IBM System 34 double density format
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Revision as of 13:40, 28 July 2018 by Arnoldemu (Talk | contribs) (Created page with "The IBM System 34 double density format is a structure used by NEC765 compatible disc controllers when writing in MFM mode. The data has this form: The track starts with thi...")
The IBM System 34 double density format is a structure used by NEC765 compatible disc controllers when writing in MFM mode.
The data has this form:
The track starts with this:
Gap 0 (80 bytes of data 4E) Sync (12 bytes of 0) Index mark IDAM which contains 3 bytes of C2 (this has a missing clock) followed by 1 byte FC. Gap 1 (50 bytes of data 4e)
