Idrewoods Technology Relics: IBM PC-DOS 1.00

Hello Guys,

My first post on emulating the DOS, would be using IBM Personal Computer DOS version 1.00 which was released by IBM in the year 1981.

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The history says that,

IBM® Personal Computer™ DOS 1.00 was a result of the vision and efforts of many different people; including various employees of both IBM® and Microsoft®. Some would say that DOS owes a great deal more to the creator of CP/M (Gary Kildall) than either IBM® or Microsoft® would ever admit to. If you want an honest assessment, I suggest you find a group of disinterested assembly programmers to compare the code from CP/M and DOS rather than relying on Net rummors! Most would say the majority of the initial work had been accomplished by Tim Paterson, who created much of the system code while employed at Seattle Computer Products where he wrote QDOS (Quick and Dirty Operating System). Bill Gates and Marc McDonald, however, actually invented the File Allocation Table (FAT) file system for Microsoft's standalone BASIC in 1977 which Paterson later used to store and work with files under QDOS.

Apart from the DOS system code, Paterson also produced two system utilities that found their way onto IBM's diskette, the most notable being DEBUG. After Microsoft® acquired the rights to sell what was then called 86-DOS, Paterson joined that company in order to help complete their 'secret project' for IBM® (i.e., Personal Computer™ DOS 1.00). At least one other Microsoft employee, Robert O'Rear (whose name is embedded in the Boot Sector), spent a great deal of time on this project as well. There were a number of IBM employees who worked on hardware interface code, wrote applications software for the operating system and spent time testing each change made along the way (some of their names are embedded in various BASIC and system programs on the diskette).

Of the 40 files on this diskette, 38 of them can be listed using the operating system's DIR command; they all had the same date: 08-04-81. However, the two Hidden System files have different dates: The earliest file on the disk, IBMBIO.COM, was dated July 23, 1981, and latest one, IBMDOS.COM, had a date of August 13, 1981.

This information was taken from Daniel B. Sedory (Thank you!), if you need more information please read at:
http://thestarman.pcministry.com/DOS/ibm100/

Enough the history, I was able to secure a copy through ***** from ***** and after doing MD5 checksum, the result is: 73c919cecadf002a7124b7e8bfe3b5ba which has the same result as Daniel B. Sedory (http://thestarman.pcministry.com/DOS/ibm100/Exam.htm)

Let have a look from some screen capture, I made through BOCHS.