Phase locking the VDC to the VIC Chip - Short Version

The PLL tower that saved CES - Short Version


HMOS II Designer Guide


The binder is empty but at one time it contained the secrets to cooking up a batch of HMOSII chips.


Commodore C64 PLA Die

An Outsanding Paper: "The C64 PLA Dissected"

An Excellent write-up on the Programmable Logic Array (PLA)  by Thomas 'skoe' Giesel.  This PLA is found in t

Vintage Gamma spectrometry system based on C128D

Vintage Gamma spectrometry system based on C128D

Here is an amazing Gamma Spectrometry System based on C128D posted by one of the users on, Tomislav Plese.  Here Tomislavm who goes by Tomy, shows some Tokyo soil samples taken since  Fuki

Commodore Colors

 From an article by Philip "Pepto" Timmermann

Schematics for C64 Plus with 80 Columns

Schematics for C64 Plus with 80 Columns

More schematics from 30 years ago.  This is for a computer known internally as the C64+ or C64 Plus and has built in 80 column support.  Unfortunately there is a page missing.

DLH's Commodore Archive

DLH's Commodore Archive



DLHs Commodore Logos.jpg

CB< Commodore, TED, C116, C264, Plus-4, Bil Herd, Dave Haynie, Terry Ryan, Fred

TED Drawings from the 1980's




CBM, Commodore, Z-80, CPM, C-64, VIC-40

CPM Z80 Cartridge for the Commodore VIC-40

More of those sets of drawings that I found in a box dating back 30 years to when I worked at Commodore Business Machines in West Chester PA.