device driver:Porting Unix to the 386: Designing the Software Specification
This, the first article, is the first published mention of 386BSD. By this time, the project had been operational for 18 months, and William Jolitz was at Berkeley working on the Net/2 release.
Originally the test framework to prove kernel parts work in the environment of an protected mode program running on the "raw" machine, this became the bootstrap environment to later load and start the kernel in system operation.Interrupt Handling
We coded specialized trap handlers for interrupt traps, as these were initimate with the systems interrupt control hardware, not part of the processor.