M912 ver:1.7 / DX-6900 Jumper Settings
| DIAGRAM | JUMPERS | MEMORY | BIOS |
PC Chips M912 ver:1.7 w/black ISA slots, AMDDX4 support and Real Cache - aka DX-6900 JUMPER SETTINGS
JP1 - External Battery Connector/Clear CMOS
JP2 & JP3 - Select Active BIOS & Flash Voltage
JP6 JP7 & JP8 - CPU Clock Selection Jumper
JP15 - Keylock & Power LED
JP16 & JP17- VL-Bus Wait State
JP18 - Speaker
JP19 - Turbo LED
JP20 - System Reset
JP22 - Turbo Switch
JP23 - Green Mode Trigger Switch
JP24 JP25 JP26 & JP35 - CPU Power Selectors
CPU Type Selection Jumpers
JP36 - closed ... undocumented jumper function
JP1 - External Battery/Clear CMOS                                                         TOP
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Jumper    Pin    Assignment
----------------------------------------------------------------------------------------------------
  2 - 3                 Normal Operation
  3 - 4                 Clear CMOS
                  1      External Battery (+)
                  4      External Battery (-)
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Please make sure the pins 2-3 are shorted before using the system board.  The systemboard is shipped from the factory with pins 3-4 shorted to prevent battery drain during storage.  Failure to reset this jumper at pins 2-3 would prevent the boardfrom powering up.
 

JP2 & JP3 - Select Active BIOS & Flash Voltage                                        TOP
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Assignment               Jumper     Pins
----------------------------------------------------------------------------------------------------
AMI Bios Active               JP2       1 - 2
AWARD Bios Active       JP2       2 - 3
Flash ROM 5 volt             JP3       1 - 2
Flash ROM 12volt            JP3       2 - 3
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Note: Altering JP2 will have no effect unless the current BIOS chip has both programs stored. The original manufacturer installed BIOS chips were PROMs and not flashable so upgrading them is impossible without the correct EEPROM installed, unless of course you own an EPROM Burner.
 


JP15 - Keylock & Power LED                                                                     TOP
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Pin         Assignment
----------------------------------------------------------------------------------------------------
 1            LED Power
 2            Not Connected
 3            Groung
 4            Keyboard Lock
 5            Ground
==================================================
 

JP16 & JP17 - VL-Bus Wait State                                                            TOP
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State                              JP16      JP17
----------------------------------------------------------------------------------------------------
Normal (= OR < 33MHz)   OPEN    OPEN
Extra Wait ( > 33MHz)     SHORT   SHORT
==================================================
 

JP18 - Speaker                                                                                                TOP
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Pin         Assignment
----------------------------------------------------------------------------------------------------
 1            Speaker Data Out
 4            +5V
==================================================
 

JP19 - Turbo LED                                                                                            TOP
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Pin         Assignment
----------------------------------------------------------------------------------------------------
 1            LED (+)
 2            LED (-)
==================================================
 

JP20 - System Reset                                                                                    TOP
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Pin         Assignment
----------------------------------------------------------------------------------------------------
 1            Reset
 2            Ground
==================================================
 

JP22 - Turbo Switch                                                                                       TOP
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Jumper      State
----------------------------------------------------------------------------------------------------
 OPEN        Turbo
  1 - 2          Non-Turbo
==================================================
 

JP23 - Green Mode Trigger Switch                                                            TOP
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Jumper             State
----------------------------------------------------------------------------------------------------
Trigger Once       Green Mode
Trigger Again      Normal Operation
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This is a toggle switch so please do not keep this jumper shorted or else the system will have a problem waking up or booting after a reset.  For this reason, do not use the Turbo button on the system chassis for this switch, since one may forget to release the button after triggering the system into green mode.
 

JP6 JP7 & JP8 - CPU Clock Selection Jumper                                    TOP
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CPU Clock   CPU Frequency         JP6        JP7        JP8 ----------------------------------------------------------------------------------------------------
   25MHz         DX2-50MHz          OPEN    OPEN    SHORT
   33MHz         DX2-66MHz          SHORT  SHORT  SHORT
                      DX4-100MHz                   
                      5x86-100MHz                  
                      5x86-133MHz                
   40MHz         DX-40MHz            OPEN   SHORT   SHORT
                      DX2-80MHz                    
                      DX4-120MHz                   
                      5x86-120MHz           
   50MHz         DX-50MHz            SHORT  OPEN    OPEN
==================================================
 

JP24 JP25 JP26 & JP35 - CPU Voltage Jumpers                                TOP
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CPU Voltage    JP24    JP25    JP26    JP35
----------------------------------------------------------------------------------------------------
   5 Volts           2 - 3     2 - 3     2 - 3    SHORT
   3.3 Volts        1 - 2     1 - 2     1 - 2    SHORT
   4 Volts           1 - 2     1 - 2     1 - 2    OPEN
==================================================
 

