Index of ftp.funet.fi:/pub/cbm/schematics - all files

Here are schematic diagrams of different Commodore devices. You may also want to visit http://www.agtannenbaum.com/ (USA) or http://www.schaltungsdienst.com/ (Germany) who sell service manuals and schematic diagrams for various devices.
ALLFILES
Index of all files under the /pub/cbm/schematics tree, text version.
ALLFILES.html
Index of all files under the /pub/cbm/schematics tree, HTML version.
cartridges/
Cartridges for various computers
c64/
External cartridges for the Commodore 64
cpm/
The Commodore 64 CP/M cartridge has a Z80 processor running at 1 MHz. The schematic diagram of the cartridge was reverse-engineered by Ruud Baltissen. There is also some documentation on this cartridge in early prints of the Commodore 64 Programmer's Reference Guide. In later prints, the pages that originally described the CP/M cartridge were left blank.
README
Ruud Baltissen's technical overview of the CP/M cartridge and some comments.
schematics-big.gif
Big version of the schematic diagram, 2271x1545 pixels.
schematics-small.gif
Small version of the schematic diagram, 1136x773 pixels.
schematics.hdf
schematics.sch
UltiCap files of the cartridge, drawn by Ruud Baltissen.
demodisks@ (link)
demodisks@ (link)
ieee-488/
Commodore's IEEE-488 cartridge for the Commodore 64. Reverse-engineered by Wolfgang Günther <woll@Informatik.Uni-Bremen.DE>.
README
Description of the interface, including hints to design errors of the original interface
eprom.bin
The firmware (4 kB, raw binary)
schematics.ps
Schematic diagram of the interface in PostScript format
schematics.tif
Schematic diagram of the interface in TIFF format
magic-voice/
The Commodore Magic Voice cartridge is a speech synthesizer with a very limited vocabulary of English. For more information about the cartridge, see http://calvin.ptloma.edu/%7Espectre/ckb/secret/operiph.html. There are no schematic diagrams of the cartridge available yet.
251476.bin
Firmware of the Commodore Magic Voice cartridge, read from an EPROM. The high part of the ROM is mapped into $E000-$FFFF, the low part into $A000-$BFFF.
sfx/
The Commodore SFX Sound Expander was designed by Richard Watts of Music Sales Ltd and sold by Commodore as part of the 'Commodore SFX' product line. The cartridge uses an FM synthesis chip, the YM3256 OPL, which is similar to the YM3812 OPL2 chip used in the AdLib and SoundBlaster cards for IBM PC compatibles.
analogue.jpg
Analogue part of the Sound Expander, reverse-engineered and hand-drawn by Richard Atkinson.
digital.jpg
Digital interface of the Sound Expander, reverse-engineered and hand-drawn by Richard Atkinson.
sfx-sch.gif
Schematic for the Commodore C64/C128 Sounder Expander cartridge. Both analogue and digital parts; reverse-engineered.
demodisks@ (link)
userport@ (link)
userport/
Cartridges for the user port (Commodore 64 and VIC-20)
1011005.gif
VIC-1011 RS-232C adapter rev.A, assy number 1011005.
vic20/
Cartridges for the VIC-20
ieee-488/
CBM IEEE-488 cartridge VIC-1112, reverse-engineered by Wolfgang Günther <woll@Informatik.Uni-Bremen.DE>
325329-04.bin
Firmware for the cartridge (325329-03 has the same contents)
README
Description of the interface and of the schematic diagrams
schematics.ps
Schematic diagram of the interface in PostScript format
schematics.tif
Schematic diagram of the interface in TIFF format
userport@ (link)
computers/
Here are schematic diagrams of different Commodore computers.
b/
The Commodore Model B service manual and schematic diagrams
314010-06-i.gif
Service manual, B model computer (Jan. 1985, PN-314010-06), title page
314010-06-ii.gif
Service manual, B model computer, table of contents
314010-06-p1.gif
Page 1: block diagram
314010-06-p2.gif
Page 2: B model parts list
314010-06-p3-left.gif
314010-06-p3-right.gif
Page 3: 8256048 board layout
314010-06-p4.gif
Page 4: 8256048 PCB parts
314010-06-p5.gif
Page 5: 8256048 PCB parts, continued
314010-06-p6-left.gif
314010-06-p6-right.gif
Page 6: keyboard matrix
4256004-01-left.gif
4256004-01-parts.gif
4256004-01-right.gif
Switching power supply
8256043-01of14-left.gif
8256043-01of14-right.gif
µP, address & data buffers, bus arbitration
8256043-02of14-left.gif
8256043-02of14-right.gif
master timing
8256043-03of14-left.gif
8256043-03of14-right.gif
DRAM address & refresh
8256043-04of14-left.gif
8256043-04of14-right.gif
DRAMs, segments 1-2
8256043-05of14-left.gif
8256043-05of14-right.gif
DRAMs, segments 3-4
8256043-06of14-left.gif
8256043-06of14-right.gif
ROM array, 1k×8 static RAM
8256043-07of14-left.gif
8256043-07of14-right.gif
system decode
8256043-08of14-left.gif
8256043-08of14-right.gif
CRTC, video shift register
8256043-09of14-left.gif
8256043-09of14-right.gif
video RAM, address mux, latch
8256043-10of14-left.gif
8256043-10of14-right.gif
keyboard port, RS232C
8256043-11of14-left.gif
8256043-11of14-right.gif
user I/O ports, IEEE
8256043-12of14-left.gif
8256043-12of14-right.gif
SID, dot clock oscillator, expansion connector
8256043-13of14.gif
video output, power indicator
8256043-14of14.gif
I.C. count, power consumption
8256059-01.gif
8256059-02.gif
8256059-03.gif
8256059-04.gif
8256059-05.gif
8256059-06.gif
8256059-07.gif
8256059-08.gif
8256059-09.gif
8256059-10.gif
8256059-11.gif
8256059-12.gif
These schematics seem to be quite identical with 8256043.
