Katakana
Feature
This feature provides the special Katakana graphics
for
the display and the printer,
in
place
of
the normal
country select graphics.
MODELS
The 5100 Portable Computer is available in
thr~e
basic
models:
A.
B,
and
C.
Model classification is derived
from
the programming language used by the 5100. The
models are further divided according
to
the
alT,lount
of
storage available. The following chart shows the models
with
the various storage combinations.
Model
Language
Storage
A1
APL
16K
A2
APL
32K
A3
APL
48K
A4
APL
64K
B1
BASIC
16K
B2
BASIC
32K
B3
BASIC
48K
B4
BASIC
64K
C1
APL
and
BASIC
16K
C2
APL
and
BASIC
32K
C3
APL
and
BASIC
48K
C4
APL and BASIC
64K
APL - A Programming Language
BASIC - Beginners All-Purpose Symbolic Instruction
Code
FUNCTIONAL
UNITS
Keyboard
The 5100 keyboard consists
of
a standard typewriter·
keyboard and a
10-key
pad. There are additional control
keys used
to
communicate with the computer and
to
modify the input.
Display
Adapter
Card
The display data register located in the display adapter
card receives data from the display buffer
in
read/write
storage. The data from the display data register is used
to
select a
dot
pattern on the display card. The display
adapter card generates all signals required
for
the
synchronization
of
the display.
44
Controller
The controller card
(G2)
controls the data
flow
throughout the 5100. The controller communicates
directly with
read/write
storage, executable
ROS,
the
base
I/O
adapter,
and
the display adapter.
Storage
Read
Only Storage (ROS)
ROS
contains the code used
to
develop the
APL
and
BASIC language functions, the microprograms used
to
control the operation
of
the various features, and the
microprograms used
to
direct the overall operation
of
the 5100 computing system.
Read/Write Storage
Read/write storage is used
to
temporarily store data
and programs.
It
is also used
to
store status
information.
Base
I/O
Card
The base
I/O
card is a distribution point between
I/O
units and the computer. This card provides repowered
signals
to
more remotely located components.
It
also
contains the adapter
for
the keyboard and the internal
tape drive.
I/O
Cable
Driver
The
I/O
cable driver card (A2) repowers the signal lines
for
the 'bus in' line, the 'bus out' line, and the control
lines
to
the external
I/O
devices.
Microprogramming
Most
5100 operations are controlled by microprograms
located in
ROS.
Some feature microprograms (such
as
microprograms
for
the Serial
I/O
Adapter feature)
are
loaded into
read/write
storage
from
the tape.
,
,
\,,~
,/
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