Interesting Ohio Scientific Information

Hi Bill,

I haven't forgot you, just got around to pulling box out of storage.

The plastic cases are C1P Series 2. I ran across a usage report dated 11/24/1980 that indicates we had plastic shells in stock then. Those plus what we had on order at that date was for about 1000 units. Average weekly usage on the report was 28.5 units. I don't have any more specific figures than that. I know we shipped C1P Series 2 units, but I have no idea of the total.

If you're not aware of it, the C1P plastic cases were simply top and bottom shells that attached to a C4P metal case. The C4P case used the same metal, but had the walnut sides. There were metal case C1Ps before that. From the literature I have, it appears the metal case C1P shipped <until> about August of 1978. An October 1, 1979 sales information release still showed the metal cased C1P.

The same 11/24/1980 usage report shows 4 560ZB PC boards in stock with none on order and average weekly usage zero. My guess is that these are the remainder of a run of 5 or 10. They are very rare. I believe I saw a board once. I never saw one operating. I did not design it. The 560Z was a redesign of the earlier 460Z that I don't think I ever saw. The 560Z board ran the Z80 and Intersil 6100 micros. I have a 560Z schematic dated August 1977 with status indicated as "Production". The 460Z is in a March 1976 price list and appears to only have supported the Intersil 6100. Both boards require a OSI 6502 based CPU board as a host. I started at OSI November 1977. The 560Z board appears to be the last board designed before I became Chief Engineer. I ran across some technical information that because of PDP8 unique IO micro code, that you could not simply run PDP8 code on it.