README
General information about the Commodore Model II computers.
drives@ (link)
firmware@ (link)
c128/
The Commodore 128 existed in three different major board versions: The first board was used in the flat 128 and in the plastic-cased 128D. Then came the 128DCR board, with the floppy controller integrated on the motherboard. There was also a 128CR (cost-reduced flat 128).
310378-1-left.gif
310378-1-right.gif
310378-2-left.gif
310378-2-right.gif
310378-3-left.gif
310378-3-right.gif
310378-4-left.gif
310378-4-right.gif
These are the schematic diagrams of the Commodore 128 main board ("flat C128" and C128D in plastic case). They were on eight pages in the Commodore 128 Programmer's Reference Guide, two pages containing one engineering sheet.
310378-update.zip
Update to the Commodore 128 Service Manual, containing the two revised pages in the 310378 schematic revision 7A.
c128cr.jpg
A black&white picture of a cost-reduced flat Commodore 128 circuit board. This model never entered mass production; this is an engineering sample possessed by Raymond Carlsen. The board says "PCB ASSY NO. 250783", "C= commodore C128CR REV.3", "PCB NO. 252270", and "C128CR No.2 ENG. SAMPLE Jun/9/'86 KNT".
c128dcr-1-left.gif
c128dcr-1-right.gif
c128dcr-2-left.gif
c128dcr-2-right.gif
c128dcr-3-left.gif
c128dcr-3-right.gif
c128dcr-4-left.gif
c128dcr-4-right.gif
c128dcr-5-left.gif
c128dcr-5-right.gif
These are the schematic diagrams of the Commodore 128DCR main board (metal case C128D with built-in 1571CR floppy controller). The diagrams were scanned from a 64'er Sonderheft, and they appear to be a copy of schematic 252451.
According to Nicolas Welte, there is an error on the right half of page 5. The 74LS14 hex Schmitt-trigger inverter U113, pin 13 is connected to WPRT* (misprinted WTRT* on U105), which doesn't make any sense. Obviously it should be connected to STP1 instead, which is three lines more to the right!
drives@ (link)
firmware@ (link)
manual/
Service Manual C-128/C128D Computer, November 1987, PN-314001-08
00-title.gif
Title page
00.gif
Table of contents
01.gif
Specifications
02.gif
Parts list
03.gif
Block diagram (wide sheet)
04.gif
Bus architecture
05.gif
06.gif
8502 microprocessor
07.gif
08.gif
Z-80 microprocessor
09.gif
10.gif
11.gif
Memory architecture
12.gif
13.gif
14.gif
15.gif
Read Only Memory
16.gif
17.gif
Random Access Memory
18.gif
19.gif
20.gif
Memory Management Unit
21.gif
22.gif
23.gif
24.gif
25.gif
26.gif
27.gif
28.gif
Programmed Logic Array
29.gif
30.gif
8701 clock generator
31.gif
Video interface
32.gif
33.gif
8564 Video Interface Chip
34.gif
35.gif
36.gif
8563 Video Controller
37.gif
38.gif
39.gif
8568 CRT Controller
40.gif
41.gif
8580 Sound Interface Device
42.gif
43.gif
44.gif
45.gif
46.gif
47.gif
Floppy disk drive read/write head amplifier
48l.gif
48r.gif
49.gif
Input/Output circuits: Cassette interface
50.gif
51.gif
Keyboard
52.gif
Expansion bus
53.gif
54.gif
Serial bus
55.gif
56.gif
Troubleshooting: Common line definitions
57.gif
Common ICs (pin assignments and logic)
58.gif
59.gif
60.gif
62.gif
64.gif
PCB assembly #310379 rev. 6
65.gif
66l.gif
67l.gif
68l.gif
69l.gif
71.gif
PCB assembly #310379 rev. 7
72.gif
73l.gif
74l.gif
75l.gif
76l.gif
80l.gif
C128D major parts
81l.gif
C128D component parts
power/
Power supplies of the Commodore 128 computers
Scanned by Martin Buchty, uploaded by Oliver Weissflach, improved by William Levak
ps-128.gif
External switching power supply for the flat Commodore 128
ps-128d-german.gif
Internal switching power supply for the 128D (plastic case), German version (Schaffer BV 223-5-04008)
ps-128d-japanese.gif
Internal switching power supply for the 128D (plastic case), Japanese version (Nagano Japan Radio Co. Ltd, 310639-03, NJD-1978)
ps-128dcr-usa.gif
Internal switching power supply for the 128DCR (metal case), USA version; includes measurement points and expected waveforms
ps-128dcr1.gif
Internal switching power supply for the 128DCR (metal case), 1st version (linearly regulated 12 volts DC output)
ps-128dcr2.gif
Internal switching power supply for the 128DCR (metal case), 2nd version (Tohoku Metal Industries 1403Et, 5628-C001-00)
c64/
Here are some schematic diagrams of the Commodore 64.
250469-rev.A-left.gif
250469-rev.A-right.gif
250469-rev.B-right.gif
Commodore 64c rev.A and rev.B (new design). The 64c boards have the following texts: PCB ASSY NO. 250469 and PCB NO. 252311 REV.A (or B on newer boards). The difference between the two revisions is in the Gate Array chip: The one in rev.B includes COLOR RAM. That is why only the right half of the schematic diagram differs. The REV.A schematics also has the part number 252312.
251138-1of2.gif@ (link)
251138-2of2.gif@ (link)
Commodore 64 schematic diagram 251138 from the Service Manual
251469-1of2.gif@ (link)
251469-2of2.gif@ (link)
Commodore 64 schematic diagram 251469 from the Service Manual
252278-1.gif
252278-2.gif
Commodore 64 schematic diagram 252278. This seems to be an intermediate cost-reduced version, with 64kb×4 memory chips but small ROMs.
