Measurement-computing Micro 488/EX rev.2.1 Manual de usuario descargar pdf (Pagina 116)

Section 5 Command Descriptions

5.46

MASK

The

MASK

command is used to mask the high bit (

MSB

) of serial input data. Some

serial host computers set the most significant bit when using eight bit serial data

lengths. When the

MASK

command is issued, each serial character received is

logically

AND

ed with

&H7F

(

127

decimal).

MASK

OFF

is the power-on default. In default operation, all serial input data is

automatically masked with

&H7F

. The exception to this is any data which follows a

semi-colon (

;

), an apostrophe (

) or a quotation mark (

). After a

MASK

command,

all characters are masked.

SYNTAX

MASK

{

OFF

}

RESPONSE None

MODE Any

BUS STATES None

EXAMPLE PRINT#1,"MASK ON"

1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 217 218

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Measurement-computing Micro 488/EX rev.2.1 Manual de usuario Pagina 116