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View Full Version : Intel N82877-1 FDC Datasheet wanted.



IBM Portable PC
January 10th, 2014, 12:28 AM
A million mentions in Google, but no PDF.

As used by the Compaticard IV.

Chuck(G)
January 10th, 2014, 08:42 AM
Are you certain that you haven't left out a zero?

82077 datasheet (http://www.buchty.net/casio/files/82077.pdf)

Pretty much identical to the National PC8477B, except that FM support is broken. Microsolutions replaced the 82077 chips in its controllers with the National brand after users started complaining. Since we used to use a lot of the CC IVs, I discovered the problem myself with the AA-1 version of the 82077AA, contacted Intel, and had a rather brusque reply from an applications engineer that nobody used FM any more, so that they had no intention of fixing the problem. Previously, it had worked with the -AA version.

I pretty much gave up on Intel's peripheral support, so I don't know, for instance, if FM support is also broken on the Intel 82078. It would not surprise me if it were.

IBM Portable PC
January 11th, 2014, 05:01 AM
Yes, a typo....... Thanks for the datasheet!