Changes
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)
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)
