Chapter 2 General Features
Hippo DCA2 User’s Manual
10
2.3
Jumper Description Table
Jumper
Description
Setting Option
JP1
Fan voltage select (+12/+5V)
1-2
2-3
*
+5V
+12V
JP2
Fan connector
--
<RFU>
JP3
CPU clock speed select
1-2
2-3
*
25 Mhz
33 MHz
JP4
CPU clock speed select
1-2
2-3
*
25 Mhz
33 MHz
JP5
CPU reset signal source
1-2
*
<RFU>
JP6
CPU initialization signal source
open
*
Cyrix, SL
JP7
Cyrix CPU type select
1-2
2-3
open
*
2 x CLK
1 x CLK
JP8
Floating point error pin select
1-2
2-3
open
*
486DX,DX2
487
486SX
JP9
VL-Bus operation
2-3
open
*
nonsynch.
synch.
JP10
Non-maskable interrupt select
1-2, 3-4
2-3
*
486DX,DX2,487
486SX
JP11
CPU bus speed type selection
1-2
2-3
*
CPU > 33Mz
CPU <= 33Mz
JP12
VL-Bus wait state selection
1-2
2-3
*
1 wait state
0 wait state
JP13
SL-CPU select
2-3
*
<RFU>
JP14
SL-CPU select
2-3
*
SL
JP15
Cyrix CPU support
2-3
*
<RFU>
JP16
CPU clock multiplier - 2.5x
open
*
<RFU>
JP17
Clock multiplier - 2x
open
*
<RFU>
JP18
EPMI
open
*
<RFU>
JP19
CMOS discharge
1-2
2-3
*
discharge
preserve
JP20
Power Good Generation
1-2
2-3
*
off-board
on-board
JP21
Color / Mono display select
1-2
2-3
*
color
mono
JP22
Cyrix CPU Voltage Select (+3.3V)
open
*
<RFU> !
JP23
Cyrix CPU Voltage Select (+3.6V)
open
*
<RFU> !
JP24
Cyrix CPU Voltage Select (+3.8V)
open
*
<RFU> !
JP25
Cyrix CPU Voltage Select (+4.0V)
open
*
<RFU> !
JP26
Intel / AMD CLKMUL Select
1-2
2-3
*
<RFU>
JP27
CPU Voltage Auto-detect for Intel / AMD
CPU (+5.0V or +3.45V)
1-2
open
*
<RFU> !
JP28
Force CPU Voltage to +5.0V
open
*
<RFU> !
JW1
VL-Bus operation
1-2
2-3
*
nonsynch
synch
* Factory Default Settings
<RFU> reserved for future use
Caution, consult your dealer before making changes to voltage select jumpers. Improper
settings could cause permanent damages to the CPU.
