HRAM USER/TECHNICAL MANUAL
INTRODUCTION 1
This manual supplies the user of the HORIZON Random
Access Memory (HRAM) board with information he or she
needs to install the board and put it into operation.
This includes information on selecting the various
memory options, testing the board and resolving any
difficulties associated with system integration.
The manual also provides information for service
technicians and engineers who may wish to evaluate the
technical aspects of the board or to undertake its
repair.
1.1.1 GENERAL DESCRIPTION
The HRAM board is a random access memory board
designed for use in the HORIZON computer system.
There are three versions of the HRAM board: 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.
1.2 WARRANTY
North Star Computers, Inc., warrants the electrical
and mechanical parts and workmanship of this product
to be free of defects for a period of 90 days from
date of purchase. If such defects occur, North Star
Computers, Inc. will repair the defect at no cost to
the purchaser. This warranty does not extend to
defects resulting from improper use or assembly by
purchaser, nor does it cover transportation to the
factory. Also, the warranty is invalid if all
instructions included in the accompanying
documentation are not carefully followed.
