This is the processor board from the S100 bus 6809 computer.  Hidden under the 6809 daughterboard, is the number MD-690A C 1978 (1979?) LOS ANGELES CA  micro da sys
 

AT the bottom is I/O P3, pins are labeled G, +5, and PB1 thru PB6.  Near the top is RS 232 P4, and at the left is TAPE P2, pins labeled G, CO, RC, CI, G.  Bottom left is the 14 pin socket and what's left of the ribbon cable for KEYBOARD P1 connector.  Rats ate the cables....

This is the Solid State Music Video Interface Board, VB1B, C. 1977.  The remains of the coax video cable are on the left, near the trimmer and resistors.