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NorthStar - 48k Dynamic RAM Board
There were three versions of the HRAM board: The HRAM-64 with 64K bytes, HRAM-48 with 48K bytes, and HRAM-32 with 32K bytes. The only significant difference between these boards is the amount of memory they contain. All three versions incorporate parity error checking and bank  switching  capabilities.

NorthStar 64K DRAM

There were slight jumper differences between the boards, but the one manual was used for all 3 boards. 
The manual can be obtained here


Other NorthStar S-100 Boards
16K Dynamic RAM     32K Dynamic RAM    48K Dynamic RAM    64K Dynamic RAM    8088-SBC  
FP Board   MDC-FDC   MDS-FDC   SIO   UP8   Z80CPU  HDC


This page was last modified on 10/25/2013