Date   : Sat, 08 Sep 1990 15:44:00 GMT
From   : astroatc!nicmad!madnix!deety!rat@speedy.wisc.edu (David Douthitt)
Subject: CP/M Books

My personal favorite is "The Programmer's CP/M Handbook", by
Andy Johnson-Laird.  Not only is he very knowledgeable about
CP/M, but my understanding is that DR licensed their source code
to him for development.  He's a licensed DR developer.

The book has these chapters:

    1. Introduction
    2. The Structure of CP/M
    3. The CP/M File System
    4. The Console Command Processor (CCP)
    5. The BASIC Disk Operating System
    6. The BASIC Input/Output System
    7. Building a New CP/M System
    8. Writing an Enhanced BIOS
    9. Dealing with Hardware Errors
   10. Debugging a New CP/M System
   11. Additional Utility Programs
   12. Error Messages

Another good book, which doesn't get as deep into CP/M as Andy's book,
is "Mastering CP/M", by Alan R. Miller (published by Sybex) (by the way,
Andy's book is published by Osborne-McGrawHill.).  Alan's book puts more
emphasis on writing for CP/M, using macro assemblers like M80.

Here are the chapters:

    1. CP/M Organization and Operation
    2. Duplicating and Altering CP/M Disks
    3. Adding Features to BIOS
    4. Building a Macro Library
    5. Using BDOS for Nondisk Operations
    6. Reading Disk Files With BDOS
    7. Writing Disk Files With BDOS
    8. The CP/M Directory

Hope this whets your appetite.  Good reading to ya!