Fairchild Semiconductor F8

Introduction - 3859 and 3870

Thanks to John Shaw, I have a pin diagram of the MK3870 and the MK38P70. The MK just identifies Mostek as the chip manufacturer.

The 3859, manufactured by Fairchild, is essentially a 3850 and 3851 on a single chip. The 3870, manufactured by Mostek, is a 3850 and 3856 on a single chip.

Here is a logical block diagram of the 3859 and 3870 microprocessors. [image of F3859/3870 logical block diagram]

Pin Diagrams

Colophon

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