			    (F4DXL-UC4.1D) MAINBOARD 
		    CPU(MICROPROCESSOR)  INSTALL SELECTION
	  **CAUTION** PLEASE CHECK VOLTAGE OF CPU FIRST **CAUTION**
      
      CPU             JP11      JP12    JP13    JP17      JP18     JP19      
      --------------------------------------------------------------------
  5v  AMD486DX502     OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
  5v  AMD486DX662     OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
  5v  AMD486DX40      OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
#3.3v AMD486DX802     2-3       2-3     1-2,3-4  1-2,3-4  1-2      OPEN
  5v  AMD486DX802     OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
 3.3v AMD486DX1004    2-3       2-3     1-2,3-4  1-2,3-4  1-2      OPEN
  5v  AMD486DX662SL   1-2       1-2     1-2,3-4  1-2      5-6      1-2,3-4
  5v  CYRIX486DX40    1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                  
  5v  CYRIX486DX50    1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                        
  5v  CYRIX486DX502   1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                   
  5v  ITS486DX662     1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                  
 3.3v IBM486DXv662    1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3   
			5-6       5-6                             
 3.6v CYRIX486DXv662  1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3   
			5-6       5-6                             
 4.0v CYRIX486DX802   1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                  
3.45v CYRIX486DX1004  1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                  
3.45v CYRIX586DX100   1-2,3-4   1-2,3-4 1-2,3-4  1-2      1-2,5-6  1-2,3-4
      (cx5x86x)         5-6       5-6                  
  5v  INTEL486DX502   OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
  5v  INTEL486DX662   OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
  5v  INTEL486DX40    OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
  5v  INTEL486DX50    OPEN      2-3     1-2,3-4  1-2      OPEN     OPEN
  5v  OVERDRIVE DX662 1-2       1-2     1-2,3-4  1-2      5-6      1-2,3-4
  5v  ITS486DX662     1-2,3-4   1-2,3-4 1-2,3-4  1-2      2-3,4-5  2-3
			5-6       5-6                  
  5v  UMC486SX33      2-3       2-3     2-3      3-4      1-2      OPEN
  5v  UMC486SX40      2-3       2-3     2-3      3-4      1-2      OPEN
      
      #    = CONNECT BLACK WIRE JUMPER BETWEEN PIN 4 OF JP12 AND 
	     PIN 3 OF JP20
      CPU VOLTAGE     JP14,15,16      SW1     SW2     SW3     SW4     SW5                        
      5.0v                2-3         <-  DON'T  CARE  ->      RESERVED  
      4.0v                1-2         OFF     OFF     OFF      RESERVED
      3.6v                1-2         OFF     OFF     ON       RESERVED
      3.45v               1-2         OFF     ON      OFF      RESERVED
      3.3v                1-2         ON      OFF     OFF      RESERVED
     
      JP2  OPEN  = FOR USING EEPROM  (DEFAULT!)
	   1-2   = FOR USING 12volt FLASH ROM
	   2-3   = FOR USING 5 volt FLASH ROM
	  
      JP3  CLOSE = INTERNAL KEYBOARD CONTROLLER
  !!       OPEN  = EXTERNAL KEYBOARD CONTROLLER       (SHOULD BE CLOSE)!!!  
      JP21 CLOSE = VESA CLOCK > 33 MHz    
	   OPEN  = VESA CLOCK  33 MHz    (DX662 AND DX1004 IS ALSO 33MHz)
      JP22 CLOSE = 0 WS
	   OPEN  = 1 WS
			
      CPU CLOCK  JP4   JP5   JP6    CPU SPEED
      25MHz      OFF   OFF   ON     SX25, DX502
      33MHz      ON    ON    ON     SX33, DX33, DX662, DX1004, Cx5x86x100
      40MHz      OFF   ON    ON     SX40, DX40, DX802
      50MHz      ON    OFF   OFF    DX50, DX1004 (DUAL CLOCK)
	   
								   16AUG95
