASIC
7.0 COMMANDS
+---------------------------------------------------------------------------------------------------------------------------------------H
| C128/C128D BASIC COMMANDS
..............
+----------------------------------------------------- Page 4-1 thru 4-4 |
Table of Contents 1

SYSTEM CONFIGURATION SETUP
VERSION 1.2
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1571 SINGLE DISK DRIVE (C128 ONLY)
40 COLUMN MONITOR OR TV SET
VERSION 1.2 DIAGNOSTIC DISKETTE
The System Configuration Setup Program is used to set up all
options a ailable for complete system testing.
The System Configuration Setup Program can be loaded Two (2) Ways ....
1. If the Version 1.2 Diagnostic Diskette is in De ice Number [8]
* Hold the (SHIFT KEY) Down and Press the (RUN STOP) Key
* Type DLOAD "SYSTEM.CONFIG" (Press RETURN)
When the (READY) Prompt Displays .. Type RUN (Press RETURN)
2. If the Version 1.2 Diagnostic Diskette is in De ice Number [9]
* Type DLOAD "SYSTEM.CONFIG", U9 (Press RETURN)
When the (READY) Prompt Displays .. Type RUN (Press RETURN)
DESIGNED TO SET : SYSTEM TEST CONFIGURATION
CONFIGURATION SETUP DEFAULT OPTIONS
* Load From De ice Number [8]
* Run Tests De ice Number [8]
* System Type To Be Tested 1571
These settings may be changed utilizing the following options ....
* Press (0) - Set Load De ice Number
* This option is useful if you wish to test a C128D and the Internal
Dri e will not load. Tests may then be loaded from an External 1571
* Press (1) - Set Test De ice Number
* This option is useful if the Dri e Under Test is set to De ice [9].
Test may then be run on this dri e without changing the De ice Number.
* Press (2) - Set Test System Type
* This option is used to set the System Type to be tested.
* This option is ery important as it determines which Diagnostic
Menu, (C128 or C128D), is loaded.
As options are selected they will be displayed on the screen
When the Test Configuration is correct ....
Press RETURN - Load System Menu
* Loads the Diagnostic Menu for the Selected System
Page 1

1571/C128D DIAGNOSTIC MENU
VERSION 1.2
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER (SELECTED)
1571 SINGLE DISK DRIVE (C128 ONLY)
40 COLUMN MONITOR OR TV SET
VERSION 1.2 DIAGNOSTIC DISKETTE
The Diagnostic Menus are used to Load Diagnostic Tests or Utilities
from the Selected Load Dri e. Because the Diagnostic Tests use
Binary Files for correct operation ....
DESIGNED TO LOAD : 1571 OR C128D DIAGNOSTIC PROGRAMS
+------------------------------------------------------------------------------------------------------------------- +
| ALL TESTS MUST BE LOADED FROM THESE MENUS |
■f----------------------------------------------------------------------------------------------------------------------------------------—
---------- — -----------------------------------------------^
DISK DRIVE TESTS WILL FAIL IF
DOUBLE SIDED/DOUBLE DENSITY TEST DISKETTES ARE NOT USED
+------------------------------------------------------------------------------ +
DURING 1571 TESTING - A MESSAGE WILL BE DISPLAYED IF THE LATEST ROM
PART NUMBER 310654-05 IS NOT INSTALLED IN THE SYSTEM UNDER TEST
THIS IS JUST A USER NOTE AND WILL NOT STOP THE TEST FROM EXECUTING
+
------------------------------------- -----------------------------------------+
1571/C128D
*Press (-)
*Press ( + )
★Press (1)
★Press (2)
★Press (3)
★Press (4)
*Press (5)
★Press (6)
*Press (7)
*Press (8)
*Press (0)
DIAGNOSTIC MENU VERSION 1.2
- Set De ice # Under Test
- Load C128D/1571 Diagnostic Menu
- 1571/C128D System Test
- 1571/C128D GCR Soft Error
- 1571/C128D MFM Soft Error
- 1571/C128D Logic Diagnostic
- 1571/C128D Alignment/Repair
- C128/C128D 80 Column Test
- C128/C128D C64 Mode Test
- C128/C128D RAM Expander Test
- Display Utilities Menu
SYSTEM UNDER TEST = 1571 OR C128D
DEVICE # UNDER TEST = [8] or [9]
1571/C128D UTILITIES MENU VERSION 1.2
*Press (-)
★Press ( + )
*Press (1)
*Press (2)
★Press (3)
★Press (4)
*Press (5)
*Press (0)
Set De ice # Under Test
Load C128/1571 Diagnostic Menu
1571/C128D File Copy 1
2-DRIVES REQUIRED
1571/C128D File Copy 2
2-DRIVES REQUIRED
1571/C128D Disk Formatter
1571/C128D File Scratcher
1571/C128D File Unscratcher
Display Diagnostic Menu
SYSTEM UNDER TEST = 1571 OR C128D
DEVICE # UNDER TEST = [8] or [9]
Page 2

