Measurement Computing Analyzer488 - Manual (Page 152)

Section 4 Serial Controller
4.58
READ
The READ command is used to accept data from the bus when in the Low Level
Controller Mode and return a machine readable bus status string.
READ may only be used when the Analyzer488 is in the Listen State (see
LISTEN ) and handshaking is set to STEP (see HANDSHAKE). READ performs an
acceptor handshake. The STEP command is not required when using the READ
command since the handshake is automatically performed when READ is executed.
This command does not have a query option.
TYPE Low Level Controller command
SYNTAX READ
RESPONSE Response is dependent on the data currently on the bus. Two
hexadecimal bytes are returned in the following format:
Hex Byte 1 Hex Byte 2
(bit positions) (bit positions)
(Control and Handshake Lines) (Data Lines)
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
REN IFC SRQ EOI DAV NRFD NDAC ATN D8 D1
MODE Low level controller
BUS STATES None
QUERY None
RESPONSE
EXAMPLES PRINT#1,"CONTROLLER OFF"
PRINT#1,"ASSERT IFC ATN REN"
PRINT#1,"UNASSERT IFC"
PRINT#1,"TALK"
PRINT#1,"HANDSHAKE STEP"