ACT apricot - Page 253

SCREEN DRIVER
When ESCAPE z is used, the following action is taken:
1. The screen is cleared (including the 25th line) and
the cursor is homed.
2. Any modes (ie reverse, underline, intensity) are
switched OFF.
3. The cursor is switched ON, and set to BLOCK,
non -flashing.
4. The Mouse Port, Margin Bell, 25th Line, Hold Mode,
Auto CR and Auto LF are all disabled.
ANSI Escape Sequences
Many third-generation machines support the ANSI
(American National Standards Institute) set of escape
sequences.
So as to retain compatibility, many of the ANSI
codes are incorporated on the Apricot:
CU : Cursor Movement Functions
MNEMONIC PARAMETER CODE
CUU
n
A
CUD n
B
CUF n
C
CUB
n
D
CUP
Y;X
H
HVP
X;Y
f
FUNCTION
Moves the Cursor UP n lines
Moves the Cursor DOWN n lines
Moves the Cursor FORWARD n columns
Moves the Cursor BACK n columns
Positions the Cursor at Y,X
Same as CUP, except parameters are
reversed
ER : Text Erase Functions
MNEMONIC PARAMETER CODE
* ED
0
J
* ED
1
J
ED 2
J
EL 0
K
* EL
1
K
* EL
2 K
CP : Report Functions
MNEMONIC PARAMETER CODE
CPR
l;c
R
FUNCTION
Erase from cursor to end of screen
Erase from start of screen to cursor
Clear screen,
but don't home the cursor
Erase from cursor to end of line
Erase from cursor to start of line
Erase the entire line that cursor is on
FUNCTION
Put cursor position into keyboard
buffer