This 64K memory board uses 2K by 8 static RAMs for a low power and fast operation. It can operate at 2MHz while drawing less than 500mA. This board supports the SS-50C bus extended address (20 address lines) to allow up to 1M of memory in a system.
The board was design by Tanner Computers Inc (silk-screened on the lower left side of the board) and was marketed by Digital Research Computers of Texas. The copyright date on the board is 1981. The 48K kit cost $199.
Board Photo (59K JPG)
Board Photo High Resolution (426K JPG)
Assembly Instructions (65K PDF)
Digital Research Ad (130K JPG)