CPU Type Selection Jumpers                                                                     TOP
==================================================  
           |       486 NON-SL ENHANCED     |                   486 SL ENHANCED                  |
           |-----INTEL/AMD--|--------AMD---------|----------INTEL-------|---------CYRIX/IBM/TI---------|
           |  SX   |  DX DX2 |  DX2   |  DX4   |  DX DX2 |  DX4  |   DX    |  DX2   |DX2-V80|
----------------------------------------------------------------------------------------------------
VOLT    5V          5V        3.3V      3.3V         5V        3.3V      5V       3.3V        4V
JP24    2 - 3       2 - 3       1 - 2      1 - 2        2 - 3      1 - 2      2 - 3     1 - 2        1 - 2
JP25    2 - 3       2 - 3       1 - 2      1 - 2        2 - 3      1 - 2      2 - 3     1 - 2        1 - 2
JP26    2 - 3       2 - 3       1 - 2      1 - 2        2 - 3      1 - 2      2 - 3     1 - 2        1 - 2
JP27    OPEN    OPEN     OPEN   OPEN     1 - 2      1 - 2      2 - 3      2 - 3       2 - 3
                                                                    3 - 4      3 - 4
JP28    2 - 3       2 - 3        2 - 3     2 - 3        1 - 2      1 - 2      1 - 2     1 - 2        1 - 2
                                                                                               3 - 4     3 - 4       3 - 4
                                                                                               5 - 6     5 - 6       5 - 6
JP29    OPEN    OPEN     OPEN   OPEN     1 - 2      1 - 2      1 - 2      1 - 2       1 - 2
                                                                                               3 - 4     3 - 4       3 - 4
                                                                                               5 - 6     5 - 6       5 - 6
JP30    OPEN    OPEN     OPEN   OPEN     5 - 6       5 - 6      2 - 3     2 - 3       2 - 3
                                                                                               4 - 5     4 - 5       4 - 5
JP31    OPEN    OPEN     OPEN   OPEN     OPEN    OPEN   OPEN   OPEN    OPEN
JP32    OPEN    1 - 2        1 - 2     1 - 2        1 - 2      1 - 2      1 - 2      1 - 2       1 - 2
JP33    2 - 3       1 - 2        1 - 2     1 - 2        1 - 2      1 - 2      1 - 2      1 - 2       1 - 2
                          3 - 4        3 - 4     3 - 4        3 - 4      3 - 4      3 - 4      3 - 4       3 - 4
JP34    SHORT  SHORT  SHORT OPEN     OPEN    OPEN   OPEN   OPEN     OPEN
JP35    SHORT  SHORT  SHORT SHORT  SHORT  SHORT SHORT SHORT   OPEN
==================================================

==================================================
          
|---------------------CYRIX/IBM---------------------||------------------------AMD-----------------------|
               |     IBM DX4-GC    |     IBM DX4-GIC   ||      486DX4 (8B)      |                      |
               |     CYR DX4-GP   |    CYR DX4-GP4   || PLUS/WRITEBACK |                     |
               |    (M7 PINOUT)    |   (P24D PINOUT)  ||    (P24D PINOUT)   |    5x86-133   |
----------------------------------------------------------------------------------------------------
 
VOLT              3.3V                         3.3V                       3.3V                      3.3V    
   JP24               1 - 2                         1 - 2                        1 - 2                      1 - 2
   JP25               1 - 2                         1 - 2                        1 - 2                      1 - 2
   JP26               1 - 2                         1 - 2                        1 - 2                      1 - 2
   JP27               2 - 3                         1 - 2                        1 - 2                      1 - 2
                                                          3 - 4                        3 - 4                      3 - 4 
   JP28               1 - 2                         1 - 2                        1 - 2                      1 - 2
                          3 - 4                         4 - 5                        4 - 5                      4 - 5
                          5 - 6
   JP29               1 - 2                         1 - 2                        1 - 2                      1 - 2
                          3 - 4                         4 - 5                        4 - 5                      4 - 5
                          5 - 6                                
   JP30               2 - 3                         3 - 4                        3 - 4                      3 - 4
                          4 - 5                         5 - 6                        5 - 6                      5 - 6
   JP31              OPEN                       OPEN                    OPEN                     2 - 3
   JP32               1 - 2                         1 - 2                        1 - 2                      1 - 2
   JP33               1 - 2                         1 - 2                        1 - 2                      1 - 2
                          3 - 4                         3 - 4                        3 - 4                      3 - 4
   JP34              OPEN                       OPEN                    OPEN                    OPEN
   JP35             SHORT                     SHORT                  SHORT                  SHORT
==================================================

Here are the Intel Overdrive processor's jumper settings:

	JP27 1-2, 3-4
	JP28 1-2
	JP29 1-2
	JP30 5-6
	JP32 2-3
	JP33 1-2, 3-4
	JP31 3X 2.5X 2X
	OPEN 1 - 2 2 - 3
	
It should show up as P24T in your bios.

| DIAGRAM | JUMPERS | MEMORY | BIOS |