Quantum Data 801GC, 801GF, 801GX Draw Text string, Tobl, Set levels relative to BLanking, 168

TEXT	draw TEXT string
Classification:	Custom image primitive
Command Syntax:	Text <color> <x> <y> <fontname> <“text “>
Limits:	<color> = available colors
	<x> = position of left edge of page in pixels
	<y> = position of top edge of page in pixels
	<fontname> = available fonts
	<text> = approx. 30 characters (must be enclosed by quotes)
Query Syntax:	None
Description:	Draws a user-defined text string. It uses five (5) parameters.
	The first is color. The next two are the X and Y coordinates for
	the upper left corner of the starting position of the string. The
	fourth parameter selects the font. (Recall that only #0 Sys 16
	and #1 OPIX 9 are full alphanumeric sets.) The last parameter
	is the text string. If the string is longer than one word, it must
	be contained inside quotation marks.

Other Required Cmds: The FMTU command instructs the generator to use the new setting. The ALLU command updates hardware to the new setting

	and redraws the test image.
Example:	T E X T r e d 5 0 4 0 o p i x 9 " H E L L O W O R L D "
	/ / D r a w r e d " H E L L O W O R L D " a t x = 5 0
	/ / y = 4 0 i n o p i x 9 f o n t
TOBL	set levels relative TO BLanking
Classification:	Custom image primitive
Command Syntax:	None
Query Syntax:	None
Description:	Temporarily changes how the signal levels are determined for
	a given color intensity level. The default method uses black as
	the 0% reference level and peak video as the 100% level. Inserting
	TOBL moves the 0% reference point to the blanking (blacker
	than black) pedestal level. The reference point remains shifted
	only for as long as the image is displayed.
Other Required Cmds:	None
Example:	TOBL

6-168 Chapter 6: Programming Model 801GC, 801GF & 801GX¥Rev. A