path: root/doc/ports/alliant_86.doc

Notes on the port of IRAF V2.3+ to the Alliant FX vector workstation,
beginning 25 August 1986 (dct).  This is a continuation of a port started
by Dennis Crabtree on 12 August, with some of the problems found then being
fixed before the bootstrap or sysgen in this port.
---------------------------------------------------------------------------

Read tape onto VAX 780 using IRAF `reblock' task.  Worked great, except
	that I allocated the drive in vms before running IRAF: this caused
	the IRAF allocate to fail, causing a read error on the first
	attempt to run reblock (confusing).  (8/25)

Copied archive to the Alliant via the ethernet which runs the Excelan
	network software.  The first attempt to unpack the archive on the
	Alliant failed with a checksum error message from tar; this turned
	out to be due to not specifying a binary transfer in TELNET before
	copying the file (a newline was being inserted after every 512
	bytes).  After retransmission to fix this, unpacked everything
	successfully at /u2/iraf. (8/25)

Notes -
	There is a bug in the Excelan network software that causes it to
	hang up the terminal if too many characters are transmitted,
	forcing one to login on another terminal and STOP the process.

	The Alliant died on a kernel panic (mfree failure) during one
	of these network crashes and had to be rebooted.  Another time
	it hung up in a hard loop when tyring to delete the large archive
	file (bad disk block?) and had to be rebooted.

	DAO uses Plessey PT-100G graphics terminals.  These have an awful
	keyboard with keybounce and keylost problems.  A screen redraw takes
	3 seconds.  The screen color is orange - not as bright as amber,
	green, or white.  Other than that they seem fine - have not tried out
	the graphics yet.  (8/25)

	Tried the graphics finally, on VMS/IRAF.  The graphics resolution is
	good (480x1000?) and vector drawing is fast.  Hardware cursor setting
	is better than on the vt640 (shift and ctrl as used as accelerators,
	and 45 degree motions are supported), but unfortunately there is no
	software write cursor function, so the HJKL and other cursor write
	features (as in in a zoom) do not work.  The alpha and graphics
	memories are separate and can be displayed together, as on the vt640.

	The main problems of this terminal are the keyboard, slow screen
	redraw, and lack of a software write cursor function (but it is
	better than a vt240!).  (8/30)

local/.login
	Set up the .login for the new system.  (8/25)

Notes -
	Tried using the vms COPY to copy the tar file to disk, to see if
	that would work.  COPY produced a variable length, 10240 byte max
	record length, carriage control etc. file as output, i.e., a text
	file.  This explains why the initial attempt to read the tar tape
	failed.  Probably the best way to distribute tar archives to VMS
	sites is by making a BACKUP tape of a disk tar file.  This avoids
	this type of confusion, and also gains access to the error recovery
	provided by BACKUP.  (8/26)

/usr/include/iraf.h
/usr/bin/cl,mkiraf,etc.
	Changed to point to /u2/.  (8/26)

unix/hlib/[dir]mach.f
	Commented out pdp-11 entries and uncommented IEEE entries.  In two of
	the files, commented out the call to ILIBER; I don't think we want
	that (should be fixed on Lyra).  (8/26)

unix/hlib/iraf.h
unix/hlib/mach.h
	Changed the values of epsilonr, epsilond to the IEEE values.  Set the
	byte swap flags to NO.  (8/26)

unix/hlib/iraf.h
	Set defines for and,or,xor to iand,ior,ieor.  Not is not.  (8/26)

unix/hlib/mkiraf.csh
	Changed iraf root directory to /u2/iraf.  (8/26)

unix/hlib/mkpkg.inc
	Set siteid to `dao', turned off ncar, calcomp kernels.  XC flags will
	probably also have to be changed, but leave that for later.  (8/26)

unix/as/zsvjmp.s
unix/hlib/config.h
unix/hlib/libc/spp.h
	Wrote the ZSVJMP/ZDOJMP for the Alliant (as$zsvjmp.s), and set the
	jump buffer size parameters in config.h and spp.h.  The current routine
	saves the exception mask and all the floating point and vector
	registers as well as the 68000 registers, which is more than is really
	necessary.  (8/26)

