Bridgeport s1 CNC SEM motors and driver cards ok, Anilam Crusader 2 U/S

There are a umber of options for +/- 10V control (which is likely to be what is actually used)
wiki.linuxcnc.org/cgi-bin/wiki.pl?LinuxCNC_Supported_Hardware

If you have a parallel port you could look at pico-systems.com/PPMC.html

Otherwise the main contenders come from Mesa. There are two families of Mesa cards either DB25 or HD50. 5i25 +7i77 is a popular combo but the 5i25 seems to be out of stock. There is stock of 7i77 though
store.mesanet.com/index.php?route=produc...83_87&product_id=120
Which can be interfaced with the 7i92T and cotrolled by ethernet.
store.mesanet.com/index.php?route=produc...83_85&product_id=379
(Check with Mesa if the 7i77 pugs into the 7i92TM or TF variant.)
This is similar to the (out of stock) 7i97 ( store.mesanet.com/index.php?route=produc...83_85&product_id=344 )

My machines all use the HD50 style cards. 5i24 + 7i33 is probably worth a look if you have a PCI port (the PCIe 6i24 is out of stock)