252312-left.gif
252312-right.gif
A bit better scan of the 250469 REV.A, with 8 levels of gray.
326106-1of2.gif@ (link)
326106-2of2.gif@ (link)
Commodore 64 schematic diagram 326106 from the Service Manual
c64-cassette-io.gif
A block diagram of the Commodore 64 cassette I/O circuitry. Taken from the SAMS C64 Troubleshooting Guide.
c64-powersupply.gif
A block diagram of the Commodore 64 internal power supply (how the +12V, +9V and TOD clock signals are generated from the 9V AC input). Taken from the SAMS C64 Troubleshooting Guide.
c64-r1.chips.gif
A chip location diagram of the first C64 board revision. Assy number unknown, or maybe 251138. Taken from the SAMS C64 Troubleshooting Guide.
c64-video.gif
A block diagram of the video circuitry in the first C64 board revision. Taken from the SAMS C64 Troubleshooting Guide.
c64bus.gif
A block diagram of the bus signals in the C64.
c64extps.gif
Commodore 64 Power Supply, part no. 902503-02, input 116V 60Hz 40W. This is the North American power supply that can be taken apart. The schematic was drawn by William Levak. According to him, the transistor and the 300 ohm resistor can be removed and replaced with a standard +5V 750mA voltage regulator, which is much more reliable.
ciasid.gif
CIA and SID pinouts and general data
cpupla.gif
6510 and PLA pinouts and general data
mem.gif
2048k*8 SRAM pinout and general data. VIA pinout.
modulator-251025.gif@ (link)
Modulator schematic 251025 from the Service Manual
modulator-251696.gif@ (link)
Modulator schematic 251696 from the Service Manual
prg-cpu-left.gif
prg-cpu-right.gif
prg-vic-left.gif
prg-vic-right.gif
Commodore 64 schematic diagram, scanned with 360 DPI, 2 colours. This seems to be the same (buggy) schematic that was published in the Commodore 64 Programmer's Reference Guide, but has been partially translated into German.
The vic part contains the ROMs, SIDs, Video Controller, RAMs, Address-decoding, Expansion Port and User Port.
The cpu part contains the Port elements (CIA), CPU, AC-Adaptor, Timer, Port Layout
All resistors are 0.25W ±5% and all capacitors are in µF, unless otherwise stated.
ultimax.gif
Commodore VIC-10, a.k.a. UltiMax a.k.a. "Vickie" schematic diagram, drawn by Ruud Baltissen. For more information on this extremely rare machine, see http://www.funet.fi/pub/cbm/html/c64/ultimax.html.
cartridges@ (link)
drives@ (link)
firmware@ (link)
manual-html/
manual/
Service Manual, Model C64 Computer, Feb. 1985 PN-314001-02
c64--title.gif
title page
c64-00.gif
contents
c64-01.gif
specifications
c64-02.gif
major parts
c64-03.gif
block diagram
c64-04.gif
c64-05.gif
c64-06.gif
c64-07.gif
c64-08.gif
c64-09.gif
c64-10.gif
c64-11.gif
c64-12.gif
c64-13.gif
circuit theory
c64-14.gif
c64-15.gif
c64-16.gif
troubleshooting guide
c64-17.gif
board identification
c64-18.gif
board layout #326298-01
c64-19.gif
c64-20.gif
parts list for 326298
c64-21l.gif
6526 and 6581 pinouts
c64-21r.gif
schematic 326106 sheet 1 of 2
c64-22l.gif
RAM information
c64-22r.gif
schematic 326106 sheet 2 of 2
c64-23.gif
board layout #250407-04
c64-24.gif
c64-25.gif
parts list for 250407-04
c64-26l.gif
modulator schematic #251025
c64-26r.gif
schematic 251138 sheet 1 of 2
c64-27l.gif
6510 and PLA pinouts
c64-27r.gif
schematic 251138 sheet 2 of 2
c64-28.gif
board layout #250425-01
c64-29.gif
c64-30.gif
parts list for 250425-01
c64-31l.gif
modulator schematic #251696
c64-31r.gif
schematic #251469 sheet 1 of 2
c64-32l.gif
video chip pinout
c64-32r.gif
schematic #251469 sheet 2 of 2
sx-64/
251103_l.gif
251103_r.gif
The SX-64 CPU board, rev.A. Assy number 251103.
251107_l.gif
251107_r.gif
The SX-64 I/O board, rev.A. Assy number 251107.
251110_l.gif
251110_r.gif
The SX-64 FDD board, rev.A. Assy number 251110.
power_l.gif
power_r.gif
The SX-64 power supply.
p500/
Commodore 500, a.k.a. PET II schematic diagrams
4256041-01of15.gif
Commodore 500 µP, address & data buffers, arbitration logic
4256041-02of15.gif
system decode & buffer control
4256041-03of15.gif
VIC; video memory; video bus buffers
4256041-04of15.gif
SID; 192k DRAM array refresh logic
4256041-05of15.gif
192k DRAM address mux & control
4256041-06of15.gif
192k*8 DRAM array [64k standard, 128k optional]
4256041-07of15.gif
64k DRAM array and address mux
4256041-08of15.gif
system ROM/RAM array
4256041-09of15.gif
gameport interface; keyboard interface; RS232C interface
4256041-10of15.gif
interrupt prioritization; IEEE488 interface; user/game port interface
4256041-11of15.gif
cassette i/f port
4256041-12of15.gif
main oscillators & PLL
4256041-13of15.gif
video output circuit
4256041-14of15.gif
[List of power filter capacitors for each IC]
4256041-15of15.gif
[FPLA logic equations]
README
Information about the Commodore 500 a.k.a. PET II.
keyboard.txt
Commodore P500 Keyboard Schematic. Composed by Tony Duell <ard@p850ug1.demon.co.uk>.
drives@ (link)
firmware@ (link)
pet/
answers.txt
Some answers to questions about the PET system boards. Written by William M. Levak.
diagnostics.txt
Description for the diagnostic connectors for the original PET. Written by William M. Levak.
