Tableless version

Directories in /pub/cbm/schematics/computers/vic20/
The VIC-20 and the VIC-20CR
../ [Parent directory]
cartridges@ Commodore VIC-20 cartridges
drives@ Disk drives
firmware@ System firmware

Files in /pub/cbm/schematics/computers/vic20/
DateSizeFilenameDescription
1996-05-08 130771 251027l1.gif
1996-05-08 173902 251027l2.gif
1996-05-08 103747 251027l3.gif
1996-05-08 146612 251027r1.gif
1996-05-08 165161 251027r2.gif
1996-05-08 136724 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.
1996-05-08 177837 324001_1.gif
1996-05-08 194380 324001_2.gif
1996-05-08 170958 324001_3.gif VC-20 rev.B (PAL, old design). Assy number 324001-03. Bad scanning quality.
1995-04-23 244980 vic20-left.tiff
1995-04-23 252038 vic20-middle.tiff
1995-04-23 168022 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.
1996-05-08 37570 vic20bus.gif A block diagram of the VIC-20 bus signals.
1996-05-08 111269 vic20mod.gif The VIC-20 RF modulator (PAL).

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