Display; Character Display Control System - Sharp MZ-80B Owner's Manual

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2.3 Display
There are two display control system: character display control and graphic display control. The
character display control system displays character on the CRT screen using the character V-RAM and
character generator. The graphic display control system displays optional curves and dot patterns of
high resolution using the graphic V-RAM.
2.3.1 Character display control system
Characters generated by the character generator of the MZ-80B are shown in FIGURE 2. 21 along
with their corresponding ASCII codes.
As shown in the figure, character from "~" ($1 F) through
"1r"
($FF) can be displayed on the
CRT screen.t Input of these characters from the keyboard was explained previously. Characters en-
tered are displayed at the position where the cursor is located. The cursor pointer is controlled by the
monitor program. The cursor position is changed by one of control codes $01
~$06.
See ASCII code.
table: FIGURE 2.22.
FIGURE 2.20 shows forms in which the character "A" can be displayed control of the character
display control system.
40 characters/line
80 characters/line
Normal mode
•
Reverse mode
•• • •
.,
.
••••••
• •
•
•
•
•
FIGURE 2.20 Character "A" displayed in various modes
t
Some special characters, such as
<? ,
H
and
C
which indicate movement of cursor are displayed when a BASIC
program file generated by the Sharp MZ-80K personal computer is converted .