C64-C64C Service Manual 314001-03 1992 Mar, C-64 PDF book
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SERVICE MANUAL
C64/C64C
MARCH, 1992
PN-314001-03
Commodore Business Machines, Inc.
1200Wilson Drive, WestChester, Pennsylvania 19380 U.S.A.
Commodore makes no express or implied warranties
with regard to the information contained herein. The
information is madeavailable solelyon an as is basis,
and the entire risk asto completeness, reliability, and
accuracy is with the user. Commodore shall not be
liable for any damages in connection with the use of
the information contained herein. The listing of any
available replacement 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 express permission, of
editorial orpictorial content, in anymatteris prohibited.
This manual containscopyrighted and proprietaryinformation. Nopart
ofthispublication maybe reproduced, stored in aretrievalsystem, or
transmitted in anyformorbyanymeans, electronic, mechanical, photo
copying, recording orotherwise, withoutthe priorwritten permission
of Commodore Electronics Limited.
Copyright © 1992 by Commodore Electronics Limited.
All rights reserved.
Printed in U.S.A.
CONTENTS
Title
Page
SPECIFICATIONS
1
PRODUCT PARTS LIST
2
BLOCK DIAGRAM
3
CIRCUIT THEORY
POWER SUPPLY
4
RESET LOGIC
5
CLOCK CIRCUITS
6
I/O, ROM, EXPANSION PORT
7
RAM CONTROL LOGIC
8
5 PIN VIDEO AND AUDIO OUTPUTS
9
8 PIN VIDEO AND AUDIO OUTPUTS
10
CASSETTE INTERFACE
11
KEYBOARD, JOYSTICK & PADDLE INTERFACES
12
SERIAL INTERFACE, USER PORT
13
TROUBLESHOOTING GUIDE
14
BOARD IDENTIFICATION
17
PCB ASSEMBLY #326298-01
BOARD LAYOUT
18
PARTS LISTS
19,20
PIN ASSIGNMENTS
21
SCHEMATIC #326106
21,22
PCB ASSEMBLY #250407-04
BOARD LAYOUT
23
PARTS LIST
24,25
MODULATOR SCHEMATIC #251025
26
SCHEMATIC #251138
26,27
PIN ASSIGNMENTS
27
PCB ASSEMBLY #250425-01
BOARD LAYOUT
28
PARTS LIST
29,30
MODULATOR SCHEMATIC #251696
31
SCHEMATIC #251469
31,32
PIN ASSIGNMENTS
32
CONTENTS (continued)
Title
Page
SERVICE REFERENCE DIAGRAM B-3
33
B-3 PCB PARTS LIST
34
B-3 BOARD LAYOUT
36
B-3 SCHEMATICS #252278
37
SERVICE REFERENCE DIAGRAM - E
39
E PCB PARTS LIST
40
E BOARD LAYOUT
41
E SCHEMATIC #252312
42
C64
COMPUTER
GENERAL DESCRIPTION
• The "All Purpose" Commodore 64 is the complete computer for
education, home or small business applications. Supported by
quality peripherals and a full range of software, the Commodore 64
is perfect for the family. No other computer can offer such variety
of uses and applications at such an affordable price.
MEMORY
• 64K RAM
ROM
• 20K ROM Standard (includes operating system and BASIC
interpreter)
MICROPROCESSOR
• 6510A Microprocessor—1.02 MHz clock • Compatible with
the 6502
DISPLAY
• 40 Columns X 25 lines of text
COLORS
• 16 Background, border and character colors
CHARACTERS
• Upper & lower case letters, numerals and symbols • Reverse
characters • All PET graphic characters
DISPLAY MODES
• Text characters • High resolution graphics
RESOLUTION
• 320 X 200 Pixels
SPRITES
• 8 independent sprites • Each consists of 24 X 21 pixels and
up to 4 colors • Each independently expandable horizontally
and vertically • Collision detection for sprite to sprite and data
to sprite collisions
SOUND
• 6581 Sound Interface Device includes 3 independent tone
generators—each with 9 octaves • Each voice includes
programmable ADSR generator (Attack, Decay, Sustain, Release)
and control of sawtooth, triangle, square, variable pulse and noise
waveforms • Full filtering capabilities with low, high and band
pass filters • External sound input
KEYBOARD
• Full size typewriter style design
KEYS
• 66 Keys total • 2 Cursor control keys • 4 Function keys (up
to 8 user defined/programmable functions possible) • Upper and
lower case character set • Graphic character set
INPUTS/OUTPUTS
• User port • Serial port • ROM cartridge port • 2 Joystick/
paddle ports • Video port • C1530 Cassette drive interface port
FEATURES
• Built-in BASIC 2.0—over 70 commands, statements and
functions • Full screen editor
PERIPHERALS
• C1541 Diskdrive • C1530 Datasette • MPS 801 Dot matrix
printer • MPS 802 Dot matrix printer • MPS 803 Dot matrix
printer • DPS 1101 Daisey wheel printer • C1520
Plotter/Printer • C1702 Color monitor • CM141 Color monitor
POWER REQUIREMENTS
• 120 Volts, 60 Hz
Specifications subject to change without notice.
