<Hi all, <Today I bought a SC/MP wirewrapped board. Does anyone know of a site with <data sheet? My search came up with what is known as "SC/MP II", including <description of a "MK14" project in Practical Electronics mag. In <particular, the chip on my board requires an unknown neg. voltage on pin <40, instead of +5 Volts on the later NMOS versions. The actual part No. is <ISP-8A/500D That is the early Pmos part (SC/MP and not the II) and the voltage there is -7v (Vgg). Never saw that particular schematic (Practical Elect.) there was one in an early kiloboaud, byte or interface age you could look at for more info. I have a working example of the inexpensive board national sold with that chip, 256bytes of ram and a monitor. I'd doubt there is a site with a data sheet unless someone got permission form National Semi to scan one. Allison