Best bet for older Mindstorms and Linux

I have an old RCX 1.0 with serial (9 pin) IR tower, and wondered what the best way of using it with Linux would be.
I thought NQC was the way to go, but can't find Linux support anymore.
I'd prefer to stick with C and the existing firmware if possible.
Failing Linux, does anyone know if the tower will work with a USB to RS232 converter under Vista?
Grateful for any help,
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