2001/
The PET 2001, the first microcomputer by Commodore.
320008-2.gif
320008-3.gif
Schematic 320026 sheets 2 and 3 of 3 for circuit board 320008 with 6540
ROMs and 6550 RAMs.
320081-2.gif
320081-3.gif
Schematic 320082 sheets 2 and 3 of 3 for circuit board 320081 with 2316B ROMs and 6550 RAMs.
320130-1.gif
Schematic 320130 sheet 1 of 3. There were four variations of the original PET(static board). This first sheet applies to all.
320132-2.gif
320132-3.gif
Schematic 320130 sheets 2 and 3 of 3 for circuit board 320132 with 6540 ROMs and 2114 RAMs.
320137-2.gif
320137-3.gif
Schematic 320135 sheets 2 and 3 of 3 for circuit board 320137 with 2316B ROMs and 2114 RAMs.
notes-2.gif
Notes to go with video board schematic.
parts-1.gif
parts-2.gif
parts-3.gif
Parts list for the system board. These are very early lists and do not list any upgrade ROMs.
parts-4.gif
parts-5.gif
parts-6.gif
Parts list for the video board.
video-1.gif
Schematic of the video board.
video-2.gif
Schematic 320032 for second version of the video board.
video-3.gif
Schematic 320033 for third version of the video board.
video-layout.gif
Video board parts layout. The original is in black with blue shading.
The quality of the printed copy may depend critically on the quality of your printer.
2001N/
This is the service information on the 2001N/3000/4000 (no CRTC). This is the dynamic system board.
320349-1.gif
Schematic 320349 page 1 of 9, microprocessor-memory expansion
320349-2.gif
Schematic 320349 page 2 of 9, IEEE-488 interface
320349-3.gif
Schematic 320349 page 3 of 9, cassette & keyboard
320349-4.gif
Schematic 320349 page 4 of 9, ROMs
320349-5.gif
Schematic 320349 page 5 of 9, RAMs
320349-6.gif
Schematic 320349 page 6 of 9, master timing
320349-7.gif
Schematic 320349 page 7 of 9, Display logic
320349-8.gif
Schematic 320349 page 8 of 9, Display RAMs
320349-9.gif
Schematic 320349 page 9 of 9, voltage regulator
320351-1.gif
320351-2.gif
320351-3.gif
320351-4.gif
320351-5.gif
parts list
320351-6.gif
parts layout and jumper information
321445.gif
Schematic for 9" CRT display (later version than that with the 2001 schematics)
321446.gif
Parts layout for 9" CRT display, schematic 321445
321447-01.gif
321447-02.gif
321447-03.gif
321447-04.gif
321447-05.gif
321447-06.gif
321447-07.gif
321447-08.gif
321447-09.gif
321447-10.gif
Oscilliscope waveforms for test points indicated on 321445
8032/
320284.gif
Business keyboard specifications
321448.gif
12" CRT display schematic
321449.gif
12" CRT display parts layout
321450-01.gif
321450-02.gif
321450-03.gif
321450-04.gif
321450-05.gif
321450-06.gif
321450-07.gif
321450-08.gif
321450-09.gif
321450-10.gif
Oscilliscope traces of test points indicated on 321448
8032029-01.gif
schematic 8032029 sheet 1 of 11, CPU & memory expansion
8032029-02.gif
schematic 8032029 sheet 2 of 11, IEEE-488 interface
8032029-03.gif
schematic 8032029 sheet 3 of 11, cassette & keyboard
8032029-04.gif
schematic 8032029 sheet 4 of 11, ROMs
8032029-05.gif
schematic 8032029 sheet 5 of 11, main RAM
8032029-06.gif
schematic 8032029 sheet 6 of 11, master timing
8032029-07.gif
schematic 8032029 sheet 7 of 11, display address mux
8032029-08.gif
schematic 8032029 sheet 8 of 11, dot gen & display RAMs
8032029-09.gif
schematic 8032029 sheet 9 of 11, odd display RAMs
8032029-10.gif
schematic 8032029 sheet 10 of 11, CRTC and sync buffers
8032029-11.gif
schematic 8032029 sheet 11 of 11, voltage regulator
8032030-1.gif
8032030-2.gif
8032030-3.gif
8032030-4.gif
8032030-6.gif
parts list for schematic 8032029
8032034.gif
schematic for 12" display (another version)
8032035.gif
parts layout for 8032034
8032051-1.gif
8032051-2.gif
parts for main power supply
8032051-3.gif
Main power supply parts layout and wiring diagram (this power supply is used in all later PETs and is almost identical to the power supply in previous PETs)
8296/
Commodore 8296 schematic diagram
324644-1of9.gif
CPU, ROM & Memory Expansion
324644-2of9.gif
IEEE488 Interface
324644-3of9.gif
User Port, Cassette & Keyboard
324644-4of9.gif
Main Dynamic RAM & Multiplexers
324644-5of9.gif
Video Display
324644-6of9.gif
Master Timing, Oscillator & Reset
324644-7of9.gif
Power Supply
324644-8of9.gif
64k-Dyn RAM & Logic, Addon
324644-9of9.gif
Block Diagram
SuperPET/
SuperPET or MicroMainFrame 9000 additional boards. A later version has all boards combined into one.
324037-1.gif
324037-2.gif
Schematic of the 6809 system board
324038-1.gif
324038-2.gif
324038-3.gif
324038-4.gif
Parts list for the 6809 system board
324038-5.gif
Parts layout for the 6809 system board
324041-1.gif
324041-2.gif
324041-3.gif
Schematics for 64K memory board (not compatible with the 8096 64K board)
324042-1.gif
324042-2.gif
324042-3.gif
324042-4.gif
Parts list for the memory board
324042-5.gif
Parts layout for the memory board
324052.gif
Assembly diagram for SuperPET boards
324055.gif
Schematic for 6702 daughter board. (The function of the 6702 is unknown. Commodore refused to provide any information on this chip, claiming it was proprietary information.)
