ZLSA - LS11 line printer test

	ABSTRACT:
		This program verifies proper operation of the Centronics line printer and associated control unit.

	HARDWARE REQUIREMENTS:
		PDP-11 CPU, 8 KW memory, console terminal.

	SOFTWARE:
		Error printout is as follows:

			PC=''xxxxx''   error message

		where xxxxx= is octal value of the program counter at the time of error.
		Error message: see listing.

	OPERATING PROCEDURES:
		The program is started at 200. It may be restarted at 600 after appropriate switch settings (if any) have been selected.

	SWITCH SETTINGS:
		SW 15	=1  halt on error
		SW 14	=1  scope loop
		SW 13	=1  inhibit error printout
		SW 12	=1  select ''print time free'' pulse generator
		SW 10	=1  elongation on SWR input test (see listing)
		SW 09	=1  selection of a particular test
		SW 08	=1  select manual intervention
		SW 07-00    contains the test (used with SW 09)

	RUN TIME:
		1 pass takes approximately 5 min.

	NOTES:
		Worse case (all switches down) takes a run time of approximately 11 min.