Radio Shack TRS-80 Model 3 - Page 89

$VDCLS- 457/X'OlC9'
Clearthe VideoDisplay Screen
Entry Conditions
None
ExitConditions
All registers are altered.
Sample Z-80 Program
See$CSHWR.
$VDLINE-539/X'021B'
Display a Line
This subroutine displays a line. The line must be terminated with an ASCII ETX
(X'03') or carriage return (X'OD'). If the terminator is a carriage return, it will be
printed;
if itis anETX, it will notbe printed. This allows VDLINE to position the
cursorto the beginning
of the nextline or leave it at the position after the last text
character.
Entry Conditions
(HL) = Output text, terminated by X'03' orX'OD'.
ExitConditions
(HL) = Firstcharacterafterthe terminator.
DE is altered.
Sample Z-80 Programming
See$CSHWR.
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