MVME5100 Single Board Computer Programmer's Reference Guide

2
Hawk PCI Host Bridge & Multi-Processor Interrupt Controller
Spurious Vector Register
Offset $010E0
Bit 3
1
3
0
2
9
2
8
2
7
2
6
2
5
Timer Frequency Register
2
4
2
3
2
2
2
1
2
0
1
9
1
8
VECTOR This vector is returned when the Interrupt Acknowledge
register is read during a spurious vector fetch.
This register is used to report the frequency (in Hz) of the clock source for
the global timers. Following reset, this register contains zero. The system
initialization code must initialize this register to one-eighth the MPIC
clock frequency. For the PHB implementation of the MPIC, a typical value
would be $7de290 (which is 66/8 MHz or 8.25 MHz).
2-118 Computer Group Literature Center Web Site
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0 9 8 7 6 5 4 3 2 1 0
Name VECTOR
Operation R R R R/W
Reset $00 $00 $00 $FF
Offset $010F0
Bit 3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
Name TIMER FREQUENCY
Operation R/W
Reset $00000000
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0 9 8 7 6 5 4 3 2 1 0