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Radio Shack TRS-80 Model III - Power-On and Start-Up

Radio Shack TRS-80 Model III
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6/
Add-Ons
Inside
the
Display Console are slots for eight printed circuit boards.
Four
of
these slots are taken up by the boards required by the basic system -
Processor,
Video
Display, Floppy Disk Controller, and Random Access
Memory
(RAM).
Adding RAM
If
your
system has 32K
of
RAM,
you can add another 32K by returning the
unit
to
Radio
Shack.
Another
32K board will be added to the card-cage,
leaving
three
slots still
open
for future enhancement
of
your system.
Systemsshippedwith64K
of
RAM
have four slots openfor future additions,
since a single 64K board
is
used in place
of
two 32K boards.
Decimal Address
r-~------------.....,
o
Hexadecimal Address
X'OOOO'
32767
32768
65535
32KRAM
STOPS
HERE
X '7FFF'
X '8000'
X 'FFFF'
RANDOM
ACCESS
MEMORY CONFIGURATION AFTER SYSTEM IS INITIALIZED
21

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