my $regex = qr{
	(?<intplus> (?&INT) (?&SOMETHING)+ (?&QUOT)? )
	| (?<intonly> (?&INT) (?&QUOT)? )
	| (?<regonly> \b(?:E?A[XHL])=[0-9A-Fa-f]{2,}[Hh]?
		(?&SOMETHING)* (?&QUOT)? )
	| (?<table> \#[0-9A-Z][0-9]{4}\b)
	| (?<mem_16_16> \bMEM\s?(?&HEX4):(?&HEX4) (?&QUOT)? )
	| (?<mem_32> \bMEM\s?[0-9A-Fa-fXx]{1,8}[Hh]? (?&QUOT)? )
	| (?<call> \@(?&HEX4):(?&HEX4) (?&QUOT)? )
	| (?<portrange> \bPORT\s?(?&HEX4)-(?&HEX4) (?&QUOT)? )
	| (?<portsingle> \bPORT\s?(?&HEX4) (?&QUOT)? )
	(?(DEFINE)
		(?<INT> \bINT\s?[0-9A-Fa-f]{2}[Hh]? )
		(?<HEX4> [0-9A-Fa-fXx]{1,4}[Hh]? )
		(?<QUOT> (?:\"[^"]+\") )
		(?<SOMETHING>
			\/(?:E?[ABCD][XHL]|E?[SD]I|E?[SB]P|[DESC]S)=[0-9A-Fa-f]{2,}[Hh]? )
	)
}x;