(
(
(
(
(
Display
All data entered through the keyboard is displayed on
the 5100
5-inch
screen and is shown on a
TV
monitor
if
one is attached. The display can show as many
as
1,024 characters. There are 16 lines per display and 64
characters per line.
Each
line is made up
of
12 rows; 8
rows contain the characters and
4 rows contain blanks
between the characters. (See the display screen
example
in
this section.)
The display unit can only present the characters
represented
in
the 2048 x 16 display
ROS.
These
characters include alphabetic, numeric, and special
characters. When the DISPLAY REGISTERS switch is
active, the display is limited
to
the 16 hexadecimal
characters.
DISPLAY ADAPTER
The display adapter is on card
J2.
It
receives data
from
the 'read data bus' lines through cycle steal controls.
Signals generated by the display adapter are sent
to
the
display unit and
TV
monitor
to
form characters. The
adapter supplies three signals
to
the display unit and
one signal (the
'+monitor
composite video' line)
to
the
TV monitor jack.
ROS
Control Lines
Executable
ROS
H2
Storage
Read
Bus
APL Executable
ROS,
APL
ROS
C2,D2,D4
Address
Bits
Data
Bits,
and
Controls
Data Bits
Common
and
Language
ROS
E2
Basic
ROS
C4
I/O
Address Bits
and
Controls
Interrupt
Controls
Base
I/O
F2
Control
Lines
Storage Address Bits
R/W Storage
K2, K4, L2, L4,
M2, M4, N2, N4
Controller
~2
I..---r--.....,r---
..
Address Bits L...-_..,..-
__
..,..-_
..
Storage Address Bits
r---L--.....r..:;.:;:.:~
Bus
Out Bits
Device
Address
Bits
I
I
I
I
1
1
_______
_
H4
Storage
Write
Bus
Display
445
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