It should, since it works on my other H/PC Pro MIPS devices, as well as on my H/PC 2000 PenCentra. See the bottom of this page:
http://search.casnavi.nec.co.jp/module_search/program/Module_Detail.asp?MODULE_NO=789
IIRC, you use cl_m3112.cab for the PenCentra, which has a TX-3922 CPU.
(If I'm wrong, though, then cl_m4112.cab will work.
)