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Set ICUs to read IRR by default.

This commit is contained in:
mycroft 1994-04-28 08:28:35 +00:00
parent 39718a43cc
commit 2ff4b1435c
1 changed files with 3 additions and 1 deletions
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4
sys/arch/i386/isa/intr.c
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@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
* $Id: intr.c,v 1.19 1994/04/25 22:12:14 mycroft Exp $
* $Id: intr.c,v 1.20 1994/04/28 08:28:35 mycroft Exp $
*/
#include <sys/param.h>
@ -86,6 +86,7 @@ isa_defaultirq()
#endif
outb(IO_ICU1+1, 0xff); /* leave interrupts masked */
outb(IO_ICU1, 0x68); /* special mask mode (if available) */
outb(IO_ICU1, 0x0a); /* Read IRR by default. */
#ifdef REORDER_IRQ
outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
#endif
@ -100,6 +101,7 @@ isa_defaultirq()
#endif
outb(IO_ICU2+1, 0xff); /* leave interrupts masked */
outb(IO_ICU2, 0x68); /* special mask mode (if available) */
outb(IO_ICU2, 0x0a); /* Read IRR by default. */
splhigh();
enable_intr();