324056.gif
Parts list and layout of the 6702 board
9000007-1.gif
9000007-2.gif
9000007-3.gif
Parts list for the combined SuperPET board
9000016.gif
Schematic for the combined SuperPET board
9000035.gif
Assembly diagram for the combined SuperPET board
drives@ (link)
firmware@ (link)
re/
Here you will find the schematic diagrams of the Commodore PET computers drawn by Ruud Baltissen. Everything else is covered except the power supply and the power connector.
3008.gif
The PET 3008 schematic diagram. UltiCap source files are available from the author.
3008.txt
Release notes for the PET 3008 schematic diagram.
8032.gif
The schematic diagram produced at 75 dpi, 2752x1884 pixels.
8032.txt
Release notes for the PET 8032 schematic diagram.
univ/
This is the universal system board used in the 4000-12 and later 8032 computers.
8032080-1.gif
8032080-2.gif
8032080-3.gif
8032080-4.gif
8032080-5.gif
8032080-7.gif
parts list for universal system board
8032081-01.gif
8032081-02.gif
8032081-03.gif
8032081-04.gif
8032081-05.gif
8032081-06.gif
8032081-07.gif
8032081-08.gif
8032081-09.gif
8032081-10.gif
8032081-11.gif
Schematics for the universal system board. Most are the same as the 8032 system board, but with the addition of jumpers to be configured as a 40 col. computer.
univ2/
Universal system board (later version). There are many small changes, mostly ferrite beads, and filter capacitors. There are also fewer memory options on this board.
8032087-01.gif
8032087-02.gif
8032087-03.gif
8032087-04.gif
8032087-05.gif
8032087-06.gif
8032087-07.gif
8032087-08.gif
8032087-09.gif
8032087-10.gif
8032087-11.gif
System board schematics, pages 1 to 11 of 11. Titles are the same as 8032 and previous universal board.
8032090-1.gif
8032090-2.gif
8032090-3.gif
8032090-4.gif
8032090-5.gif
parts list for system board.
8032090-7.gif
parts layout and jumper configuration.
plus4/
c116-251239-1.gif
Commodore 116 schematic 251239, sheet 1 of 3. Expansion port, cassette port, audio/video connector, RF modulator, power supply, clock circuitry.
c116-251239-2.gif
Commodore 116 schematic 251239, sheet 2 of 3. TED, processor, joysticks, keyboard, ROM, RAM.
c116-251239-3.gif
Commodore 116 schematic 251239, sheet 3 of 3. PLA and address decoding.
c16-251788-1of3-left.gif
c16-251788-1of3-right.gif
Commodore 16 schematic 251788, sheet 1 of 3. Expansion port, cassette port, audio/video connector, RF modulator, power supply, clock circuitry.
c16-251788-2of3-left.gif
c16-251788-2of3-right.gif
Commodore 16 schematic 251788, sheet 2 of 3. TED, processor, joysticks, keyboard, ROM, RAM.
c16-251788-3of3-left.gif
c16-251788-3of3-right.gif
Commodore 16 schematic 251788, sheet 3 of 3. PLA and address decoding.
c16-251788-title.gif
Commodore 16 schematic 251788, title page.
connectors-1.jpg
Commodore plus/4 and C16 connectors. User port (plus/4 only) and cartridge port. Scanned from a Hungarian magazine.
connectors-2.jpg
Commodore plus/4 and C16 connectors, second part.
p4-left.jpg
Commodore plus/4 schematic sheet, left part. This is a very high-resolution scan taken from a Hungarian magazine.
p4-right.jpg
Commodore plus/4 schematic sheet, right part. This is a very high-resolution scan taken from a Hungarian magazine.
plus4-310164-1of4.gif
plus4-310164-2of4.gif
plus4-310164-3of4.gif
plus4-310164-4of4.gif
Commodore plus/4 schematic 310164 from the German plus/4 user's guide.
plus4-troubleshooting-1of4.gif
plus4-troubleshooting-2of4.gif
plus4-troubleshooting-3of4.gif
plus4-troubleshooting-4of4.gif
Commodore Techtopics 1984 issue 6. Troubleshooting the plus/4.
powersupply.gif
Commodore plus/4 power supply
timing.gif
Commodore plus/4 timing (Phi 0 and Phi 2 signals in the single clock and twice clock modes)
drives@ (link)
firmware@ (link)
manual/
Service Manual Model Plus 4 Computer Oct. 1984 PN-314001-04
p4--title.gif
title page
p4-00.gif
table of contents
p4-01.gif
p4-02.gif
specifications and overview
p4-03l.gif
case parts and accessories
p4-03r.gif
drawing of Plus/4
p4-04.gif
parts layout
p4-05.gif
p4-06.gif
parts list for circuit board 310163-01
p4-07l.gif
keyboard matrix, 7501 & 7360 pinouts
p4-07r.gif
schematic 310164(1 of 4)
p4-08l.gif
6551, PLA & 6529 pinouts and data
p4-08r.gif
schematic 310164(2 of 4)
p4-09l.gif
RAM pinout and sources, functional diagram
p4-09r.gif
schematic 310164(3 of 4)
p4-10l.gif
ROM pinouts
p4-10r.gif
schematic 310164(4 of 4)
p4-11.gif
RF modulator layout and schematic #251844
p4-12.gif
RF modulator layout and schematic #251311
p4-13.gif
p4-14.gif
p4-15.gif
p4-16.gif
troubleshooting aides
p4-17.gif
line definitions
p4-18.gif
engineering change - serial port, C-64, C-16, PLUS 4
vic20/
The VIC-20 and the VIC-20CR
251027l1.gif
251027l2.gif
251027l3.gif
251027r1.gif
251027r2.gif
251027r3.gif
VIC-20CR rev.D (NTSC, new design). Assy number 251027-01. The PAL model has a crystal frequency of 4433618 Hz, and there is an extra 56pF capacitor on the solder side of the board, soldered parallel to R5.
