VIC20 computer,
early version, revision E
VIC20 computer,
later cost reduced (CR) versions
C64 this diagram
is typical, but there are several versions. Included are pics of the computer
saver, heat sinks, etc.
Computer
saver circuit you can build for the C64, diagram and instructions, protects
from failing power supply.
C64C computer,
cost reduced version of the C64.
SX64 portable
computer & drive. (includes modification to install computer reset
without drilling cabinet)
C16 computer
C116 computer
C128 computer
C128DCR computer,
USA version (metal case), internal 1571, internal power supply.
1541
(aka 1540) disk drive, 5.25", early version, long board (example: 1540008),
Alps (push down) mechanism
1541
disk drive, 5.25", (boards 1540049, 50, etc.), mostly Alps mechanism.
1541
(aka 1542) disk drive, 5.25", later version, (boards 251777, 251830, etc.),
mostly Newtronics mechanism.
1541C
(aka 1541B) disk drive, 5.25", short board, Newtronics mechanism.
1541-II
disk drive, 5.25", external power supply.
1551
disk drive, 5.25", internal power supply.
1571
5.25" disk drive, double sided, GCR and MFM encoding, internal power supply.
1581 3.5" disk
drive, double sided, MFM encoding, external power supply.
FSD-1 single
5.25" floppy drive (1541 clone), internal power supply. I don't have schematic.
MSD-SD2 (dual)
and SD1 (single) 5.25" single sided floppy drive, internal power supply.
Includes MSD disk images.
SFD-1001
disk drive.
MPS802 / CBM1526 printer (no schematics)
1701 monitor -
NTSC - (JVC chassis, like the 1702 but with large, heavy power transformer)
1702 monitor
- NTSC - hand-drawn schematic of JVC CM42782-001 (chassis different than
the 1701).
1802 monitor
- NTSC (Daewoo CM-120)
1802-clone
monitor - NTSC (Goldstar CMC-141-1)
1080 Toshiba
monitor (don't have schematic, but this information may help in troubleshooting)
.
1084 PAL1
monitor - European PAL and RGBI, with SCART connector
1084 PAL2
monitor - another European PAL and RGBI, with SCART connector, Philips
CM8833 chassis.
1084P (aka 1084S-P)
monitor. Two similar chassis shown. NTSC and RGBI (USA version by Philips).
1084D and
S-D monitor - NTSC video and RGBI (USA version made by Daewoo).
1902 (non-A)
monitor (don't have schematic, but the CBM 2002 chassis is a close match
for NTSC models).
1902A monitor
- NTSC video and RGBI (USA version, similar to a 1084).
1950 monitor,
VGA for IBM type PCs.
2002 monitor
- NTSC video, digital and analog RGB for Amiga. (use this for the 1902
non-A versions).
Adapters and
instructions: how to make a C64 PLA substitute using a standard 64K EPROM.
Adapter
to read a 2332 (BASIC & CHAR ROMs) as a standard 2732 in an EPROM burner.
Adapter:
use a standard 2732 EPROM to replace a 2332 PROM.
Adapter
to read a 2364 (Kernal ROM in C64) as a standard 2764 in an EPROM burner.
Adapter:
use a standard 2764 EPROM to replace the 2364 PROM Kernal in a C64, 1541
DOS IC, etc.
Adapter:
use a 27128 EPROM for a dual C64 Kernal or 1541 DOS, with a switch to change
"banks".
Adapter:
use a 27256 EPROM for a dual C128 Kernal, with a switch to change "banks".
Adapter:
use a 27512 EPROM for dual C128DCR Kernal, with a switch to change "banks".
Adapter:
to replace the SX Kernal & DOS ROMs with standard 2764 EPROMs.
Misc. photos
of Commodore equipment, diagnostic screens, etc.
Diagnostic
cartridges for the C64 and VIC20 (photos only).
PROMOS 2.0:
software and instructions, used with Jason-Ranheim Prominade EPROM burner.
How to pack electronic
hardware for shipping to prevent damage in transit.
Commodore repair articles can be found here
and on my home website.
For help in troubleshooting, email: rcarlsen at tds dot net
or rrcc at u dot washington dot edu
B-2-56 is a link to my collection of photos of my military experience in Europe from 1965 to 1967.
