Have you tried closing the HD sense hole with a piece of tape or similar? ----- Original Message ----- From: Stephen Adolph To: m...@bitchin100.com Sent: Sunday, March 24, 2019 6:08 PM Subject: Re: [M100] question regarding floppy disks.
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