82378ZB Datasheet, PDF (38/137 Pages) Intel Corporation – SYSTEM I/O APIC(SIO.A) AND

82378ZB (SIO) AND 82379AB (SIO.A)
E
Fixed Priority Mode
The fixed bank control bits select which requester is the highest priority device within that particular bank.
Mode 3
Bank
2b 2a
Table 5. Fixed Mode Bank Control Bits
Priority
1
0
Highest
Lowest
00
0
0
0
0
0
SIOREQ# REQ0#
REQ2#
REQ3#
CPUREQ# REQ1#
01
0
0
0
0
1
REQ0#
SIOREQ# REQ2#
REQ3#
CPUREQ# REQ1#
02
0
0
0
1
0
SIOREQ# REQ0#
REQ2#
REQ3#
REQ1#
CPUREQ#
03
0
0
0
1
1
REQ0#
SIOREQ# REQ2#
REQ3#
REQ1#
CPUREQ#
04
0
0
1
0
0
CPUREQ# REQ1# SIOREQ# REQ0# REQ2#
REQ3#
05
0
0
1
0
1
CPUREQ# REQ1#
REQ0#
SIOREQ# REQ2#
REQ3#
06
0
0
1
1
0
REQ1# CPUREQ# SIOREQ# REQ0# REQ2#
REQ3#
07
0
0
1
1
1
REQ1#
CPUREQ# REQ0#
SIOREQ# REQ2#
REQ3#
08
0
1
0
0
0
REQ2# REQ3# CPUREQ# REQ1# SIOREQ# REQ0#
09
0
1
0
0
1
REQ2# REQ3# CPUREQ# REQ1# REQ0#
SIOREQ#
0A
0
1
0
1
0
REQ2#
REQ3#
REQ1#
CPUREQ# SIOREQ# REQ0#
0B
0
1
0
1
1
REQ2#
REQ3#
REQ1#
CPUREQ# REQ0#
SIOREQ#
0C-0F 0
1
1
x
x
Reserved
10
1
0
0
0
0
SIOREQ# REQ0#
REQ3#
REQ2#
CPUREQ# REQ1#
11
1
0
0
0
1
REQ0#
SIOREQ# REQ3#
REQ2#
CPUREQ# REQ1#
12
1
0
0
1
0
SIOREQ# REQ0#
REQ3#
REQ2#
REQ1#
CPUREQ#
13
1
0
0
1
1
REQ0#
SIOREQ# REQ3#
REQ2#
REQ1#
CPUREQ#
14
1
0
1
0
0
CPUREQ# REQ1# SIOREQ# REQ0# REQ3#
REQ2#
15
1
0
1
0
1
CPUREQ# REQ1#
REQ0#
SIOREQ# REQ3#
REQ2#
16
1
0
1
1
0
REQ1# CPUREQ# SIOREQ# REQ0# REQ3#
REQ2#
17
1
0
1
1
1
REQ1#
CPUREQ# REQ0#
SIOREQ# REQ3#
REQ2#
18
1
1
0
0
0
REQ3# REQ2# CPUREQ# REQ1# SIOREQ# REQ0#
19
1
1
0
0
1
REQ3# REQ2# CPUREQ# REQ1# REQ0#
SIOREQ#
1A
1
1
0
1
0
REQ3#
REQ2#
REQ1#
CPUREQ# SIOREQ# REQ0#
1B
1
0
1
1
REQ3#
REQ2#
REQ1#
CPUREQ# REQ0#
SIOREQ#
1C-1F 1
1
1
x
x
Reserved
38