HOW TO ADD A TRUE HARDWARE RESET BUTTON TO THE IBM PC


         FOR ABOUT $4.00 I ADDED A TRUE HARDWARE RESET BUTTON TO MY
         IBM/PC. IT'S EASY, TAKES ABOUT 30 MINUTES AND WORKS. HERE'S
         HOW TO DO IT.

         THE IBM/PC 8088 PROCESSOR DERIVES IT'S CLOCK SIGNAL FROM AN
         INTEL 8284A CLOCK CHIP. THIS CHIP ALSO OUTPUTS A RESET LINE.
         TO ACTIVATE THIS RESET LINE AN INPUT LINE CALLED POWER
         GOOD (PWRGOOD ON THE LOGIC DIAGRAMS) MUST BE SHORTED TO
         GROUND MOMENTARILY. THIS LINE COMES IN TO THE CHIP ON
         PIN 11. WHEN THIS PIN IS SHORTED TO GROUND AND THEN RETURNED TO
         NORMAL, THE 8284A GENERATES THE RESET SIGNAL ON PIN 10
         WHICH IS SENT TO THE 8088 PIN 21 AND THE BOOT PROCESS
         BEGINS!

         THE 8284A IS LOCATED IN A SOCKET NEXT TO THE POWER SUPPLY

                                      |
         ____    ____     ___         |
        |    |  |    |   |   |        |
        |8088|  |8087|   |   |        |
        |    |  |    |   |   |        |       POWER
        |    |  |    |   |___|        |
        |    |  |    |                |       SUPPLY
        |    |  |    |    ___         |
        |    |  |    |   |   |        |
        |    |  |    |   |   |        |
        |    |  |    |   |   |        |
        |____|  |____|   |___|        |
                                      |
                          ___     _   |
                         | 8 |   (_)  |
                         | 2 |        |
          THIS IS IT --> | 8 |   __   |
                         | 4 |  |  |  |
                         |_A_|  |__|  |
                                 ^    |______________________________
                                 |
                                 |
                               CRYSTAL


         GO TO RADIO SHACK AND GET:                  (I USED THESE)

         (1) AN 18 PIN DIP SOCKET                    (CAT 276-1992)
         (2) A SPST MOMENTARY PUSH BUTTON SWITCH     (CAT 275-1566)
         (3) LIGHT GAUGE WIRE (SHIELDED AUDIO 24 GA) (CAT 278-1276)

         SOLDER THE SWITCH ACROSS PINS 11 & 13 OF YOUR NEW SOCKET USING  2 INNER
         THE TWO INNER WIRES AS SHOWN BELOW:

                NOTICE THE NOTCH !!
                     ____    ___
     PIN 1 -------> |    |__|   |  <----- PIN 18
                    |           |
                    |           |
                    |           |                  SWITCH
                    |           | SOLDER             ___
                    |  PIN 13 > | __________________|   |_
                    |           |                   |   | |
                    |  PIN 11 > | __________________|   |_|
                    |           |                   |___|
     PIN 9 -------> |___________| <------ PIN 10



         NOW REMOVE THE 8284A FROM THE CURRENT SOCKET AND INSERT
         IT IN YOUR NEW SOCKET. NOW INSERT THE NEW SOCKET CONTAINING
         THE 8284A IN THE OLD SOCKET ON THE MOTHERBOARD. RUN YOUR
         SWITCH OUT THE BACK AND NOW YOU HAVE A RESET BUTTON!!
         NOTE MAKE SURE THE NOTCH IN THE OLD SOCKET, NEW SOCKET,
         AND 8284A ARE ALL ALIGNED. DON'T SHORT ANY OTHER PINS AND
         YOU SHOULD HAVE NO TROUBLE. MY SYSTEM WORKS OK AND I CAN
         WARM BOOT AND STILL HAVE THE CONTENTS OF MY RAM DISK ON
         MY JRAM BOARD, EVEN IF THE SYSTEM LOCKS UP AND WON'T
         ALT-CNTL-DEL BOOT. IT SEEMS TO BE AS RELIABLE AS POWER
         OFF.

         GOOD LUCK    DON GENTRY