I stand corrected on the serial port, yes its 25 pin. sorry.
But what he wanted, If I understand correctly, is a quick way
to transfer files between the 2 machines.
Null Modem is the quickest and easiest way I know of.
I've never used a ParNet so I can't really comment on how
easy or hard it is to set up. Null Modem is quick and easy.
If he wanted to have them connected all the time then
maybe ParNet is the way to go.
My memory may be faulty here because it was about 15 years
ago that I was doing this between a PC XT and an A500.
Both had harddrives and it seems to me that the serial
connection ran at about 115k.
I ran a BBS on the PC XT and did alot of transfering of
files between the machines.
But as I said, that was about 15 years ago, memory can fade.
:-D