82C862 Datasheet, PDF (44/51 Pages) List of Unclassifed Manufacturers – FireLink USB Dual Controller Quad Port USB

FireLink USB
82C862
7
6
5
4
3
2
1
0
Reserved
MEMOFST 104h
HceInput Register - Bytes 0
Input Data:
- I/O data that is written to Ports 60h and 64h is captured in this register.
Note: Refer to Table 4-4, "Emulated Registers and Side Effects", if emulation is enabled.
MEMOFST 105h-107h
HceInput Register - Bytes 1-3
Reserved
MEMOFST 108h
HceOutput Register - Bytes 0
Output Data:
- This register hosts data that is returned when an I/O read of Port 60h is performed by application software.
Note: Refer to Table 4-4, "Emulated Registers and Side Effects", if emulation is enabled.)
MEMOFST 109h-10Bh
HceOutput Register - Bytes 1-3
Reserved
Default = 00h
Default = 00h
Default = 00h
Default = 00h
MEMOFST 10Ch
HceStatus Register - Byte 0
Default = 00h
Parity
Indicates parity
error on
keyboard/mous
e data.
Time-out
Aux Output
Used to indicate
Full
a time-out
Assert IRQ12 if
Output Full bit
(MEMOFST
10Ch[0]) = 1
and IRQEn bit
(MEMOFST
100h[3]) = 1?
0 = No
1 = Yes
Inhibit Switch
Cmd Data
Reflects state of HC sets this bit
the keyboard on I/O writes to
inhibit switch: Ports 60h and
0 = Inhibited
64h:
1 = Not
0 = Port 60h
inhibited
1 = Port 64h
Flag
Input Full
Output Full
Nominally used
as a system
flag by software
to indicate a
warm or cold
boot.
HC sets this bit
to 1 on an I/O
write to Port
60h or 64h
except for the
case of a
GateA20
Sequence.
While set to 1
and emulation
is enabled
(MEMOFST
100h[0] = 1), an
emulation
interrupt
condition exists.
HC sets this bit
to 0 on a read
of Port 60h.
While this bit is
0 and the
Character
Pending bit
(MEMOFST
100h[2]) = 1, an
emulation
interrupt
condition exists.
Setting this bit
to 1 will
generate either
IRQ1 or IRQ12
under certain
conditions(1).
(1) If the IRQEn bit (MEMOFST 100h[3]) = 1 and Aux Output Full bit (MEMOFST 10Ch[5]) = 0: IRQ1 is generated.
If the IRQEn bit (MEMOFST 100h[3]) = 1 and Aux Output Full bit (MEMOFST 10Ch[5]) = 1: IRQ12 is generated.
Note: Refer to Table 4-4, "Emulated Registers and Side Effects", on page 18 if emulation is enabled.
MEMOFST 10Dh-10Fh
HceStatus Register - Bytes 1-3
Reserved
Default = 00h
®
Page 40
912-2000-030
Revision: 1.0