Re: Sun MFM controller formatting

My best guess is that the formatting/testing routines in the sun firmware would not be run with a Lisa or MacWorks based application (using the HD par. port interface), but run directly off the board over some type of simple terminal connection. The ST-506 interface uses RS-422 signaling for data (you can clearly see the RS-422 line drivers on the board), and the Lisa supports RS-422 (and also every mac at that time). Looking a the picture of the board, it's not obvious where to connect the terminal, but I will bet it's there somewhere.
Rick

On Jul 22, 12:52 pm, Al Kossow <a..._at_email.domain.hidden> wrote:
> Was there a utility program for formatting and verifying a Sun MFM disk
> in a Lisa? I dumped the firmware and scanned the PCBhttp://bitsavers.org/pdf/apple/lisa/sun_remarketing/Sun_MFM_Controller/
> and noticed there appears to be a formatting program in the prom.

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