Spurious Vector Register; Timer Frequency Register - Motorola MVME2600 Series Reference Manual
Mvme2600/2700 series single board computer
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Also See for MVME2600 Series:
- Installation and use manual (198 pages) ,
- Installation and use manual (20 pages) ,
- Programmer's reference manual (20 pages)
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Spurious Vector Register
Offset
Bit
3
3
2
2
2
1
0
9
8
7
Name
Operation
R
Reset
$00
VECTOR This vector is returned when the Interrupt Acknowledge
Timer Frequency Register
Offset
Bit
3
3
2
2
2
1
0
9
8
7
Name
Operation
Reset
This register is used to report the frequency (in Hz) of the clock source for
the global timers. Following reset, this register contains zero. system
initialization code must initialize this register to one-eighth the MPIC
clock frequency. For the Raven implementation of MPIC, a typical value
would be $7de290 which is 66/8 MHz or 8.25 MHz.
$010E0
2
2
2
2
2
2
2
1
1
1
6
5
4
3
2
1
0
9
8
7
R
$00
register is read during a spurious vector fetch.
$010F0
2
2
2
2
2
2
2
1
1
1
6
5
4
3
2
1
0
9
8
7
TIMER FREQUENCY
$00000000
Raven Interrupt Controller Implementation
1
1
1
1
1
1
1
6
5
4
3
2
1
0 9 8 7 6 5 4 3 2 1 0
R
$00
1
1
1
1
1
1
1
6
5
4
3
2
1
0 9 8 7 6 5 4 3 2 1 0
R/W
2
VECTOR
R/W
$FF
2-69
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