In situ schaer programmer.

 
                                                       5v

                                                       |14
                           5V-[10K]--+       +---------+--------+
                  1|\  2             |     13|                  |
  D0 (2)-----------+  >--------------+-------+ RB7/Data         |
                   |/                |       |                  |
      +5V-[10k]-+                    |       |                  |
                | 12 /|13            |       |    PIC 16C84     |
Busy (11)-------+--<  +--------------+       |     18 pin       |
                     \|                      |    ZIF Socket    |
                            5V-[10k]--+      |                  |
                  3|\  4              |    12|                  |
   D1 (3)----------+  >---------------+------+ RB6/Clock        |
                   |/                        |                  |
                           12V-[10K]--+      |                  |
                  5|\  6              |      |                  |
   D2 (4)----------+  >---------------+-o   4|                  |
                   |/                   o----+ -MCLR/Vpp        |
                  (7407)            5v--o    +---------+--------+
                                                       |5

                                                       GND
              5V
              |14
           +--+--+
           | 7407|
           +--+--+
              |7
             GND