unix/os/zgtime.c
unix/os/gmttolst.c
unix/boot/bootlib/ostime.c
	From looking at Dennis's notes I see that time.h is in <sys/time.h>
	rather than <time.h> on the Alliant.  In fact it is referenced both
	ways in the VAX/UNIX kernel, so I changed all references to
	<sys/time.h>, don't know what the official answer to this one is.
	Removed the link (added by Dennis) in /usr/include.  (8/26)

unix/hlib/libc/iraf.h
unix/os/zxwhen.c
	In iraf.h, added a #define ALLIANT for use in HSI code.  In zxwhen,
	replaced the array of vax exceptions by an #ifdef-ed array of
	alliant specific hardware exceptions (hwx_).  (8/26)

unix/os/zxwhen.c
	The Alliant C compiler produced a syntax error for the declaration
	for the pointer to function `vector'.  Presumably this was due to
	vector being a reserved keyword to the Alliant C compiler; changed
	the name to `vvector' and it compiled.  (8/26)

unix/boot/spp/xc.c
	Replaced f77 by the Alliant task `fortran' (the Alliant Fortran
	compiler) to compile Fortran files.  Modified to use cc rather
	than f77 to compile all other files.  Modified to add the .f
	files produced from .x sources to the Fortran file list, rather
	than the general source file list input to the C compiler (formerly
	these files were processed by f77, which can compile anything).
	Parameterized the names of the fortran compiler, the C compiler,
	and the linker.  Deleted the "-u" flag, which is not supported on
	the Alliant.  Changed the Fortran library name from `-lF77' to
	`-lfortran'.  (8/26)

	In the long run, XC needs to be rewritten to be more portable,
	like mkpkg.  This is still the original unix compiler, which was
	never intended to be ported.

unix/boot/spp/rpp/ratlibf/Makefile
unix/boot/spp/rpp/rppfor/Makefile
	Modified to call `fortran' rather than `f77'.  (8/26)

---------------------------
(first attempt to bootstrap)

unix/os/zfiomt.c
	C compiler error.  The declaration of the automatic array in
	the skip record forward function, i.e.,

		char	buf[32768];

	caused the fatal error `too many local variables' from the
	C compiler.  I reduced the size to [28800].  Recall that this
	used to be a small buffer, but I had to make it larger than the
	maximum tape block size to avoid i/o errors on the SUNs.  Use
	of malloc is undesirable since skip record forward might be
	called many times in a loop.  In any case, this is an indication
	that the Alliant C compiler has limited symbol table storage and
	may have problems with large programs or modules.  (8/27)

Note on Alliant Fortran compiler (task `fortran').
	The compiler cannot handle a "-cO" flag on the command line.
	The "-O" must be given as a separate flag.  (8/27)

unix/boot/spp/rpp/ratlibf/dsfree.f
	On line 20, the hollerith string contained a tab instead of a space,
	causing the line length to exceed 20 characters.  (8/27)

unix/boot/bootlib/mkpkg.csh
	The executable nature of this .csh is a nusiance; a different way
	should be found to do this.  (8/27)

unix/hlib/mkpkg.inc
	Changed the default compile flags to "-c -Ovg -AS -OM" for the Alliant.
	(8/27)

---------------------------
(bootstrap completed)

unix/hlib/alloc.e
	Changed owner to root.  (8/27)

sys/gio/gki/gkigca.x
	The min() instrinsic function was being called with operands of mixed
	type, i.e., int and short.  Restructured so that both operands were of
	type int.  (8/27)

sys/gio/gki/gkigca.x
	In this case, the Alliant compiler found a real bug in a module.
	The warning message `subscript out of range' was being produced
	because Mems[] was being referenced with a compile time constant
	subscript, caused by omission of the pointer variable from the
	expression.  The bug was harmless, however, since the affected
	argument (the device name string) was not being used by the called
	procedure (close workstation).  (8/27)

sys/vops/lz/mkpkg
	Added $checkout libvops.a, etc., to the file header.  (8/27)

sys/vops/ak/*.x
sys/vops/lz/*.x
unix/boot/generic/generic.c
	The Alliant fortran compiler complains about use of (0,0) as a
	complex constant.  This string is generated by the generic
	preprocessor when the sequence 0$f is encountered (actually,
	any sequence NN$f is permitted).  Modified the generic preprocessor
	to turn NN$f into (NN.0,NN.0) for the complex datatype, and
	deleted all the complex files (and associated integer files) in ak
	and lz containing the string (0,0).  These will be automatically
	regenerated by the preprocessor in the sysgen provided the integer
	family member is not found - the mkpkg only checks the date (and
	existence) of the integer file.  (8/27)

pkg/system/help/t_lroff.x
	Added an extern declaration for `getline', since it is passed by name
	to the lroff function.  (8/27)

pkg/cl/task.h
	In the #define next_task, deleted the (unsigned) coercion.  This should
	not be necessary as a pointer is already an unsigned quantity, and the
	Alliant C compiler would fail with the message