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SERVICE MANUAL
C64/C64C
MARCH, 1992
PN-314001-03
Commodore Business Machines, Inc.
1200Wilson Drive, WestChester, Pennsylvania 19380 U.S.A.
Commodore makes no express or implied warranties
with regard to the information contained herein. The
information is madeavailable solelyon an as is basis,
and the entire risk asto completeness, reliability, and
accuracy is with the user. Commodore shall not be
liable for any damages in connection with the use of
the information contained herein. The listing of any
available replacement 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 express permission, of
editorial orpictorial content, in anymatteris prohibited.
This manual containscopyrighted and proprietaryinformation. Nopart
ofthispublication maybe reproduced, stored in aretrievalsystem, or
transmitted in anyformorbyanymeans, electronic, mechanical, photo
copying, recording orotherwise, withoutthe priorwritten permission
of Commodore Electronics Limited.
Copyright © 1992 by Commodore Electronics Limited.
All rights reserved.
Printed in U.S.A.
CONTENTS
Title
Page
SPECIFICATIONS
1
PRODUCT PARTS LIST
2
BLOCK DIAGRAM
3
CIRCUIT THEORY
POWER SUPPLY
4
RESET LOGIC
5
CLOCK CIRCUITS
6
I/O, ROM, EXPANSION PORT
7
RAM CONTROL LOGIC
8
5 PIN VIDEO AND AUDIO OUTPUTS
9
8 PIN VIDEO AND AUDIO OUTPUTS
10
CASSETTE INTERFACE
11
KEYBOARD, JOYSTICK & PADDLE INTERFACES
12
SERIAL INTERFACE, USER PORT
13
TROUBLESHOOTING GUIDE
14
BOARD IDENTIFICATION
17
PCB ASSEMBLY #326298-01
BOARD LAYOUT
18
PARTS LISTS
19,20
PIN ASSIGNMENTS
21
SCHEMATIC #326106
21,22
PCB ASSEMBLY #250407-04
BOARD LAYOUT
23
PARTS LIST
24,25
MODULATOR SCHEMATIC #251025
26
SCHEMATIC #251138
26,27
PIN ASSIGNMENTS
27
PCB ASSEMBLY #250425-01
BOARD LAYOUT
28
PARTS LIST
29,30
MODULATOR SCHEMATIC #251696
31
SCHEMATIC #251469
31,32
PIN ASSIGNMENTS
32
CONTENTS (continued)
Title
Page
SERVICE REFERENCE DIAGRAM B-3
33
B-3 PCB PARTS LIST
34
B-3 BOARD LAYOUT
36
B-3 SCHEMATICS #252278
37
SERVICE REFERENCE DIAGRAM - E
39
E PCB PARTS LIST
40
E BOARD LAYOUT
41
E SCHEMATIC #252312
42
C64
COMPUTER
GENERAL DESCRIPTION
• The "All Purpose" Commodore 64 is the complete computer for
education, home or small business applications. Supported by
quality peripherals and a full range of software, the Commodore 64
is perfect for the family. No other computer can offer such variety
of uses and applications at such an affordable price.
MEMORY
• 64K RAM
ROM
• 20K ROM Standard (includes operating system and BASIC
interpreter)
MICROPROCESSOR
• 6510A Microprocessor—1.02 MHz clock • Compatible with
the 6502
DISPLAY
• 40 Columns X 25 lines of text
COLORS
• 16 Background, border and character colors
CHARACTERS
• Upper & lower case letters, numerals and symbols • Reverse
characters • All PET graphic characters
DISPLAY MODES
• Text characters • High resolution graphics
RESOLUTION
• 320 X 200 Pixels
SPRITES
• 8 independent sprites • Each consists of 24 X 21 pixels and
up to 4 colors • Each independently expandable horizontally
and vertically • Collision detection for sprite to sprite and data
to sprite collisions
SOUND
• 6581 Sound Interface Device includes 3 independent tone
generators—each with 9 octaves • Each voice includes
programmable ADSR generator (Attack, Decay, Sustain, Release)
and control of sawtooth, triangle, square, variable pulse and noise
waveforms • Full filtering capabilities with low, high and band
pass filters • External sound input
KEYBOARD
• Full size typewriter style design
KEYS
• 66 Keys total • 2 Cursor control keys • 4 Function keys (up
to 8 user defined/programmable functions possible) • Upper and
lower case character set • Graphic character set
INPUTS/OUTPUTS
• User port • Serial port • ROM cartridge port • 2 Joystick/
paddle ports • Video port • C1530 Cassette drive interface port
FEATURES
• Built-in BASIC 2.0—over 70 commands, statements and
functions • Full screen editor
PERIPHERALS
• C1541 Diskdrive • C1530 Datasette • MPS 801 Dot matrix
printer • MPS 802 Dot matrix printer • MPS 803 Dot matrix
printer • DPS 1101 Daisey wheel printer • C1520
Plotter/Printer • C1702 Color monitor • CM141 Color monitor
POWER REQUIREMENTS
• 120 Volts, 60 Hz
Specifications subject to change without notice.
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