It's NIBBLE Tinybasic, there was an old BYTE or KB Article on the earlier 8a500 version of same. _If_ I ever get to the bottom of my pile I have the manual for the National version of the SBC with the 8073 on it. Allison -----Original Message----- From: Richard A. Cini, Jr. <rcini(a)optonline.net> To: ClassCompList <classiccmp(a)classiccmp.org> Date: Tuesday, October 09, 2001 9:26 PM Subject: 8073-based SBC info Hello, all: I just received a National Semiconductor SBC kit that's based on its 8070-series 8-bit processor. It's got a version of TinyBASIC written by National as an instrumentation and control language. I have a family data sheet and a short industry article but no programming or user's manual. The board is manufactured by Sterling. There is almost no information on this board available through the usual search engines. Any info appreciated. Thanks. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/