The 8259 interrupt controller (HELP!)

William E. Davidsen Jr davidsen at steinmetz.ge.com
Fri May 20 00:17:59 AEST 1988


I don't have the info right here, but I did this, here's where to find
out how.
	IBM AT tech ref (or XT):
	  section on the serial interface:
	    tells how to set the USART
	  section on the motherboard:
	    how to program the 8259 (just clear a bit in the imask,
	    DON'T lose the values of the other bits)
	    There's a 1 bit output to enable serial ints on the MB
	Intel 8259 spec sheet:
	  How to use the beast, don't forget EOI, don't change
	  the rest of the settings or DOS won't work
-- 
	bill davidsen		(wedu at ge-crd.arpa)
  {uunet | philabs | seismo}!steinmetz!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me



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