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OS Structures -------------------------------------- …
OS Structures -------------------------------------- Organisational Principles
SIMPLE
example
MS-DOS
written on Intel 8088, which X provide dual mode or any hardware protection
access
base hardware can be accessed by all things above
:check:
not v well defined structure
:red_cross:
vulnerable
first
components/parts
Resident System PRograms
Device Drivers
Application Programs
ROM BIOS device drivers
MICROKERNEL
LAYERED
MONOLITHIC
:check:
:red_cross:
implementation + maintenance difficult
too many funcitonalities packed into 1 level
all OS components in kernel
simpler, limited
examples
MODULAR
