Com1 is functioning correctly.
Modem on com3 is disabled in current profile.
I could not get W98 to install com2, so I manually installed it.
Device manager reports com2 as 02F8 - 02FF, 03, no conflicts.
Quickbasic files hault with "device unavailabel in module so-and-so at address 1222:005D".
New serial mouse cannot find com2.