324001_1.gif
324001_2.gif
324001_3.gif
VC-20 rev.B (PAL, old design). Assy number 324001-03. Bad scanning quality.
vic20-left.tiff
vic20-middle.tiff
vic20-right.tiff
This diagram is scanned from the Commodore VIC-20 Programmer's Reference guide. It describes an early NTSC motherboard and most probably contains some errors, like the Commodore 64 schematic from the Commodore 64 PRG does.
vic20bus.gif
A block diagram of the VIC-20 bus signals.
vic20mod.gif
The VIC-20 RF modulator (PAL).
cartridges@ (link)
drives@ (link)
firmware@ (link)
datassette/
Datasette service manual model C2N/1530/1531, preliminary, Oct. 1984 PN-314002-02. Pages scanned in two parts are designated "l" and "r" for the left and right parts.
c2n.gif
This schematic is almost identical with the Commodore circuit board NP-090. It uses two dual op-amps instead of one quad op-amp.
cas--title.gif
title page
cas-00.gif
contents
cas-01.gif
cas-02.gif
specifications, overview
cas-03.gif
cas-04.gif
cas-05.gif
cas-06.gif
troubleshooting guide
cas-07.gif
PCB layout for #320009
cas-08l.gif
parts list for #320009
cas-08r.gif
schematic for #320009
cas-09.gif
PCB layout for #320109
cas-10l.gif
parts list for #320109
cas-10r.gif
schematic for #320109
cas-11.gif
PCB layout for #320275
cas-12l.gif
parts list for #320275
cas-12r.gif
schematic for #320275
cas-13.gif
PCB layout for #CMR-001-0
cas-14.gif
wiring diagram for #CMR-001-0
cas-15l.gif
parts list for #CMR-001-0
cas-15r.gif
schematic for #CMR-001-0
cas-16.gif
wiring diagram for #NP-090
cas-17l.gif
parts list for #NP-090
cas-17r.gif
schematic for #NP-090
cas-18.gif
PCB layout for #017-5001-01
cas-19.gif
wiring diagram for #017-5001-01
cas-20l.gif
parts list for #017-5001-01
cas-20r.gif
schematic for #017-5001-01
cas-update.gif
announcement of engineering change for CMR-001-0, 017-5001-01 & NP-090
drives/
Commodore disk drives
drives.txt
Drive mechanisms used by Commodore. Composed by William Levak.
new/
Here are schematic diagrams of new Commodore disk drives (with serial bus interface)
1541/
There are several versions of the Commodore 1541 disk drive. Some are covered by the technical manual, other schematics were scanned from later documents. There is even a reverse engineered diagram of the 1541-II drive.
1541-II-powersupply.gif@ (link)
Reverse-engineered schematic diagram of the 110-volt 1581 and 1541-II power supply. Created and uploaded by William Levak <wlevak@cyberspace.org>. According to him, you have to break the case open to get inside. Jameco sells a case that can be used to replace it.
1541-II.340503.gif
1541-II schematic diagram, by Commodore. According to the 1571 Service Manual, the Gate Array (251828 or 64H156) has some different revisions (-01, -02 and -03). Revisions -01 and -03 have only 40 pins, but -02 has 42 pins. Frank Kontros (jeno@kontr.uzhgorod.ua) reports that the (chinese) 1541-II boards he has seen only carry the assy no. 340503, although there are some differences. Also, his boards have the latest (-03) Gate Array, with some wiring on the pin 21 (OSC).
1541-II.gif
1541-II.readme
1541-II schematic diagram. Drawn and uploaded by Levente Hársfalvi (Levente@Mi.Stud.PMMFK.JPTE.HU).
boards.txt
Information about different 1541 board versions, composed by William Levak.
parts.txt
1540/1541/1541A/SX-64 drive parts list, composed by William Levak.
pla.txt
1541/1571 40/42 Pin Gate Arrays, composed by William Levak.
short-251748-rev.E-left.gif
short-251748-rev.E-right.gif
Short board 1541, assy no. 251748, rev.E, sheet 3 of 4. On this board, a 40-pin custom chip replaces some 74xx logic.
service/
tech/
Commodore Single Disk Drive, Technical Manual, Model 1540/1541, P/N 990445. There is no date, but it looks to be about 1984. This is an early version covering only the 1540 and 1541, with an update that covers the 1541B.
1541--title.gif
cover page
1541-00.gif
disclaimer
1541-01.gif
contents
1541-02.gif
1541-03.gif
introduction
1541-04.gif
1541-05.gif
1541-06.gif
1541-07.gif
1541-08.gif
1541-09.gif
1541-10.gif
1541-11.gif
1541-12.gif
1541-13.gif
1541-14.gif
1541-15.gif
1541-16.gif
drive mechanism description and parts diagrams
1541-17.gif
1541-18.gif
1541-19.gif
1541-20.gif
service procedures and adjustments
1541-21.gif
1541-22.gif
1541-23.gif
1541-24.gif
1541-25.gif
1541-26.gif
parts list for 1540048-01 circuit board(short board)
1541-27.gif
parts layout for 1540048-01 circuit board(short board)
1541-28.gif
schematic for 1540048-01 circuit board(short board)
1541-29.gif
1541-30.gif
1541-31.gif
1541-32.gif
1541-33.gif
parts list for 1540008-02 circuit board(long board)
1541-33b-announce.gif
update announcement for the 1541B
1541-33b-chips.gif
parts list for 1541B board #250448
1541-33b-left.gif
left part of page 33b, parts layout for 1541B board #250448
1541-33b-right.gif
right part of page 33b, schematic for 1541B board #250448
1541-34.gif
parts layout for 1540008-02 circuit board(long board)
1541-35.gif
schematic for 1540008-02 circuit board(long board)
1541-36.gif
1541-37.gif
1541-38.gif
parts list for power supply
1541-39.gif
assembly of power supply
1541-40.gif
notice for common failure symptom: drive runs continuously
1551/
Here is the schematic diagram of the Commodore 1551 disk drive.
