🚀 go-pugleaf

Hi all.  Here's my weekly batch of wierd questions.

What if anything has happened w/r/t fixing the dreaded '40 directory'
bug?  I saw a lot of discussion of the problem and symptoms, but no
mention of a fix.  I've recently gotten a hard disk, and so am now in a
position to get screwed by this bug.

Is there a recent copy of Spacewar available?  The one in the archives
appears to be mono only (I use color) and the one on UMIX.CC.UMICH.EDU
is corrupted; at least neither ARC on my ST nor ARC on a Un*x can read
it.

I'm trying to understand the difference between .O files (as produced by
C backends, I guess) and executables, ie .TTPs etc.  It looks to me like
they're the same format (both relocatable) and that the only net
difference is that in the executable, all the TEXT psects from the .Os
are concatenated together, all the DATA psects ditto, etc, and that
references are resolved.  If that's true, it seems like the linker's
pretty trivial.  If not, what am I missing?  Also, if my supposition
about the linker's true, what's RELMOD for?

Are there any PD debuggers around?

As always, thanks in advance for any info.