SirMike
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Posts posted by SirMike
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No, you cannot get information from the MFM drive. Those comfort features were introduced with SCSI/IDE. The values for Precomp and RedWrite are calculated from the number of cylinders. They are just guesses and do not need to be precise.
Thanks, this is helpful. I need all the information I can get with this. I would like to get this drive working to make my archiving of disks easier rather than backing up to floppy so often.
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Thanks for that, does that mean that the Myarc card somehow 'finds' information off the drive as you enter information, or does it just have a 'default' section in its programming that puts in stock values that may fit the bill. The information I have came from a webpage.
i originally had my 99/4a in 1982 and mothballed it the early 90's moving to a PC. I still have many hundreds of 5.25" floppys and modules and decided to resurrect it a few months ago, hence the purchase of the Myarc card and two 20mb drives, the 40mb is for mass storage as I back up the floppy library to it and replace the disks with 3.5"
Hence the request for assistance, the 40mb will be needed soon.
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Hi I am new to this forum, so if this post is in the wrong section or if I am doing it wrong please tell me.
My question is -
I have a Myarc HFDC card in my expansion box and I am running two 20mb hard drives. All OK so far. I have a NEC D3142 hard drive of 40mb which I would like to use as drive 2 However I cannot get it to format with Myarc disk manager 5, as I do not know all of the parameters to fill in the configuration section.
Has anyone used one of these drives and can tell me the missing values:
I have 642 cylinders
8 heads
17 sectors per track
then it asks for precompensation, interlace, other questions also.
HELP PLEASE?
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I also would like to purchase one of the F18A boards.

Myarc HFDC hard drive settings
in TI-99/4A Computers
Posted · Edited by SirMike
Thanks, but drive one is still running, while I add drive two and try to work out the parameters to get it so the HFDC will format it.