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INTRODUCTION
The North Star 16K byte RAM board (RAM-16-A) is compatible with
S-100 computers.
The board will operate at full speed with both
8080 and Z80 microcomputers, even with 4 MHz operation.
The
industry standard 16-pin 4027 RAM chip (200 nanoseconds access)
is used.
A parity option is available for use with the RAM-16-A.
The RAM-16-A may be addressed to any 16K region beginning at any
8K boundary.
The RAM-16-A has a bank switching feature which
allows more than 64K bytes of RAM to be used in the computer, and
also facilitates special software applications such as
time~
sharing.
If you have purchased the RAM-16-A as a kit, then first skim the
entire manual.
Be sure to carefully read the Assembly
Information section before beginning assembly.
If you have
purchased the RAM-16-A in assembled form, you may skip the
Assembly section.
Regardless of whether you purchased the RAM-
16-A as a kit or assembled, be sure to read the
Configur~tion
section which discusses how to configure the RAM-16-A for each
individual application.
CAUTIONS
1.
Correct this document from the errata sheets, if any, before
doing anything else.
2.
Assembly of this product from a kit is a complex, demanding
project.
It should not be attempted without previous kit
building experience.
3.
Do NOT insert
oi
remove any boards from the computer when the
power is on.
Note that power is not completely off until the
capacitors have discharged, several seconds after turning off
the computer power switch.
4.
Do NOT insert or remove IC's from any board while the power
is turned on.
5.
Be sure that all IC's are inserted in their correct positions
and with correct orientation before turning on the power. : Be
sure that all IC pins are correctly inserted in the socket
and are not bent under the IC and are not outside the socket.
6.
Carefully observe the prescribed rules for handling the MOS
type integrated cirucits.
The handling procedures are
described in the Assembly Information section of this manual.
North Star 16K RAM Board
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