TM 5-6675-318-14
Table 3-2. SIGNAL LINES BETWEEN PLOTTER AND INTERFACE
Signal
Direction
(CMPTR
INTFC)
Function
Line
Description
DATA LINES
Carries I/O data, program
DI01-8
Data Input/Output
c o d e s , addresses and
status.
CONTROL LINES
I n d i c a t e s data or address
ATN
Attention
transmission.
Indicates
service
request.
SRQ
S e r v i c e Request
( Low = R e q u e s t )
Disables HP-IB Interface for
Interface Clear
IFC
bus .
( L o w = Clear)
EOI
Identifies end of data.
End or Identify
(Low = End)
Enables remote control
Remote Enable
REN
operation of plotter.
TRANSFER LINES
Indicates readiness to
NRFD
N o t Ready for Data
accept information.
(Low = Not Ready)
Indicates receipt of
NDAC
N o t , Data Accepted
information.
(Low = Not Ready)
Data Valid (Accepted) Indicates information
DAC
validity.
( L o w = Data Valid)
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