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Friday, April 10, 2009

Chipdir - Database of ICs

This site contains. Numerically and functionally ordered chip lists, chip pinouts and lists of manufacturers, electronics books, CDROM's, magazines, WWW sites and much more.

Chipdir - Database of ICs by Jaap van Ganswijk

Why use the 8085 one might ask. Well it's a straight and simple traditional 8-bits processor with hardly any strange quirks, except perhaps that the data bus is combined with the lower part of the address bus to save pins. This trick is often used and you only need a one way latch to keep the address stable while the bus is used for data in the second halve of the memory cycle.

A real-world 8085 project

Chipdir - Database of ICs

The 8080 and even the later 8086/8088 need two 82xx series support chips, whereas the 8085 can work on it's on (except for the latch).

The completed 8085a unit along with the power supply that Lewis built and a 7-segment display unit. The photo shows the computer in operation.