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Page 18 Model 801GC-ISA & 801GF-ISA Programming Manual

DCBM <mask>

Limits: <mask>

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 10

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

Description: The DCBM command sets the 4-bit binary bit mask used by the DCEX? query. The DCBM?

query returns the current setting of DCBM.

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

Description: The DCEX command sets up the display code that is 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

is then used to set-up one of several different operating modes to match a particualr display.

An improper display code may make the controller card or display appear to be

malfunctioning. The “Making Connection” chapter has information on display codes that are

used by some systems.

The DCEX? query first performs a logical AND operation with the display code bit mask and

the actual display code that is sensed. The decimal equivalent of the result is then 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.

DCRD?

Query Response: <code#>

Description: Returns mask display code read from monitor sense leads.

DNUM <mode>

Limits: <mode>

0 = Disable

1 = Enable

Description: Command enables/disables sequence step number display. Query returns the current step

number display mode.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 39 40

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