It wasn't this simple? On Aug 23, 2017 8:16 PM, "Brian White" <bw.al...@gmail.com> wrote:
> Did you open the write-protect tab on the disk? > > I have observed that it ignores an officially copied disk (made on a 720K > disk using the backup utility), if the write-protect hole is closed. > > On Aug 23, 2017 4:05 PM, "Kurt McCullum" <kurt.mccul...@att.net> wrote: > >> A bit too soon to declare total success. I can duplicate data disks >> without any issues. I can even duplicate the Utility disk. But even though >> the duplicate has all the same data, it won’t auto boot. So those extra >> save commands that I think play with the ID portion of the track are >> essential to creating a true duplicate of the Utility disk. >> >> >> >> I’ll get there but it’s going to take a bit to figure out the ID >> information. >> >> >> >> Kurt >> >> >> >> *From:* M100 [mailto:m100-boun...@lists.bitchin100.com] *On Behalf Of *Kurt >> McCullum >> *Sent:* Wednesday, August 23, 2017 10:13 AM >> *To:* m...@bitchin100.com >> *Subject:* Re: [M100] Utility disk image from sector access >> >> >> >> I’ll document what I’ve got John. The backup utility that uses floppy >> does some strange calls which I don’t understand at all. But, if one reads >> the tracks from 0 to 80 and then in turn writes them from 0 to 80, those >> calls are not needed. >> >> >> >> Backup does some extra reads to determine just how many sectors to copy >> instead of reading the entire disk. And there are some writes that I don’t >> understand at all. I suspect they have something to do with the ID of the >> sector but I’m not sure. Without a manual I’m just guessing. >> >> >> >> My utility is a simple brute force read of every track and then the same >> routine in reverse. Slow, but it works. >> >> >> >> Kurt >> >> >> >> *From:* M100 [mailto:m100-boun...@lists.bitchin100.com >> <m100-boun...@lists.bitchin100.com>] *On Behalf Of *John R. Hogerhuis >> *Sent:* Wednesday, August 23, 2017 9:36 AM >> *To:* m...@bitchin100.com >> *Subject:* Re: [M100] Utility disk image from sector access >> >> >> >> >> >> On Wed, Aug 23, 2017 at 9:24 AM Kurt McCullum <kurt.mccul...@att.net> >> wrote: >> >> Success! I’ve got my utility reading AND writing TPDD2 disk images with >> the sector access commands. I’ve got a bit of cleanup and testing left to >> do and then I’ll put it in the members area. >> >> >> >> Kurt >> >> >> >> Documentation on the sector access protocol would be good too :-) >> >> >> >> It's the one dark corner of tpdd2 protocol (that we know of). >> >> >> >> -- John. >> >
