FDC Gap Length?
dave04a at dunfield.com
Sun Jul 17 10:10:29 CDT 2005
>Part of the calculation is the time it takes the data separator to re-sync
>after each gap. Now, a "true" 765 doesn't have a data separator so maybe
>they leave this out. It's also true that this number ought to be nearly
>constant depending on sector sizes.
I would assume this is covered by the minimum requirement that Allison was
talking about... Right now I am just trying to find the correct gap sizes
for formatting. Then I will have to worry about the gap size for writing
(which is different, as you obviously don't want to carry through to the
beginning of the next sector).
>Do you have the Intel 8272 data sheet? (This was Intel's part number
>for their 765 clone. It may not just be a clone but the exact same
>mask...). IIRC there are more details/examples/math in the 8272 data
>sheet, including some recommendations for data separators and the good/bad
>of different types.
I do have the Intel data sheet and application notes, however they do not
provide any additional information on selecting the Gap size - just the same
"magic table" that NEC provides.
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
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