08-07-2014, 03:40 PM
I got writing working a few days ago for general MFM and FM formats, but haven't added pre-compensation yet. The documentation wasn't completely clear on how the bulk data for writes should be supplied, though I figured (correctly) it'd probably be the reverse of reading and require a RAM upload in advance.
I've a few extra questions too:
1) If the index is already active when an index-synchronised read/write is started, does the firmware wait for the start of the next index or start immediately?
2) Does the density setting control double-stepping tracks, or something else?
3) What difference does the 300 vs 360rpm make for reads and writes? Is it only for drives that support programmatic control of the motor speed?
4) Do you have any recommendations on when (if ever) the device needs resetting? Does closing and re-opening the device give a fresh session, or is it still possible there may be buffered data from a previous session?
Cheers
I've a few extra questions too:
1) If the index is already active when an index-synchronised read/write is started, does the firmware wait for the start of the next index or start immediately?
2) Does the density setting control double-stepping tracks, or something else?
3) What difference does the 300 vs 360rpm make for reads and writes? Is it only for drives that support programmatic control of the motor speed?
4) Do you have any recommendations on when (if ever) the device needs resetting? Does closing and re-opening the device give a fresh session, or is it still possible there may be buffered data from a previous session?
Cheers