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Marty
August 20th, 2009, 08:55 AM
Hi all;
Does anyone know IF the Fairchild F 8877 is a direct replacement for a 1791/1793 Disk controller Ic.....
THANK YOU Marty

Chuck(G)
August 20th, 2009, 09:45 AM
I don't think you mean Fairchild, but rather Fujitsu.

In particular, the MB8877A is more-or-less compatible with the WD1793-02, with the exception that it's single-supply (pins 1 and 40 are NC) and is designed using later technology. Otherwise, it's a pin-for-pin replacement.

If it's the WD1791 you need a substitute for, that would be the MB8876A.

Marty
August 20th, 2009, 11:22 AM
Hi Chuck;
THANK YOU !!!!! I saw the F and thought that it was Fairchild, I just got a Tarbell Double Density Controller and the F8877 was what it had in it... And since the Board didn't seem to work, That was the first thing I though of...I will have to do some more checking to narrow things down...
THANK YOU Marty