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B.15 0A0EH: TELCLOCK6 (TELECOM CLOCK OPTION)
Address
Action
UNLOCK10 UNLOCK01 HLDOVR10 HLDOVR01
READ
0xA0E
WRITE
Reset
PRI01
Bit PRI_LOS in register TelClock2 switched from 0 to 1.
PRI10
Bit PRI_LOS in register TelClock2 switched from 1 to 0.
SEC01
Bit SEC_LOS in register TelClock2 switched from 0 to 1.
SEC10
Bit SEC_LOS in register TelClock2 switched from 1 to 0.
HLDOVR01
Bit HOLDOVER in register TelClock2 switched from 0 to 1.
HLDOVR10
Bit HOLDOVER in register TelClock2 switched from 1 to 0.
UNLOCK01
Bit UNLOCK in register TelClock2 switched from 0 to 1.
UNLOCK10
Bit UNLOCK in register TelClock2 switched from 1 to 0.
This register reports changes since the last time it was read. A legacy ISA interrupt will be
generated when any of those bits are set. The actual interrupt used is assigned by the BIOS at
boot time and can be read from register TelClock7.
The action of reading this register will clear all bits that were '1' prior to the reading. Bits
that turned to '1' during of after the reading will not be affected.
B.16 0A0FH: TELCLOCK7 (TELECOM CLOCK OPTION)
Address
Action
READ
0xA0F
WRITE
Reset
The content of this register is the number of the legacy ISA interrupt used for events (see
register TelClock6). It is initialized at boot time by the BIOS.
The interrupt is acknowledged by a read of TelClock6 register. Always perform a read to this
register before enabling the interrupt in the chipset to get rid of any pending interrupt.
Note that a value of 2 will hook the interrupt to an SMI.
D7
D6
D5
NU
NU
NU
X
X
X
D7
D6
D5
NU
NU
NU
NU
NU
NU
X
X
X
D4
D3
SEC10
SEC01
NU
NU
X
X
D4
D3
NU
Interrupt Number
NU
Interrupt Number
X
B-2
D2
D1
D0
PRI10
PRI01
NU
NU
NU
X
X
X
D2
D1
D0
0101b
AT8001 User's Guide
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