I believe NComm has a smaller memory footprint, slightly smaller than JRComm, and NComm seems to be speedy on 1.2, 1.3 systems and it should give you everything you need. It was the first term program I used in the modem days for the amiga.
JRComm is also good, but seems to be better suited for 2.0 and up environments.
Then there is "Term", which is admittedly very large but very functional, might be overkill and probably only 2.0 and up.