		`expression causes compiler loop: try simplifying'

	when trying to compile the file (although the same macro was used in
	lots of other places without problems - maybe it was causing parser
	stack overflow in the problem cases, due to a complex context).  (8/27)

unix/hlib/mkpkg.inc
sys/vops/mkpkg
	As an experiment, added a new environment variable XVFLAGS to
	mkpkg.inc; this is used when compiling vectorized code to get
	whatever compiler options are desirable for such code.  Added
	a $set to the vops mkpkg to redefine XFLAGS as XVFLAGS so that
	the vops package will be compiled for vectorization.  At present,
	the value of XVFLAGS is the same as XFLAGS, i.e., vectorization
	is permitted in both cases, except that the vectorization warning
	messages are not turned off by the XVFLAGS.  (8/27)

---------------------------
(started the first full system sysgen)

sys/gio/gki/gkiopen.x
sys/gio/gki/gkititle.x
	More `subscript out of bounds' errors, caused by omission of the
	pointer `gki' from gki instruction field references.  (8/27)

sys/fio/osfnlock.x
	The procedure osfn_initlock was declared as an integer function but
	the return value was never set, causing the fortran compiler to
	complain `FUNCTION return value is not defined in this program unit'.
	It turns out that the procedure is called as a subroutine everywhere,
	so evidently the function declaration was not intended.  Changed it
	to a subroutine.  So far, the Alliant fortran compiler is finding
	more bugs in IRAF than IRAF is finding bugs in the compiler, a pleasant
	turn of affairs.  (8/27)

sys/vops/amap.gx
	Broke the min/max expression in the do loop up into two statements
	to defeat a compiler warning message for case short; an integer
	expression was being used as one of the min/max operands for case
	short.  (8/27)

unix/boot/generic/tok.l
	The external string variable xtype_string[] was declared as (char *)
	rather than (char []) in tok.l, causing a runtime bus error on the
	Alliant.  This construct works on the VAX because the linker is smart
	enough to figure out what is going on, but clearly the construct is
	not portable and should be avoided.  Probably it is always safe to
	use (char *) in argument lists since a pointer value is always pushed
	on the stack, but in extern declarations the array notatio must be
	used.  (8/27)

sys/osb/mkpkg
sys/osb/achtb.gc
sys/osb/achtu.gc
sys/osb/achtzb.gc
sys/osb/achtzu.gc
	A warning message from the C compiler led to the disovery of some
	old complex ACHT procedures in OSB.  There was a bug in these files
	which had been fixed in the source .gc files, but type X had been
	removed from the call to generic in the mkpkg, hence the complex
	files were never regenerated.  It appears that type complex was dropped
	at some point from the mkpkg, but the complex files were never
	deleted.  The other file are more permissive with type coercion,
	hence the problem was never discovered.  I restored type complex to
	the mkpkg and added a complex case (requires special processing) to
	each of the .gc files.  (8/27)

sys/gio/ncarutil/sysint/ishift.x
	This file contains source for two procedures IAND and IOR.  This would
	not compile since the Fortran compiler already has intrinsic functions
	with the same names; commented the offending procedures out as a
	workaround.  (8/27)

sys/ki/irafks.x
	The procedure `kserver' was declared as a function but the return
	value was never set, and the function was being called as a
	subroutine.  Changed to a subroutine.  (8/27)

math/iminterp/arider.x
	This file contained the three procedures ii_pcpoly3, ii_pcpoly5,
	and ii_pcspline3.  These were all declared as functions had no
	return values and were always called as subroutines, hence I changed
	them to subroutines.  Also, the same external names were used with
	a different argument list in the file `mrider.x', leading to a very
	serious library conflict - surprised it has not caused noticeable
	runtime problems to date.  As a temporary solution,  I changed the
	names to ia_* in the file arider.x to avoid this library conflict.
	(8/27)

