Tom. You might want to look at the Zeta Z80 board to find this.... Also this would make the disk interchangeable with the Zeta board...
Also, can you post a list of jumper setting your using, and any cable or board issues you have found... Thanks i~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~i Tom Lafleur On Oct 25, 2014, at 3:56 AM, Thomas Owen <[email protected]> wrote: 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. -- 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.