251860.gif
Schematic diagram, revision 4
1571/
Here is the schematic diagram of the Commodore 1571 floppy disk drive. The schematic also applies to the built-in 1571 in the Commodore 128D to some extent, but not to the 1571CR, which is integrated on the motherboard of the Commodore 128DCR. You can find those diagrams among the Commodore 128 schematics.
310420-full.gif
1571 PCB assembly #310420 schematic diagram, combined in one two-color image of 9625×6503 pixels.
310420.gif
1571 PCB assembly #310420 schematic diagram. This image was combined from the 8 parts c1571-{bot,top}-{1,2}.gif, and it has only two colours instead of the original 16. Resolution: 4812×3251 pixels.
c1571-bot-1.gif
c1571-bot-2.gif
c1571-bot-3.gif
c1571-bot-4.gif
Bottom half of the C1571 schematics (1 is the rightmost picture, 4 the leftmost)
c1571-layout.gif
The component layout diagram for the C1571 drive.
c1571-top-1.gif
c1571-top-2.gif
c1571-top-3.gif
c1571-top-4.gif
Top half of the C1571 schematics (1 is the rightmost picture, 4 the leftmost)
memorymap.txt
1570/1571 and 1571CR (C128DCR) memory map, composed by William Levak.
parts.txt
1570/1571 and 1571CR (C128DCR) drive parts list, composed by William Levak.
readme-1571cr.txt
Differences between the 1571 and the 1571CR found in the 128DCR.
1581/
Service Manual, 1581, 3.5" Disk Drive, June 1987 PN-314982-01
1581--title.gif
title page
1581-00.gif
contents
1581-01.gif
1581-02.gif
1581-03.gif
1581-04.gif
specifications
1581-05.gif
1581-06.gif
6502 microprocessor
1581-07.gif
1581-08.gif
8520A CIA
1581-09.gif
1581-10.gif
1581-11.gif
WD1770 FDC
1581-12.gif
parts list
1581-13.gif
assembly drawing
1581-14.gif
board layout #250471
1581-15.gif
1581-16.gif
1581-17.gif
1581-18.gif
schematic #252380 rev. 4
parts.txt
1581 parts list, composed by William Levak.
powersupply.gif
Reverse-engineered schematic diagram of the 110-volt 1581 and 1541-II power supply. Created and uploaded by William Levak <wlevak@cyberspace.org>. According to him, you have to break the case open to get inside. Jameco sells a case that can be used to replace it.
old/
Here are schematic diagrams of old Commodore disk drives (with IEEE-488 interface)
1001/
The SFD-1001 is a single floppy drive equipped with CBM DOS 2.7.
parts.txt
SFD-1001 parts list, composed by William Levak.
2031/
This is from a copy of the manual. The original had a number of double fold-out sheets that had no apparent need for this format, so I made them two separate pages when I coppied them. I have done the same thing here but have numbered the pages "l"(left) and "r"(right) to preserve the original pagination.
contents.gif
Table of contents
page-1.gif
2031 Disk Drive Product Specification.
page-10.gif
2031 HP Upgrade Notes
page-11l.gif
2031 HP Circuit Theory
page-11r.gif
2031 schematic diagram #2031038, sheet 1 of 4
page-12l.gif
2031 HP Circuit Theory
page-12r.gif
2031 schematic diagram #2031038, sheet 2 of 4
page-13l.gif
2031 HP Circuit Theory
page-13r.gif
2031 schematic diagram #2031038, sheet 3 of 4
page-14l.gif
2031 HP Circuit Theory
page-14r.gif
2031 schematic diagram #2031038, sheet 4 of 4
page-15l.gif
page-15r.gif
2031 HP Power Supp;y
page-16l.gif
Parts List 95055000 Shugart Drive Assembly
page-16r.gif
Shugart Drive Assembly 2031HP/2040/4040
page-17.gif
Resistance Checks High Profile - Shugart Drive
page-18l.gif
Parts list shugart board
page-18r.gif
Shugart Servo Board (Commodore part #31414701)
page-19.gif
page-2.gif
Block Diagram
page-20.gif
page-21.gif
page-22.gif
page-23.gif
page-24.gif
page-25.gif
page-26.gif
page-27.gif
page-28.gif
2031 LP Circuit Theory
page-29.gif
Parts List PCB Assembly #1540033
page-3.gif
Care and Maintenance
Device Number Change
page-30l.gif
PCB Assembly #1540033 Board Layout
page-30r.gif
Schematic 1540039
page-31l.gif
page-31r.gif
1540/41/2031 LP Power Supply (also similar to the SFD-1001)
page-32.gif
Resistance Checks Low Profile - Alps Drive
page-33l.gif
Parts List Alps Drive
page-33r.gif
Alps Drive Assemblies 1540/41/2031 LP
page-34.gif
Alps Motor Control Board Schematic
page-4.gif
Overview
Flash Code
page-5.gif
Casework/Accessory Parts List
page-6.gif
page-7.gif
Troubleshooting Guide
page-8.gif
PCB Assembly #2031040 Board Layout
page-9.gif
Parts List PCB Assembly #2031040-01
page-title.gif
Title page. Service Manual, 2031 Disk Drive, High and Low Profile, Dec. 1985 PN-314011-01.
parts.txt
2031 parts list, composed by William Levak.