pkg/xtools/icfit/icgdelete.gx
pkg/xtools/icfit/icgundelete.gx
pkg/onedspec/identify/icfit/icgdelete.gx
pkg/onedspec/identify/icfit/icgundelete.gx
	Each file contained two procedures which were declared as functions
	but which did not return function values and which were called as
	subroutines, hence I changed them to subroutines.  (8/27)

pkg/images/imdebug/immake.x
	Subroutine immake2 declared as a function.  (8/27)

pkg/images/tv/display/iiswnd.x
	Contained constructs such as `max (0, lut[i])', where `lut' is a short
	integer array.  This caused a min/max type mismatch error.  Also, a
	statement had a nonfunctional C like ; at the end.  (8/27)

pkg/images/tv/cv/iism70/iishisto.x
	Same problem, short integer variable `offset'.  (8/27)

pkg/images/geometry/blkav.gx
	Main procedure blkav$t declared as a function but used as a subroutine
	everywhere.  (8/27)

pkg/plot/gkiextract.x
	In gke_make_index, `nchars_max = min...', contained an integer constant
	and a short integer array element, causing a min/max argument type
	mismatch.  (8/27)

noao/onedspec/t_dispcor.x
	Procedure dcorrect declared as a function is really a subroutine.
	Also, it has a ridiculously large number of arguments.  (8/27)

---------------------------
(All compile time bugs found in this pass fixed.  Stripped all non-HSI
(binaries and started another full sysgen to run overnight).

kernel problems
	When I came in in the morning the sysgen had completed successfully,
	but the machine seemed rather sluggish.  Trying to work, I immediately
	found that processes which used to run would hang up on a pseudo-run
	state, completely uninterruptable, sometimes unstoppable, unkillable,
	and so on.  Clearly a problem with the unix kernel, so I rebooted and
	the symptoms went away.  Most likely this was a bug in the Alliant
	unix kernel, which is common with new unix ports.  (8/28)

math/interp/arider.x [OBSOLETE]
	Missed one: the three procedures iidr_poly[35] and iidr_spline3 were
	declared as functions but were really subroutines.  (8/28)

pkg/images/tv/cv/iism70/iisrange.x
	Lots of problems mixing int and short in calls to AND, OR.  (8/28)

pkg/images/tv/cv/iism70/zsnap.x
	This module caused the fortran compiler to core dump with an internal
	error; it was trying to resolve mixed int/short operands in expressions
	and couldn't handle this code, evidently.  (I feel much the same way
	trying to read it.)

	Deleted `int min(), max()' intrinsic function declarations.  Added an
	itemp temporary to fix a couple min/max statements which mixed int
	and short operands.  (8/28)

pkg/images/tv/cv/iism70/iishisto.x
	Lots and lots of compile time problems with short variables - took
	several iterations to find them all.  (8/28)

pkg/images/imarith/imsum.x
	In module MXMNSS, the Fortran compiler coredumps when run with
	global optimization (-Og).  Returns `error code 138': examination
	of the corefile for `fortran1' (the first pass I presume) with adb
	gives the reason as `bus-error page violation'.  Saved the offending
	segment of code in local$bugs for a bug report to Alliant, and compiled
	the routine without optimization.  (8/28)

noao/mtlocal/cyber/cy_rbits.x
	This file also causes the Fortran compiler to coredump and return
	error code 138 - bus error page violation.  Generated the minimum
	Fortran module that would demonstrate the bug and installed it in
	local$bugs.  Hand compiled routine without optimization.  (8/28)

noao/mtlocal/cyber/cyber.h, *.x
	The data structure for this package included a field named POINTER.
	This is a reserved keyword, and is converted by the preprocessor
	into `int', eventually causing a compile time error on the Alliant
	(and a memory overwrite problem on the VAX).  Aside from being a
	reserved keyword, POINTER is not a very illuminating name for a
	field of a structure: pointer to what?  After a little investigation,
	changed the name to COEFF, since it appears that the field contains
	a pointer to some sort of coefficient array.  (8/28)

---------------------------
All compile time problems have now been dealt with and all executables linked
and installed in bin.  I tried running a couple of the executables, and
incredibly, they ran without apparent error on the first attempt!  Of course,
that is too good to be true, the next step is runtime testing of the system.

