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PMS ADDRESSES
A PMS consists of two banks of RAM,
each
of
which
contains
8K
bytes
of
memory.
Each bank can be accessed independently.
A permanent plug-in module
can contain up to two full PMS banks.
The address of a particular
PMS
bank
depends
upon the port into which the PMS is plugged.
The ports are searched
in sequence from left to right.
The two banks of the first PMS found will be
designated as ROMA and ROMB.
--
I
I
ROMA
ROMC
ROME
ROMB
ROMD
ROMF
))
))
))
PORT
1
PORT
2
PORT
3
Addresses Using Three PMS's
I
I
ROMA
ROMB
))
PORT
3
Addresses Using One PMS
HOW TO TURN THE PMS ON AND OFF
Operating power for the PMS is obtained from the HP-75.
Therefore,
to
the
simulator
on and off you need only to turn the HP-75 on and off.
to removing the PMS (or a permanent plug-in module), execute the
CLEAR
command
to
insure
that
the
HP-75
will not expect the plug-in unit
present when it is turned on again.
8
turn
Prior
VARS
to be
I
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