1571/C128D SYSTEM TEST
VERSION 1.2.1
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1571 SINGLE DISK DRIVE (C128 ONLY)
40 COLUMN MONITOR OR TV SET
FORMATTED (WRITE-PROTECTED) DISKETTE
BLANK TEST DISKETTE
VERSION 1.2 DIAGNOSTIC DISKETTE
DESIGNED TO TEST : 1571 SINGLE OR C128D INTERNAL DISK DRIVE
SYSTEM TEST OPTION MENU
* Press (0) - Select De ice 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 Abo e Tests
* Press SPACE - Load Diagnostic Menu
SYSTEM TEST OPTION ONE — SELECT DEVICE NUMBER
* This option allows the System Test to be run on a system set to
either De ice Number [8] or [9].
* Selected De ice Number is Displayed
SYSTEM TEST OPTION TWO — ZERO STOP SENSOR TEST
* Insert a Formatted Write-Protected Diskette
* 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.
+-------------------------------------------------------------------------------+
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 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

1571/C128D SYSTEM TEST
VERSION 1.2.1
* Insert a Formatted Write-Protected Diskette
* Press SPACE - Start Testing
Begins Write-Protect Sensor Test
* Press RETORN - 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.
+------------------------------------------------------------------------------ +
FOR MOST ACCURATE TESTING THE FORMATTED DISKETTE BEING USED SHOOLD
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
* 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
Stop, in 1541 Mode, by bumping the Read/Write Head, (5 Times), against
the Zero Stop 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
+------------------------------------------------------------------------------ +
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
SYSTEM TEST OPTION THREE - WRITE PROTECT SENSOR TEST
Page 1-2

1571/C128D SYSTEM TEST
VERSION 1.2.1
* Insert a Blank Test Diskette
* Press (F) - Test Disk is Formatted
* Press (U) - Test Disk is UnFormatted
If the (0)nformatted Option is selected .... (Recommended)
* The Format Operation of the dri e 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 1541 Slow Mode is checked by ....
* Writing Data to Tracks 5, 15, 25, 35
* Reading and Verifying Data from Tracks 35, 25, 15, 5
* The GCR Fast Mode is checked by ....
* Writing Data to Tracks 40, 50, 60, 70
* Reading and Verifying Data from Tracks 70, 60, 50, 40
FAILURE - TEST DISKETTE DEFECTIVE OR NOT DOUBLE SIDED/DOUBLE DENSITY
MIS-ADJUSTED ZERO STOP SENSOR OR DRIVE ALIGNMENT
DEFECTIVE DRIVE ASSEMBLY
DEFECTIVE READ/WRITE CONTROL LOGIC
* The MFM Burst Format Operation is checked by Formatting ....
SYSTEM TEST OPTION FIVE - READ/WRITE TESTS
TRACK BYTES/SECTOR
01 128
02 512
36 1024
37 256
38 512
39 128
Page 1-3

1571/C128D SYSTEM TEST
VERSION 1.2.1
* The MFM Burst Read/Write Operations are checked by ....
* Writing, Reading and Comparing Data on ....
SIDE TRACK BYTES/SECTOR SIDE TRACK BYTES/SECTOR
001 128 179 128
002 512 178 512
0 36 1024 177 256
037 256 176 1024
038 512 142 512
039 128 141 128
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 Dri e Set to De ice Number [8]
* Press (9) - Second Dri e Set to De ice 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
erified on a second dri e which may be set to either De ice Number [8]
or De ice Number [9].
* This helps determine if Data Written on the dri e
under test can be read by other dri es.
* The GCR 1541 Slow Mode Compatibility is checked by ....
* Reading and Verifying GCR Data, written during the Read/Write Test,
from Tracks 5, 15, 25, 35
* The GCR 1571 Fast Mode Compatibility is checked by ....
* Reading and Verifying GCR Data, written during the Read/Write Test,
from Tracks 40, 50, 60, 70
Page 1-4

1571/C128D SYSTEM TEST
VERSION 1.2.1
* The Burst MEM 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
001 128 179 128
0 02 512 1 78 512
0 36 1024 1 77 256
037 256 1 76 1024
038 512 142 512
039 128 141 128
FAILURE - MIS-ADJUSTED ZERO STOP OR ALIGNMENT ON ONE OF THE DRIVES
DEFECTIVE DRIVE ASSEMBLY IN 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 dri e is not a ailable.
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 1.2 Diagnostic Diskette
* Press (8) - Load the Diagnostic Menu from De ice Number [8]
* Press (9) - Load the Diagnostic Menu from De ice Number [9]
* Press RETURN - Return to Menu
Displays System Test Main Menu
Page 1-5

