NAME
	xfdPatch 1.02

SYNOPSIS
	xfdPatch REMOVE/S,CHIP/S,FAST/S,DEFAULT/S,NE=NOEXTERN/S

DESCRIPTION
	xfdPatch patches the dos.library/[New]LoadSeg() vectors in
	order to avoid that the decrunch headers of crunched programs
	are executed. This is indeed very useful as some old decrunch
	headers will not work correctly with new OS versions or are
	written quite badly. xfdPatch requires Kickstart v37+.

	With xfdPatch, [New]LoadSeg() will first check the loaded
	segment list for decrunch headers known by xfdmaster.library.
	If nothing is found, then everything works as usual. But if a
	decrunch header has been recognized, the xfdDecrunchSegment()
	function will be called and the decrunched segment list is
	passed back as the result of [New]LoadSeg().

	On the user level, you will in most cases simply notice that
	the annoying color/LED flashing of most decrunchers has been
	disappeared. This shows you that xfdPatch works correctly.

	Please note that xfdPatch currently doesn't support password
	or key requests and therefore simply passes on such files to
	the calling program.

	If there should ever be a reason to remove xfdPatch from
	memory, use the REMOVE option to do this. Please note that
	xfdPatch cannot be removed if another program has changed the
	dos vectors in the meantime.

	Most segment decrunchers in the xfdmaster.library support
	so-called relocation modes which means that you can force the
	segments to be relocated to a special type of memory. With
	CHIP and FAST, you can force segments to chip or fast memory,
	DEFAULT causes xfdPatch to use the memory types given within
	the hunks. Note that these attributes are only used while
	decrunching, uncrunched files cannot be relocated somewhere
	else. These options are useful with old games or intros that
	need chipram but don't have the correct attributes set in the
	hunk header.

	With NOEXTERN, you can forbid the use of external slaves for
	the recognition and decrunching of segments. This will be of
	very rare use as there currently doesn't exist any external
	segment decruncher as far as I know.

TECHNICAL INFO
	This section is especially written for programmers of system
	monitors or antivirus programs. It tells you how to detect
	xfdPatch in memory.

	First of all, if xfdPatch is installed, both the NewLoadSeg()
	and LoadSeg() vectors of dos.library point to the following
	piece of code:

	            dc.l   "XFDP"
	JumpIn      ...

	Second, there exists a port called 'xfdPatch.rendezvous'.
	The fields of this port are all private, so just test if the
	port exists and nothing else.

HISTORY
	xfdPatch 1.02
	- Added option NOEXTERN.

	xfdPatch 1.01
	- Added options CHIP, FAST and DEFAULT.

	xfdPatch 1.00
	- First public release. I used a very simple version of this
	  program for testing purposes for about one year now.
	  But why not giving it to the public?

COPYRIGHT
	xfdPatch is freely distributable for noncommercial use.

AUTHOR
	Georg Hörmann
	Martinswinkelstraße 16c
	82467 Garmisch-Partenkirchen
	Germany