This was the first board
Electralogics introduced. It was a very nicely designed 64K static RAM board
well designed with some nice unusual features.
The board had On-board Bank Select (Cromemco standard) circuitary as well as
IEEE-696 Extended-Addressing capability. No wait states were necessary
with 4MHZ CPUs, (150 nsec RAM chips were used). The board also
accepted the Phantom line (S-100 line #67). There was an activity LED at the
top center of the board. Yellow meant the board was selected, red indicated
it was being accessed.
One really nice feature was the row of switches across the top of the board
allowed each 2K X8 RAM block the be selected or disabeled.
2716 EPROM's could be substituted for the 2K X 8 RAM chips. The board
used only the +8 Volt line. Typical active board consumption of 350
milliamps at 8 Volts. Inactive power consumption is less than 250 milliamps
at 8 Volts.
The manual for the board cam be obtain
here.
If you have a better/color picture of this board please let me know.
