In MS-DOS, the interfaces and levels of functionality are not well separated. For instance, application programs are able to access the basic I/O routines to write directly to the display and disk drives. Such freedom leaves MS-DOS vulnerable to errant (or malicious) programs, causing entire system crashes when user programs fail. Of course, MS-DOS was also limited by the hardware of its era. Because the Intel 8088 for which it was written provides no dual mode and no hardware protection, the designers of MS-DOS had no choice but to leave the base hardware accessible
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- owner: miller - (no access) - Abraham Silberschatz_ Peter B Galvin_ Greg Gagne -Operating system concepts-Wiley (2012).pdf, p102
- owner: hughleat - (no access) - Abraham-Silberschatz-Operating-System-Concepts---9th2012.12.pdf, p102
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