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-rw-r--r--sys/src/9/pc/sdide.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/9/pc/sdide.c b/sys/src/9/pc/sdide.c
index 2b2918792..b9b237c57 100644
--- a/sys/src/9/pc/sdide.c
+++ b/sys/src/9/pc/sdide.c
@@ -2160,7 +2160,7 @@ atapnp(void)
ctlr->maxdma = maxdma;
ctlr->span = span;
ctlr->irqack = irqack;
- if(pi & 0x80)
+ if((pi & 0x80) && (p->mem[4].bar & 0x01))
ctlr->bmiba = (p->mem[4].bar & ~0x01) + channel*8;
if(head != nil)
tail->next = sdev;