4040/
The Commodore 2040/3040/4040 floppy disk drive
320806-1.gif
320806-2.gif
320806-3.gif
digital circuit board schematics
320806-layout.gif
digital circuit board parts layout
320816-layout.gif
analog circuit board parts layout
320816.gif
analog circuit board schematic
parts.txt
2040/3040/4040 parts list, composed by William Levak.
shugart-1.gif
drive mechanism parts list
shugart-2.gif
drive mechanism parts layout
8050/
Service Manual 8050 - 8250 Dual Disk Drives, June 1985, PN-314011-03
This manual contained many triple width fold out pages. Most had a wide enough margin so that they could be scanned as a double width page. Those that could not are designated with a "l" for left and "r" for right parts of the page. All but page 13 could be split so that no information was cut in two by the split.
8050--title.gif
Title page
8050-00.gif
Contents
8050-01.gif
Specifications
8050-02.gif
PCB, ROM and drive identification.
8050-03.gif
accessory parts
8050-04.gif
device number
8050-05.gif
Care and Maintenance / Power Up Diagnostic Codes
8050-06.gif
8050-07.gif
troubleshooting guide
8050-08.gif
Board Layout for Micropolis analog board 8050006
8050-09.gif
parts list for Micropolis analog board 8050006
8050-10.gif
8050-11.gif
8050-12.gif
schematics for Micropolis analog board 805006
8050-13l.gif
8050-13r.gif
board layout for Tandon analog board 8050044
8050-14.gif
parts list for Tandon analog board 8050044
8050-15.gif
8050-16.gif
8050-17.gif
schematics for Tandon analog board 8050044
8050-18.gif
parts layout for MPI analog board 8250023
8050-19.gif
parts list for MPI analog board 8250023
8050-20.gif
8050-21.gif
8050-22.gif
schematics for MPI analog board 8250023
8050-23.gif
board layout for digital board 8050002
8050-24.gif
parts list for digital board 8050002
8050-25.gif
8050-26.gif
8050-27.gif
schematics for digital board 8050002
8050-28.gif
power supply assembly 8050029
8050-29.gif
resistance checks Micropolis and Micropolis Safari drives
8050-30l.gif
8050-30r.gif
Micropolis drive assemblies 8050/8250
8050-31l.gif
8050-31r.gif
Micropolis Safari drive assemblies 8050/8250
8050-32.gif
resistance checks Tandon drives
8050-33l.gif
8050-33r.gif
Tandon drive assemblies 8050/8250
8050-34.gif
resistance checks MPI drives
8050-35l.gif
8050-35r.gif
MPI drive assemblies 8050/8250
8050-36.gif
schematic for MPI servo 314227-01
parts.txt
8050/8250 parts list, composed by William Levak.
9090/
Commodore Hard Disk Drive Technical Manual, Model 9060/9090, P/N 990441
00.gif
Cover page
01.gif
02.gif
03.gif
04.gif
05.gif
06.gif
07.gif
08.gif
09.gif
10.gif
11.gif
12.gif
13.gif
14.gif
15.gif
16.gif
17.gif
18.gif
19.gif
20.gif
21.gif
22.gif
23.gif
24.gif
25.gif
26.gif
27.gif
28.gif
29.gif
Text pages
a1.gif
Appendix 1: Major subassemblies
a2.gif
Appendix 2: Recommended Spare Parts List
a3.gif
Appendix 3: Index of schematic diagrams
i.gif
Table of Contents, page i
ii.gif
Table of Contents (cont.), page ii
iii.gif
Illustrations (Figures and Tables), page iii
parts.txt
9060/9090 parts list, composed by William Levak.
schematics/
187040-001-1of2.gif
187040-001-2of2.gif
TM600 Control and Data Schematic
187045-001.gif
TM600 Control and Data PCB Assembly
187065-001-3of3.gif
TM600 Spindle Control PCB Assembly
188008-001-1of7.gif
188008-001-2of7.gif
188008-001-3of7.gif
188008-001-4of7.gif
188008-001-5of7.gif
188008-001-6of7.gif
188008-001-7of7.gif
Disk Drive Controller Schematic
188008-001-assy.gif
Disk Drive Controller PCB Assembly
300010-002-1of3.gif
300010-002-2of3.gif
300010-002-3of3.gif
Winchester DOS/Controller Schematic
300013-002-1of3.gif
Winchester DOS/Controller PCB Assembly
300015-001-add.gif
Addendum to Drawing Number 300015-001, Fold Back Circuit
300015-001.gif
Power Supply Schematic
300018-001.gif
Power Supply PCB Assembly
300520-00x-1of2.gif
300520-00x-2of2.gif
Commodore Disk System Expanded View
kim-1/
The KIM-1 was a 6502 learning kit produced by MOS Technologies. These files were reconstructed by Ruud Baltissen.
README
Release notes
build.txt
Preliminary instructions for building a KIM-1
hardware-manual.txt
KIM-1 Hardware Manual
hardware-p125.gif
Schematic diagram for a single-instruction stepper for the KIM-1 (or any 6502 computer), from the Hardware Manual page 125.
kim-hints.txt
KIM-1 Frequently Asked Questions with answers
kim-rebuild.gif
A KIM-1 schematic diagram with solely standard components (so that you can build one yourself)
kim.asm
The source code of the KIM firmware
kim.gif
The KIM-1 schematic diagram, reverse engineered by Ruud Baltissen
kim.txt
Technical information about the KIM-1
user-manual.txt
KIM-1 User Manual
src@ (link)
misc/
1351-mouse.gif
The 1351 mouse schematic, drawn by Frank Kontros <jeno@kontr.uzhgorod.ua>. On the PCB there was the following text: ASSY 0101930 Rev.A.
iec-protocol.gif
A flow diagram of Commodore's IEC protocol.
printers/
1515.gif
VC-1515 printer, unknown revision
1520009.gif
VC-1520 printer/plotter, rev.A, assy number 1520009.
1525.gif
VC-1525 printer, unknown revision
1526.gif
VC-1526 printer, unknown revision

cbm-adm@lists.funet.fi