Usage: glas [options] [file]

Options:
  -o <name>  Set output file name. [a.ulx]
  -l         Turn on listing mode. [false]
  -n         Don't patch the ROM header. [false]
  -L         Output label addresses. [false]

Syntax: 
;	end-of-line comment
/*...*/ block comments (unnestable)
:	statement separator for statements on the same line
`x	evaluates to the character code of the character x

Addressing modes:
	#	Immediate (sign extended)
	^	Immediate (sign extended)  (synonym for #)
	@	Memory direct
	&	Locals direct
	*	RAM direct

Addressing mode size selectors:
	.l	(long)  32 bit data
	.w	(word)  32 bit data (synonym for .l)
	.s	(short) 16 bit data
	.b	(byte)   8 bit data

Special symbols:
	.	 Current address
	..	 Address of next statement
	...	 Address of statement following next statement
	RAMSTART Address of start of RAM
	EXTSTART Address of start of EXTMEM

Default addressing modes:
	Local_var	-> &
	Label_in_ROM	-> @
	Label_in_RAM	-> *
	Label_in_BSS	-> *
	EXPRESSION	-> #

Special offseting of operands consisting of a single label:
	*label		-> *label-RAMSTART
	#label		-> #label+2-..		; only relative branch operands

String escapes:
	Escape	Decimal	Octal	Name
	\b	 8	010	backspace
	\t	 9	011	tab
	\n	10	012	linefeed
	\f	12	014	formfeed
	\r	13	015	carriage return
	\"	34	042	doublequote
	\\	92	134	backslash
	\ddd		ddd	precisely three OCTAL digits of
				a Latin-1 character code

Pseudo-ops and directives:

.align	 BOUNDARY [,FILL-VALUE]		Pad to alignment BOUNDARY
.ascic	 STRING1, STRING2, ...		Assemble byte counted strings
.ascicb	 STRING1, STRING2, ...		Assemble byte counted strings
.ascicl	 STRING1, STRING2, ...		Assemble long counted strings
.ascics	 STRING1, STRING2, ...		Assemble short counted strings
.ascicw	 STRING1, STRING2, ...		Assemble long counted strings
.ascii	 STRING1, STRING2, ...		Assemble ascii strings
.asciz	 STRING1, STRING2, ...		Assemble C-strings
.aux	 NAME [,RAM|ROM|BSS]		Create/select string data section NAME
.auxstr	 0|1|2|4|240|0xE0		Set default string data type
.bss	 NAME [,RAM|ROM|BSS]		Create/select common section NAME
.byte	 EXP1, EXP2, ...		Assemble bytes
.comm	 NAME, NBYTES [,ALIGNMENT]	Create named buffer in common section
.commb	 NAME1, NAME2, ...		Create named byte variables in common
.comml	 NAME1, NAME2, ...		Create named long variables in common
.comms	 NAME1, NAME2, ...		Create named short variables in common
.commw	 NAME1, NAME2, ...		Create named long variables in common
.end					Stop reading input source
NAME .equ EXPR				Irrevocably make NAME expand to EXPR
.err	 STRING1, STRING2, ...		Print strings and flag an error
.errif	 CONDITION, STRING1, STRING2, ... Cause action of .err if CONDITION
local	 NAME1, NAME2, ...		Start/continue declaring long locals
localb	 NAME1, NAME2, ...		Start/continue declaring byte locals
locall	 NAME1, NAME2, ...		Start/continue declaring long locals
locals	 NAME1, NAME2, ...		Start/continue declaring short locals
localw	 NAME1, NAME2, ...		Start/continue declaring long locals
.long	 EXP1, EXP2, ...		Assemble longs
.org	 OFS [,FILL-VALUE]		Pad to OFS from start of section
.orgabs	 ADDR [,FILL-VALUE]		Pad to absolute address ADDR
.print	 STRING1, STRING2, ...		Print strings
.prn	 STRING1, STRING2, ...		Print strings
.sec	 NAME [,RAM|ROM|BSS]		Create/select current section NAME
.section NAME [,RAM|ROM|BSS]		Create/select current section NAME
NAME .set EXPR				Revocably make NAME expand to EXPR
.short	 EXP1, EXP2, ...		Assemble shorts
.space	 NBYTES [,FILL-VALUE]		Pad with NBYTES bytes of FILL-VALUE
.string	 STRING1, STRING2, ...		Assemble E0-type strings
.word	 EXP1, EXP2, ...		Assemble longs