24 Nov
2002
24 Nov
'02
1:12 p.m.
It was thus said that the Great Tony Duell once stated:
Did you program it by writing to registers (using the 80x86 IN/OUT
instruction) or did it work like the 80x87, which extended the instruction
set?
-spc (Sounds interesting in any case ... )
What is the 8089 used for? Some sort of DMA or IO controller?
It was called an I/O processor. It was a _very_ fancy DMA controller --
more like a processor designed for moving data around, checking status
bits, and so on.