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
+t
£ e +
+
He
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
*
+e
he
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
+e
+
&
&
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