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Chapter 6: Programming
Model 801GC, 801GF & 801GX¥Rev. A
DCEX
Display Code EXpected
Classification:
Format parameter setting
Command Syntax:
DCEX <code#>
Limits:
<code#>
0 = 0 0 0 0
8 = 1 0 0 0
1 = 0 0 0 1
9 = 1 0 0 1
2 = 0 0 1 0
10 = 1 0 1 0
3 = 0 0 1 1
11 = 1 0 1 1
4 = 0 1 0 0
12 = 1 1 0 0
5 = 0 1 0 1
13 = 1 1 0 1
6 = 0 1 1 0
14 = 1 1 1 0
7 = 0 1 1 1
15 = 1 1 1 1
Query Syntax:
DCEX?
Query Response:
<code#>
Description:
The DCEX command sets up the display code that’s expected
from a display connected to the generator. The code is determined
by one or more sense lines being connected to ground by the
display. Many video controller cards for the Apple Macintosh
II and VGA type cards for the IBM-PC sample the status of the
display code sense lines. The information then sets up one of
several different operating modes to match a particular display.
An improper display code may make the controller card or display
appear to malfunction.
The DCEX? query first performs a logical AND operation with
the display code bit mask and the actual display code that’s
sensed. The decimal equivalent of the result then is returned.
The mask is set with the DCEX command.
The expected setting and the actual result are both shown in
the Format test image. They have no effect how a given format
generates a set of test signals.
Other Required Cmds:
The FMTU command instructs the generator to use the new
setting. The ALLU command uses the new setting and redraws
the test image.
Example:
D C B M 7 / / S e t m a s k t o r e a d s e n s e l i n e s
/ / 0 , 1 & 2 o n l y
D C E X 5 / / O n l y l i n e s 0 a n d 1 s h o u l d b e
/ / g r o u n d e d
F M T U / / U p d a t e h a r d w a r e t o c u r r e n t
/ / b u f f e r c o n t e n t s
Содержание 801GC, 801GF, 801GX
Страница 1: ...Owner s and Programmer s Manual Model 801GC 801GF 801GX Portable Video Signal Generators ...
Страница 16: ...xiv Table of Contents Models 801GC 801GF 801GX Rev A Notes ...
Страница 17: ...1 1 Features Product Overview Chapter 1 Introduction ...
Страница 21: ...2 1 Operating Modes Displays Indicators Knobs Switches Buttons Chapter 2 Basic Operation ...
Страница 31: ...3 1 Introduction Format charts Chapter 3 Built In Formats ...
Страница 39: ...4 1 Description of the test images and how to use them Chapter 4 Built In Images ...
Страница 126: ...5 14 Chapter 5 Making Connections Model 801GC 801GF 801GX Rev A Notes ...
Страница 304: ...6 178 Chapter 6 Programming Model 801GC 801GF 801GX Rev A Notes ...
Страница 305: ...7 1 Power on Computer Interfacing If all else fails Chapter 7 Troubleshooting ...
Страница 309: ...8 1 System Errors Format Errors System Error Message Summary Format Error Message Summary Chapter 8 Error Messages ...
Страница 335: ...9 1 Chapter 9 Service New Product Warranty Product Updates Service Agreements Authorized Service Centers ...
Страница 346: ...A 6 Appendix A Specifications Model 801GC 801GF 801GX Rev A Notes ...
Страница 355: ...Notes ...