Hello Everyone, System: Compupro CPUZ Compupro RAM17 Compupro System Support 1 Dual IDE CF (as Drive A and B) ZFDC (with 5.25 and 3.5" disks as C and D)
I am now modifying my BIOS to allow for using a 1.44mb 3.5" diskette on my ZFDC. Looking at the Disk Parameter Header in the HFL3.ASM file I have referenced the proper Drive Parameter Table (CPM144) but there is one piece still missing. It is what CPM3 refers to as the '*Sector Skew Macro*' for this format disk. Here are the two formats that John has included in the original files for 8" and 5.25" drives: SD128$trans: skew 26,6,0 ;8" sector skew (Note first sector is 0) DD512$trans: skew 16,4,0 ;5" sector skew (16 = 8X2) I will need something like this: CPM144$trans: skew 36,???,0 ;3.5" sector skew (36 = 18 sectors per track X 2 sides, sector count starts with 0) The part with the ??? is what I need and described here in the CPM System manual: *SKEW Macro* The SKEW macro generates a skew table and requires the following parameters: the number of physical sectors per track, the skew factor, and the first sector number on each track (usually 0 or 1). The form of the SKEW macro call is label: SKEW ?secs,?skf,?fsc where: ?secs is the number of physical sectors per track; ?skf is the sector skew factor; ?fsc is the first sector number on each track. So, what do I need for the sector skew factor? Thanks, Thomas -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
