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Apparently the MRG ADB code becomes unstable if we handle via1 interrupts 

properly, so go back to unflagging them all before processing any via1
interrupts.  Perhaps this can be changed back when we get ADB code that
does not rely on the ROMs?
This commit is contained in:
briggs 1996-05-21 02:46:02 +00:00
parent 4139356a98
commit 057adea27d
1 changed files with 8 additions and 2 deletions
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10
sys/arch/mac68k/mac68k/via.c
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@ -1,4 +1,4 @@
/* $NetBSD: via.c,v 1.42 1996/05/21 00:04:18 briggs Exp $ */
/* $NetBSD: via.c,v 1.43 1996/05/21 02:46:02 briggs Exp $ */
/*-
* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
@ -185,13 +185,19 @@ via1_intr(fp)
if (intbits == 0)
return;
/*
* Unflag interrupts here. If we do it after each interrupt,
* the MRG ADB hangs up.
*/
via_reg(VIA1, vIFR) = intbits;
mask = (unsigned char) 1;
bitnum = 0;
do {
if (intbits & mask) {
via1itab[bitnum]((void *)((int) bitnum));
via_reg(VIA1, vIFR) = mask;
/* via_reg(VIA1, vIFR) = mask; */
}
mask <<= 1;
} while (intbits >= mask && ++bitnum < 7);