Last revision of this page: February 2, 2025

• Tim Patterson: All Those Floppy Disk Formats ...
• Vernon Brooks: History of DOS

• Gaby Chaudry: Gabys Homepage for CP/M and Computer History

Information

• minuszerodegrees.net: IBM 51xx PC Family Computers (en)
• Roman Ondrejka: IBM PC Collector (sk)
• Vernon Brooks: PC DOS Retro
• Vernon Brooks: IBM PC/XT/AT/286 BIOS Source Code Reconstruction

Video

• An IBM internal training video (1984): PC AT Introduction and Service Training (1984) (en)
• A Brand NEW IBM PC AT: Unboxing and Setup (2017) (en)

Information

• Herb Johnson: How to read and write old floppy disks (en)
• Dave Dunfield: Daves Old Computers - Disk/Software Image Archive (en)
• John Wilson (D bit): ersatz11 - PDP-11 Emulation System / FDADAP floppy disk adapter (en)
• Malcolm Macleod: avitech.com.au - Floppy Disk Imaging (en)

Video

• Video: QumeTrak 842 in real mode on the PC: QumeTrak 842 8 inch Floppy Drive DS/DD WORKING (en)

• Fabian Günther-Borstel: AmoRetro.de
• Frank Rahman: Kaypro Journal

Sydex

Here is an interesting correspondence from 2005 between Herb Johnson and Charles Guzis (Chuck(G) at VCF) regarding the software products of Sydex. Sydex has distributed the products 22DISK, Teledisk, AnaDisk and 22NICE. Since 1989 it is no longer possible to purchase a registered version of 22DISK with the complete CP/M definition list. Unfortunately, the shareware versions only contain a shortened list.

But, ... once in, always in! The list can still be found on the internet. For example, in the Don Maslin archive. The original list cpmdisks.def has a size of 83, 85 or 87 KB! The shareware list is only 35 KB in size.

Don Maslin

The large Don Maslin tape collection.

I can recommend the „software archaeologists“ among you to take a close look at this archive. You will find some very special DOS software treasures. Believe me!

• archive.org: The Don Maslin Archive
• *HUMONGOUS* CP/M Software Archives: The Don Maslin Archive.