Measurement-computing Serial488/4 Manuel d'utilisateur télécharger pdf (Page 69)

Section 3 Command Descriptions

3.30

Memory Query Z?

The Memory Query command returns the number of characters w hich may be

written to the serial ports w ithout causing a 'low memory' condition. This command

may be used to for determining how many more characters can be safely written to the

Serial488/4 before handshaking will attempt to stop serial input data because of a 'low

memory' condition.

Z?

Return the number of characters which may be written to the serial ports

Example 1: Find the amount of free memory remaining in the Serial488/4 using dual

primary addressing mode.

PRINT#1,"OUTPUT08;Z?" request amount of free memory

PRINT#1,"ENTER08"

INPUT#2,A$ read the response

PRINT A$

display shows

Z23456

Example 2: Find the amount of free memory remaining in the Serial488/4 using

secondary addressing mode.

PRINT#1,"OUTPUT0800;Z?"

request amount of free memory

PRINT#1,"ENTER0800"

INPUT#2,A$ read the response

PRINT A$

display shows

Z23456

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 90 91

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