• 1541 Fixer - Problem diagnosisi tip sheet on repairing the 1541 disk drive, includes the most common symptoms of a ailing 1541 and the possible solutions to reair it. (some repairs may also apply to the PET/CBM 2031LP drive)
• CBM Hackers Maillist - Information on joingin the CBM Hackers Email List, a great discussion venue for die-hard Commodore Fans, especially active ones.
• Commodore 64 Fixer - A troubleshooting chart to help people diagnose and repair common Commodore 64 ailments.
• Commodore Disk Basics - A text on the basics of sending commands to a Commodore 8-bit disk drive like the PET/CBM drives and the Commodore 64/VIC/128/Plus-4/16 drives. Very useful for the new Commodore 8-bit owner.
• Commodore Loading Basics - Information of loacting and loading files from many Commodore 8-bit disk drives
• Commodore Troubleshooting - Some not-so commonly known troubleshooting tips for many of the Commodore 8-bit computers, for minor maladies that the manuals don't cover.
• Interfacing to Commodore 8-bits - Information and links to various cables and interfaces to connect and transfer data between Commodore 8-bits and other computers and the internet.

• 
  Character/Byte Multichart - An Adobe Acrobat Portable Document that lists various byte representations in Commodore 8-bit computers, Character Codes of PETASCII, Screen Code, true ASCII, 6502 ML, and BASIC Tokens for most of the 8-bit Commodores. As one person put it, "a Commodore Rosetta Stone."
• 40 Column Character Maps - Two 40x25 grids to help Commodore 8-bit programmers plan screen displays. One in decimal notation, the other in hexadecimal for ML programmers. (includes common Commodore screen start locations.)

Other Good Commodore Information Links:

• Commodore Knowledge Base - Searchable database of Commodore Knowldge compiled by Cameron Kaiser
• the Complete Commodore Innerspace Anthology - the ultimate 8-bit Commodore Reference, memory maps, chip registers, pinouts, ascii charts, kernel entry points, etc. and indispensable reference for the Commodore 8-bit programmer. Scanned and on-line at funet.fi.
  • If you are interested in getting a printed copy - worth the price for serious Commodore devotees, email the author, Karl Hildon.
• comp.sys.cbm Newsgroup - The largest open Commodore 8-bit fourm found on the internet.
• Groups.Google.Com - If you don't have usenet capability to get to comp.sys.cbm, or want to read usenet postings as far back as 1982, this is the place to go!
• CBM Hacker's Mail List For anyone interested in the down and dirty technical aspects (programming/hardware) of the Commodore 8-Bit computer line, this mail group is for you!
• Project 64 - On-Line documentation project for the Commodore 64 and other 8-bits, many game and hardware manuals are already on-line!
• iDoc - Similar to project 64, supporting documentation in languages other than english (as well as english)
• http://www.funet.fi/pub/cbm/ An FTP site that has PET files/information available!
• http://home.att.net/~wards.game.history/vic20/ Commodore VIC-20 Information Site - The best starting point for VIC-20 fans.
• http://www.hardwarebook.net/ The Hardware Book has pinouts for just about every interface (recently fixed link!).