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-rw-r--r--sys/dev/sio/sio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c
index b3d8d21..f5e7363 100644
--- a/sys/dev/sio/sio.c
+++ b/sys/dev/sio/sio.c
@@ -730,7 +730,7 @@ sioprobe(dev, xrid, rclk, noprobe)
/* EXTRA DELAY? */
failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS;
failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY;
- failures[2] = sio_getreg(com, com_mcr) - mcr_image;
+ failures[2] = (sio_getreg(com, com_mcr) & 0x7f) - mcr_image;
DELAY(10000); /* Some internal modems need this time */
irqmap[1] = isa_irq_pending();
failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY;
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