BCC-500 Discrete microcode ROM board
||Handwritten in black on the component side of the board
||Printed in solder to the right of the component side near the insertion end
||Printed in solder along the edge near the insertion end on the component side
||Scratched into the component side of the board on the right side near the insertion end
overall: 1/4 in x 10 in x 12 in
The board is 64 micro code words by 90 bits wide. There is a stiffener at one end near the double sided connector with a total of 136 pins.
Component/cable / connector