/joh'liks/ n.,adj. 386BSD
Started open source UNIX.
Appeared in part as a 17 article magazine series in 1991-1992.
Documented the "how, what, why, who, when" of porting BSD to the 386.
Done while BSD was becoming "open source".
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segmented architecture: Porting Unix to the 386: Three Initial PC UtilitiesThe second article in the "PORTING UNIX TO THE 386" series discussed the utilities we had to build to test the port on an actual 80386 PC. Choosing how far to go in supporting X86 architecture in order to get a basic BSD UNIX system to be able to bootstrap the futre efforts. 386 Memory Management VitalsMost popular microprocessors use either segmentation or paging to manage memory address space access. The 386 is rare in that it possesses both. In fact, since segmentation, (see Figure 3(a)), is placed on top of paging (see Figure 3(b)), you are expected to use segmentation in some form any time memory is paged. And, most important, BSD relies on paging. |