Mods to mac by Bill Hollier for cruddy non-byte machines
and souped-up PDP-8's which don't have immediate instructions.

run options

	-w	listing in 'word' format - ie one word per listing line
	-f	listing in 'field' format - split up into the format
		string units. Useful for your 'classical' 1 1/2 address
		index register machine (like DEC10 say, but squeezing
		36 bits into 16 might be fun!). Also like CM202 assembler
		listing format, and useful for debugging D-files.
	-i	listing in 'instruction' format - one instruction
		listed per source line  - how it used to be, bugs 'n' all.

Literal pools

	=<constant expr>	put a magic entry with no name but
		a value and the flag bit 'LITR' in the symbol table. At the
		moment there is nothing else done with them - they just
		sit there and never even get put in the m.out file.
		Mainly for the CM202.

Mods to mac by Peter Lamb to make org's nicer

	There are no visible changes

prl again - listing control

	pseudo's 'list' and 'nlist' have been added. They don't nest
	(i.e. nlist turns off listings no matter how many preceding
	lists) but that could be changed easily.

		Peter Lamb
		Comp. Sci.
		Melb. Uni.

prl again - somewhat later

	pseudo 'include' added. acts like 'C' #include, but only
	searches the given pathname. I.e. doesn't search /usr/include.

	include	"file"	;is how it's used

