CP/M-86 1.10 [IBM PC]
Released in 1983 by Digital Research/IBM
For IBM PC computers

IMPORTANT: This version will not run on an "AT" class machine or
later.

IMPORTANT: This version will crap itself if a hard disk controller is
installed.

To run this version you must use an IBM PC or XT compatible with NO
hard drive controller installed. If you are using an emulator, you
must disable hard drive support.

This archive includes three 160k disk images in raw and ImageDisk
format.

Disk1: CP/M-86 V1.1 s/n 1024-0000-03178
Disk2: GSX 1 of 2 V1.1 s/n same
Disk3: GSX 2 of 2 V1.1 s/n same


What is unique about this version, compared to the PC & XT version:

This is for the IBM-PC, there isn't any hard disk support AFAICT.

The Bios INIT: entry is a few pages lower in memory.

The Boot Sector is different code, it is a one stage loader, it
expects CPM.SYS to be first in the disk directory, and first file on
the disk, and of a certain size.

There is an 'Easter Egg' banner in the boot code.  It is accessed by
pressing all of: Left-Shift, Right-shift, Ctrl, and Alt, at the same
time, as the system boots.  It is a message from Dean Ballard, that
he wrote the Bios.

[The PC&XT version has an easter egg as well, accessed by pressing
the R-shift and the question mark keys, as the system boots.  It too,
is a message from Dean Ballard, that he wrote 'much of the code'.
The PC&XT boot loader is a two stage loader, the 1st sector loads the
secondary loader found on Trk0 Sectors 5,6,7,8 into memory, this 2nd
then finds & loads CPM.SYS or CCPM.SYS]

This does not have the AT-Patch installed, meaning CP/M overwrites
many of the Page Zero interrupt vectors to an interrupt trap within 
itself, by design.  This is of no problem on a PC/XT, it is a problem 
on more recent processors.

I can boot this on an XT clone, if I remove the SCSI HD Controller
from the buss.  With a Seagate ST-01 installed, it loops reboot 
attempts.  With a Future Domain SCSI Controller, it locks up in the 
Banner Page.  Without either, it works fine.
