AlphaPC 164 Jumper Configuration
9
Figure 2 AlphaPC 164 Configuration Jumpers
J30 System Configuration Jumpers
IRQ3
1
3
5
7
9
11
13
15
17
19
21
23
25
CF0
CF4
CF5
CF6
CF7
CF1
CF2
CF3
Mini-Debugger (Default Out)
Boot_Option (Default Out)
Reserved (Default Out)
IRQ0
IRQ1
IRQ2
Reserved (Default Out)
Not Used
Frequency
Ratio IRQ3 IRQ2 IRQ1 IRQ0
Comments
All other combinations
In
Out
Out
Out
In
In
Out
In
Out
366 MHz
400 MHz
433 MHz
11
12
13
Out
Out
Out
Reserved
Bcache Size
Out
Out
All other combinations
CF1
CF2
Comments
1MB
Out
In
2MB
Reserved
Default
Bcache Speed
Out
All other combinations
CF4
CF5
Comments
9 ns
Out
Reserved
Default
MK-2306-36A
1
2
3
2 to 3 In = Enable (Default)
1 to 2 In = Disable
1
2
In = 128-Bit Bus
Out = 256-Bit Bus
Note: Jumper must be out when all
eight DRAM SIMM sockets are populated.
J31 Flash ROM Update Jumper
J1 Memory Bus Width Jumper
Out
In
Out
466 MHz
14
Out
Out
Out
500 MHz
15
Out
Out