dev/graphcap
dev/termcap
	Installed the local DAO additions to termcap and graphcap.  Rather
	than have a modified version of the vt640 entry for DAO, changed the
	name of the new logical device to vt640d.  (8/28)

unix/hlib/mkiraf.csh
	Set the default image storage directory to /u2 since it will be
	empty when iraf is moved back to /iraf, and since there does not
	seem to be any dedicated scratch area.  Added a comment for the
	pt100g graphics terminal.  (8/28)

unix/hlib/zzsetenv.def
	Changed the names of the stdgraph and terminal devices to `pt100g'.
	Did not set stdplot, stdimage, printer, since no such devices are
	currently available from the Alliant.  (8/28)

local/login.cl
	Ran `mkiraf' to set up a new CL login for IRAF.  Tried starting the
	CL and it hung up in pseudo-run mode as above.  The problem is
	definitely in the unix kernel, but it appears likely that the bug
	occurs when an IRAF VOS (not HSI) process runs - possibly it is
	related to the call to the internal Alliant `setcontext' routine
	(which traps to the kernel), called from ZSVJMP.  The system slows
	way down when this occurs, so evidently it is hung in some sort of
	tight kernel loop.  (8/28)

(rebooted)

process spawn problem
	This is turning out to be a hard problem to locate.  ZSVJMP turned
	out not to be the problem, and in fact it works fine.  The difference
	between the IRAF processes and the UNIX processes is that the IRAF
	processes use the fancy vector compiler.  The Alliant process header
	contains a flag bit word describing the attributes of the process to
	be run; the standard UNIX processes do not use any of the fancy
	Alliant vector stuff, and in fact do not even use 68020 instructions.
	The IRAF processes use 68020 instructions, vector instructions,
	and something called multiple stacks.  Once the kernel gets corrupted,
	processes with these attributes enter the pseudo-run state when we try
	to exec them.  (8/29)

(rebooted countless times)

unix/os/zfiopr.c
	After a lengthy battle, finally determined that due to some bug in
	the Alliant kernel, ONLY A NORMAL PROCESS CAN EXEC A VECTOR PROCESS.
	A vector process can exec a normal process with no problem, and a
	normal process can exec a normal process, but if a vector process
	execs a vector process the exec hangs in a tight kernel loop.
	The workaround is for the vector process to exec a normal process
	and have it turn around and exec the desired vector process.
	I tried this, and it works, although there appear to be other less
	serious bugs with IPC to be faced tomorrow.  (8/29)

	[8/30 - IPC bug was not a real bug, just caused by "-c" switch not
	[being passed to connected subprocess by `execute'.]

unix/os/exec.c +
unix/hlib/exec.e +
unix/os/zfiopr.c
unix/os/mkpkg.csh
unix/os/mkpkg
	Resolved the process connect problem as follows: [1] added a new
	file exec.c (source for hlib$exec.e), which compiles into a nonvector
	process to be called by the CL to spawn vector subprocesses;
	[2] replaced the execl call in zfiopr.c/ZOPCPR by a call to execve
	to spawn hlib$exec.e, which in turn spawns the IRAF suprocess.
	Added entries to the mkpkg files to make the new modules.  (8/30)

--------------------------------------
ALLIANT/IRAF is now up and ready for runtime testing, Saturday morning,
30 August.  Spent two days on the port and one and a half days figuring
out the process connect problem.

unix/hlib/iraf.h
unix/hlib/mach.h
	In checking out some operations upon indefinites, discovered that
	the values of INDEFR and INDEFD in <iraf.h> had accidentally been
	set to the values of EPSILON[RD].  This was causing INDEF comparison
	failures for files that included <mach.h> since INDEF is also defined
	there.  INDEF should not be defined in <mach.h> if it is already
	defined in <iraf.h>, so I deleted the entries in <mach.h> and restored
	the old values to <iraf.h>.  (8/30)

unix/as/zsvjmp.s
	Discovered a minor problem with the new ZDOJMP routine.  The address
	of the error code was being returned, rather than the value, causing
	error messages to come out as ERROR (*****, "..").  (8/30)

(full sysgen and relink due to <iraf.h> and zsvjmp edits)

