COMPUTER OPERATIONS INC C-10450-01 board layout (revised)


-- HANDLE --------------------------------------------------------- HANDLE --

       57   56    55     54                         53                    52  r
      7406 7410  7408   7408                     R220/330                7406
CDJ2                                  CCJ1                       CDJ2
                                             47
       51   50    49     48  r               7406   46                    45
      7406 SP380 7438   7404                       7404                  7404


 44    43          42     41     40          38     37     36    
8881  7404        7402   7408   7410   39   7404   7408   9002    35     34
    R                                 8881                       8881   8881

 33    32          31  r  30     29    28    27     26     25     24     23
SP380 74157       74S74  7474   74S11 SP380 74157  7474   jump   SP380  74157


 22    21  r      20     19 r   18     17    16  r  15     14     13     12  r
74195 74157      8881   8881 r 7430   74195 74157  74S74  8815   74195  74157
                                                         (7425)
    R
 11    10         09     08     07     06    05     04     03     02     01
SP380 8881       SP380  8881   SP384  SP380 8881   8881   jump   SP380  8881

- EDGE CONNECTOR ---- EDGE CONNECTOR -- EDGE CONNECTOR ---- EDGE CONNECTOR -

Notes:
* This key is as seen from the A side
* Chips are on A side, Chip numbers are visible on B side
* r = 1K 5% resistor (brown black red gold)
* R = 390 5% resistor (orange white brown gold orange)
* jump = jumpers
* the notation (7425) is on the chip
* most of the 4-digit date codes are in 1973 and 1974, complicating things
* all capacitors are 0.01M 16V

I've tried to make the layout match the board fairly closely.