Mike Douglas 7a231a2cf9 AltairZ80: Add support for North Star single density controller ...

The first disk controller made by North Star was a single density
controller (MDSA). This was followed by the double density controller
(MDSAD) that is already supported in SIMH. This update adds support for
the single density controller as device MDSA. Since the controllers are
not software compatible, this update allows running of older software
designed for the MDSA controller.

2015-12-16 15:39:46 -06:00

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