Measurement-computing Parallel488 Manual do Utilizador descarregar pdf (Página 27)

Section 4 IEEE to Parallel Operation

4.3

a logic "1" when there is 1024 or less locations in the buffer for data. It is

cleared, set to a logic "

", when there is greater than 2048 locations available.

This bit is referred to as the IEEE input buffer

FULL

bit.

4.3 Serial Poll Status Byte Register

The following shows and describes the serial poll status information provided by

the Parallel488.

Serial Poll Status Byte

Not Used - Al ways '0'

DIO8 DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1

1428163264128

IEEE Input Bu ffer Empty

Not Used - Al ways '0'

IEEE Input Bu ffer Full

Not Used - Al ways '0'

DIO8

Not Defined - Always "0"

DIO7

rsv - Always "0"

This bit is defined by the IEEE 488 Specification and is used to

indicate to the bus controller which device requires service. This bit

is not supported by the Parallel488.

DIO6

Not Defined - Always "0"

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Measurement-computing Parallel488 Manual do Utilizador Página 27