- A blast from the past: Disassembling DOS (softwarelitigationconsulting.com)
from Undocumented DOS: A Programmer’s Guide to Reserved MS-DOS Functions and Data Structures (2nd edition, 1994. Copyright (c) Andrew Schulman 1994-2020. All rights reserved. [This nearly-ancient text (along with others from Undocumented DOS and Undocumented Windows) is being presented as a case study in some methodologies of software reverse engineering, applied to mass-market software. Note that this chapter appeared in the 2nd edition of the book, not in the 1st edition.]
- Microsoft MS-DOS 3.20 (pcjs.com)
The MS-DOS 3.20 disks in the PCjs collection are the only known non-OEM copies of that release available online. All other known MS-DOS 3.20 disk images are OEM releases (eg, HP, Zenith, Data General, Seiko Epson, etc.) and can be found on sites like WinWorld.
- Microsoft MS-DOS 5.00 (pcjs.com)
IBM PC AT (8Mhz), 1Mb RAM, 20Mb Hard Disk (Formatted), IBM EGA (128Kb)
- Microsoft MS-DOS 6.22 (pcjs.com)
IBM PC AT, 640Kb RAM, 47Mb Hard Disk, IBM EGA (128Kb)
- Campeche (Wikipedia)
Campeche, officially the Free and Sovereign State of Campeche, is one of the 31 states which, with Mexico City, make up the 32 federal entities of Mexico. Located in southeast Mexico, it is bordered by the states of Tabasco to the southwest, Yucatán to the northeast, Quintana Roo to the east, by the Petén department of Guatemala to the south, and by the Orange Walk District of Belize to the southeast. It has a coastline to the west with the Gulf of Mexico. The state capital, also called Campeche, was declared a World Heritage Site in 1997. The formation of the state began with the city, which was founded in 1540 as the Spanish began the conquest of the Yucatán Peninsula. The city was a rich and important port during the colonial period, but declined after Mexico’s independence. Campeche was part of the province of Yucatán, but split off in the mid-19th century, mostly due to political friction with the city of Mérida. Much of the state’s recent economic revival is due to the discovery of petroleum offshore in the 1970s, which has made the coastal cities of Campeche and Ciudad del Carmen important economic centers. The state has important Mayan and colonial sites; however, these are not as well-known or visited as much as others in the Yucatán.
- MS-DOS (Wikipedia)
MS-DOS (/ˌɛmˌɛsˈdɒs/ em-es-DOSS; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and a few operating systems attempting to be compatible with MS-DOS, are sometimes referred to as “DOS” (which is also the generic acronym for disk operating system). MS-DOS was the main operating system for IBM PC compatibles during the 1980s, from which point it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system.