Hello. I'm trying to replace a Xebec S1410A SASI controller with a Data Technology Corp. DTC-510B or DTC-510A, for a old homebrew computer (http://www.z80ne.com) The problem is that, even if the controllers should be "almost" compatible, the DTC-510A/B doesn't work (while the Xebec works fine). I'm not able to find any manual about it, only some dipswitch settings. Perhaps has someone a user manual for DTC-510B (and DTC-510A) so that I can compare commands, configurations, etc. with Xebec S1410A? Thank you very much. Roberto Bazzano