Fatal Alliant hardware problem
	Right away when trying to test out the IRAF science software I
	ran into serious problems with floating point operations.  A little
	investigation showed that the Alliant floating point hardware is
	faulty.  Simple test programs were written in both Fortran and C to
	print out the numbers 1.0, 2.0, 3.0: both failed.  Testing of the
	floating point instructions with ADB revealed that add and subtract
	are ok, but 1.0 * 2.0 is 2.1375, and 1.0 / 2.0 is 0.53125.  A simple
	board swap should fix the problem (in fact it is probably a single
	chip), but unfortunately this will prevent further testing of the
	science software during this visit; virtually all programs that use
	floating point produce invalid results, including all graphics
	programs.  Testing of the system software can continue, as can
	execution of most benchmark programs.  (8/30)

	IMPORTANT NOTE -- Once this problem is fixed it will be necessary to
	recompile the entire system (and any other non-IRAF software as well),
	since any floating point decode operations performed by the compilers
	will likely have failed, causing invalid floating point numbers to be
	compiled into programs.  Hence these programs will fail even after the
	hardware is fixed.

unix/os/zopdpr.c
	Had to make the same change here as in zfiopr.c, i.e., add a call to
	the intermediate `exec.e' process to exec the bkg cl.  Note that this
	is not necessary for zoscmd, since zoscmd execs one of the unix
	shells, both of which are nonvector processes.  (8/31)

Note on FTP
vms/boot/rtar
	A binary file transfer via FTP to VMS resulted in creation of a file
	with an undefined record type.  Trying to unpack this file with RTAR
	would immediately crash the VAX due to an exexpected exception during
	a system call in the ACP (RMS).  This should not happen, of course,
	but the real question is why FTP created a file with an undefined
	record type.  Sure would be nice to have the IRAF networking software
	up...  (9/1)

unix/os/zgtime.c
unix/hlib/libc/kernel.h (HZ)
sys/etc/sysptime.x
	Rewrote the timer utility routines to use only integer arithmetic,
	so that I could run some benchmarks of the vector hardware.  (9/1)

(relink)

--------------------
Timing tests
	The Alliant documentation claims that use of the vector hardware will
	increase performance by about a factor of 4.  This is borne out by my
	tests.  The factor of 4 is determined by the ratio of the startup
	time for a vector segment versus the time required to execute a
	vector segment, where the segment length (number of elements in a
	vector register) is 32 for the Alliant.

	aaddr, 512x512
		vectorized:	0.184 cpu
		nonvector:	0.617 cpu

(Moved new system to /iraf; deleted old system, it should be archived
(somewhere and probably won't be looked at again anyhow.  I saved a copy
(of the original Alliant notes file as notes.den.  Modified the links in
(/usr/include and /usr/bin to point to /iraf.  Modified the pathnames in
(hlib and hlib/libc).  (9/1)

cleanup
	Ran (most of) the standard benchmarks.  Deleted the /u2 version of
	iraf.  (9/2)

------------------------------
Back at NOAO.  Problems reading tar file on VMS backup tape brought back from
DAO.  This is probably due to problems with the DAO software so I shall
document it here (copied from noao/lyra notes file).

doc/ports/alliant_86.doc
	Installed the notes file from the Alliant port.  There was some
	problem with the backup/tar file I made on the Alliant, hence it was
	not easy to get the notes file off the tape.  I had to use the new
	SPLIT task to split the 24 Mb archive into 49 512000 byte segments,
	and eventually determined that the notes file was at line 11115 of
	segment 39!  The problems with the tape are almost certainly not with
	the tape itself, since I did a backup/compare at DAO, and backup did
	not report any problems when the tape was read.

	I think the most likely culprit is the FTP software, which had to be
	used to move the archive to the VMS VAX, since the DAO Alliant did not
	have a tape drive.  FTP (binary mode) insisted on making a file with
	an undefined VMS record type; this would cause RTAR to crash the VAX
	if I tried to look at the file on the VMS VAX at DAO.  The 24 Mb archive
	file has one enormous section which is all zeroed, and then in the
	remainder of the archive all ascii zeroes appear to have been deleted
	from the archive, causing the 512 byte TAR file headers to be much
	shorter.  I tried the exact same operation (with a smaller test file)
	using our Eunice FTP and everything worked fine.  The DAO TELNET
	also gave problems; it would hang up if fed too much data too fast,
	and would occasionally crash with a stack trace.  Based on these
	experiences, I would certainly have to recommend the Wollongong
	networking software over the other vendor.  (9/6)