Plotter Interface Cable - Digital Equipment PDP-10 Manual

A DATA
a
instruction is sent to the plotter control logic and actuates the plotter. Following
this, a CONI reads the status gates of the control logic to determine whether or not the plotter is ready
to accept another command.
Tables 5-1 and 5-2 contain a functional description of the XY10 interface lines.
Signal Line
lOB 0 through lOB 35
lOB CONO CLEAR
lOB CONO SET
lOB CONI
lOB DATAO CLEAR
lOB DATAO SET
lOS 3(1) through lOS 9(0)
lOB RESET
lOB PI 1 through PI7
DATAO CLEAR
DATAO SET
Signal Line
PEN UP POSITIVE
PEN DOWN POSITIVE
CAR LT POSITIVE
Table 5-1
I/O Bus Interface Cable
Function
Used to transfer data and status information into the central
processor and control signal into the plotter control logic. In
the XYlO, only IOB30 through IOB35 are used.
Used to clear the BUSY and DONE flags and the PI register.
Occurs 1
fJS
after lOB CONO CLEAR. Used to gate the PI
channel number into the PI register and clear the DONE and/or
BUSY flags.
Used to gate plotter status into the central processor.
Clears the DONE flag, sets the BUSY flag and triggers
internal delays.
Occurs 1
fJS
after lOB DATAO CLEAR. Gates data into the
plotter control register.
Used to identify the device number to the plotter control logic.
Used to clear the plotter control logic.
Used to transfer the program interrupt signal to the central pro-
cessor. Only one line is assigned to the plotter at a time.
Clears the DONE flag, sets the BUSY flag, and triggers internal
delays •
Permits data to be loaded into the plotter function control
flip-flop register.
Table 5-2
Plotter Interface Cable
Function
Raises the plotter pen
Lowers the plotter pen
Moves the pen carriage one increment to the left
5-2