<> <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 < <Some time ago i found one of these systems. It also included the = <original datasheets from National. It says that the voltage on pin 40 = <must be -7Volt. =20 <When you need more info i can send you a scan of the datasheets. There are two versions of the SC/MP the older Pmos part that requires +5V and -7V and the later NMOS part that only wants +5. They are nearly identical elsewise. <Unfortunately my system doesn't function. So i'm looking for the = <scematics. Maybe you can help me out?=20 I'd have to dig deep for them, I know I have them for the commercial board. Then I'd have to copy them as they are real paper and I don't have a working scanner just yet. Oh, I'm here in eastern USA. Allison