the Coco is using it's standard controller When issuing the DSKINI 0 command the coco tries to format for 180kB.
The combination of (Coco, std controller, PC 1.44MB drive + a 720kB dd floppy) works whereas (Coco, std controller, PC 1.44MB drive + a 1.44MBB hd floppy) does not work this is something I don't understand! On Sun, Mar 24, 2019 at 5:42 PM Gregory McGill <arcadeshop...@gmail.com> wrote: > likely the floppy controller doesn't support 80 tracks or high density.. > most of the controllers of the era are ds/sd 40 track or dsdd 40 track.. > are you able to format 720k? ds/dd 80 track? > > Greg > > On Sun, Mar 24, 2019 at 2:38 PM Stephen Adolph <twospru...@gmail.com> > wrote: > >> I'll start by saying this isn't an M100 or TPDD discussion, but just >> looking to understand something. >> >> I have a Tandy Coco3 with a 3.5 inch floppy drive. The drive is a >> standard PC drive and it is working well. >> >> Seems though that I cannot use 1.44 MB floppies in that drive. They don't >> seem to want to format. >> >> I really don't understand where the problem could be. >> - the drive and the floppy are compatible >> - the disk is known good and formats at 1.44MB in a PC >> - if it can support 135 TPI, why can't it support 35 TPI? >> >> Does anyone know what's going on? >> >> thx >> Steve >> >
