ACT apricot - Page 255

SCREEN DRIVER
Note On the ORIGIN MODE:
When set, line 1 is the top line of the current scrolling
region;
the cursor cannot be moved (by the ANSI sequences)
outside of this area. When reset, line 1 is the top line and the
cursor can then move freely around the whole screen. The
cursor is homed whenever the origin mode is reset, or the
scrolling margins are set.
The screen driver also handles a number of the standard
ASCII control codes, which have values less than 31 (20
hex).
The follwing codes are not acted upon, and no characters
are
output:
O-NUL
I-SOH
2-STX
3-ETX
4-EOT
5-ENQ
6-ACK
16 - DLE
17 -
DCl
18 - DC2
19 - DC3
20DC4
21 NAK
22
SYN
23 ETB
25EMM
26 SUB
28 FS
29 GS
30 RS
31 US
32 DEL
These codes, however, perform specific functions:
07 - BEL Sounds the internal bleeper
08 - BS Moves the cursor back one space
09 - TAB Moves the cursor RIGHT in modulos of eight
10 - LF Move the cursor down one line
11- VT As above (LF)
12-FF As above (LF)