Radio Shack TRS-80 Model II Reference Manual page 140

Modell! TRSDOS
V Toggle Video Filter
Some data characters cause undesirable results when output to the display. For
example, if an ESC (X' I B') is output, it clears the screen and homes the cursor.
The video filter option lets you prevent this from happening by' 'filtering" these
characters from the display. If the
RAM
buffer is open, they will be saved in
RAM,
regardless of the state ofthis option.
Here is a list offiltered codes when the option is on (all codes are given in
hexadecimal) :
OI,02,03,04,05,06,07,OB,OC,OE,OF,
10,11,12,13,14,15,16, IE, IF
If any of these characters is received while the video filter is on, a "± " will be
displayed in its place.
Q Quit
This command returns control to
TRSDOS.
Any data in the
RAM
buffer will be lost
(i.e., you cannot restart
TERMINAL
and recover it).
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