1571/C128D GCR/MFM SOFT ERROR TEST
VERSION 1.2.1
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1571 SINGLE DISK DRIVE (C128 ONLY)
COMMODORE OR COMPATIBLE PRINTER (OPTIONAL)
40 COLUMN MONITOR OR TV SET
BLANK TEST DISKETTE
VERSION 1.2 DIAGNOSTIC DISKETTE
The Soft Error Test does an Extended Read/Write Performance Test on
the Disk Dri e under test.
The Two (2) Soft Error Tests on the Version 1.2 Diagnostic Test Menu
are used to test both the GCR and MFM Modes of Operation.
DESIGNED TO TEST : 1571 SINGLE OR C128D INTERNAL DISK DRIVE
+------------------------------------------------------------------------------ +
| BOTH SOFT ERROR TESTS SHOULD BE RUN ON ALL UNITS IN FOR REPAIR |
+------------------------------------------------------------------------------ +
INSERT BLANK TEST DISKETTE
BEFORE SELECTING ANY OPTIONS
GCR/MFM SOFT ERROR TEST OPTION MENU
* Press RETURN - Start Test » 50 PASS
* Press (C) - Select De ice Number » [8] or [9]
* Press (X) - Preliminary Test » 2 PASS
* Press (M) - Modified Tests
* Press (0) - Read Test Results
* Press SPACE - Load Diagnostic Menu
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 dri e will be reset. All Test Results will
be stored on the test diskette and read at test end using Soft Error Test
Option Fi e (Read Test Results).
* To sa e 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, (1571 ONLY), UNTIL THE
TEST IS COMPLETE AND THE TEST RESULTS ARE READ.
+-------------------------------------------------------------------------------------------------------------------+
Page 1-6

1571/C128D GCR/MFM SOFT ERROR TEST
VERSION 1.2.1
This option allows the Soft Error Test to be run on a dri e which is
set to either De ice Number [8] or [9].
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
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 dri e will reset. Test Results are stored on the
Test Diskette and read at test end using Option Three. (Read Test Results)
* If the dri e passes this Preliminary Test, the 50 Pass Soft Error Test
(Soft Error Test Option One) should be run.
SOFT ERROR TEST OPTION TWO - SET DEVICE NUMBER UNDER TEST
- -------------------------------------------------------------------------------+
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, (1571 ONLY), 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 — Page 1-9
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 1-7

1571/C128D GCR/MFM SOFT ERROR TEST
VERSION 1.2.1
This option allows Special Parameters to be selected to create a
Custom Soft Error Test. The Parameter Options are as follows ....
1. 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 pre iously been used in the
Soft Error Test, the (N)ew Option must be selected.
2. 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
3. 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 Fore er.
4. 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 Pre iously Selected, (Y)es Must be
Selected here.
5. 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. (GCR - Tracks 1 thru 70
--- MFM - Tracks 1-79)
* If (R)andom is Selected, the Tracks are Tested in a Random
Fashion, Allowing Complete Exercise of the Stepper Motor.
6. RESET OR BLINK AT TEST END
This option allows the Dri e 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 Dri e Will be Reset at Test End
* After Reset, all Disk Acti ity, including the Flashing
Acti ity LED will cease.
* If (B)link is Selected, the Dri e LED will Blink in a
Series of (1) Flash Codes at Test End
* If (B)link is Selected, the Dri e Must be Manually Reset
before Test Results can be Read.
* 1571 - Turn Dri e Power OFF And ON
* C128D - Press Dri e Reset Switch
MODIFIED SOFT ERROR TEST OPTION MENU - CREATE CUSTOM ERROR TESTS
Page 1-8

1571/C128D GCR/MFM SOFT ERROR TEST
VERSION 1.2.1
This option allows setting of the Dri e 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
+-------------------------------------------------------------------------------------------------------------------+
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
+------------------------------------------------------------------------------ +
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 ....
MODIFIED SOFT ERROR TEST OPTION TWO - BLINK/RESET LED AT TEST END
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. 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 Reco er the Error.
* If this Count Reaches (1024), the Test Will Terminate
* Maximum Errors = Total Passes di ided by a Set Value
3. COUNTABLE ERRORS
The Total Number of encountered errors that required more than
one (1) retry to reco er.
* Countable Errors = Total Errors minus Reco ered Errors
* Maximum Countable Errors = Total Passes di ided by a Set Value
4. PASS/ERROR RATIO
The Number of Passes ersus the Number of Encountered Errors
* Pass/Error Ratio = Number of Passes di ided by Countable Errors
* Minimum Pass/Error Ratio = Number of Passes di ided 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 Fi e (5), a Defecti e 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
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1571/C128D GCR/MFM SOFT ERROR TEST
VERSION 1.2.1
6. TRACK, ERRORS, FIRST PASS RETRIES
This listing breaks down all Encountered Errors on a Per Track Basis.
* A Defecti e 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 Consecuti e 1 Bits) , on a gi en 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 erify with Data Stored in Disk Memory
* WRITE PROTECT ERROR
* A Write Operation to the diskette cannot be performed due to ....
* Write-Protect Tab installed on the Diskette
* Defecti e Write-Protect Sensor
* Displayed Only During the MFM Soft Error Test
* 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.
* Displayed Only During the MFM Soft Error Test
* DATA DECODE ERROR
* The GCR Bytes, when con erted to their Original Binary Form,
did not compare to the Original Binary Code Written
* Displayed Only During the GCR Soft Etror Test
Data Block Checksum Errors and Data Decode Errors are normally caused
by Random Electrical Noise and will usually Reco er in One (1) Retry
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