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NET(5)			      File Formats Manual			NET(5)

NAME
       net - format of .net files read/written by Magic's netlist editor

DESCRIPTION
       Netlist	files are read and written by Magic's netlist editor in	a very
       simple  ASCII  format.	The  first  line   contains   the   characters
       ``  Netlist  File'' (the	leading	blank is important).  After that comes
       a blank line and	then the descriptions of one or	more nets.   Each  net
       contains	 one or	more lines, where each line contains a single terminal
       name.  The nets are separated by	blank lines.  Any line that  is	 blank
       or  whose first character is blank is considered	to be a	separator line
       and the rest of its contents are	ignored.

       Each terminal name is a path, much like a file path name	in  Unix.   It
       consists	of one or more fields separated	by slashes.  The last field in
       the path	is the name of a label in a cell.  The other fields (if	 any),
       are  cell instance identifiers that form	a path from the	edit cell down
       to the label.  The first	instance identifier must name a	subcell	of the
       edit cell, the second must be a subcell of the first, and so on.

       Instance	 identifiers are unique	within their parent cells, so a	termi-
       nal path	selects	a unique cell to contain the label.  However, the same
       label  may  appear  multiple  times within its cell.  When this occurs,
       Magic assumes that the identical	labels identify	 electrically  equiva-
       lent terminals; it will choose the closest of them when routing to that
       terminal.  Further, after connecting to one of  these  terminals	 Magic
       may  take advantage of the internal wiring connecting them together and
       route through a cell to complete	the net's wiring.

       An example netlist file follows	below.	 It  contains  three  distinct
       nets.

       ----------------------------------------
	       Netlist File

	      alu/bit_1/cout
	      alu/bit_2/cin

	      regcell[21,2]/output
	      latch[2]/input
	       This line starts	with a blank, so it's a	separator.
	      opcode_pla/out6
	      shifter/drivers/shift2
       ----------------------------------------

SEE ALSO
       magic(1)

4th Berkeley Distribution						NET(5)

NAME | DESCRIPTION | SEE ALSO

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