[Coco] Re: [Color Computer] Help for transfering Coco disk to PC
diegoba at adinet.com.uy
Fri Mar 25 09:36:18 EST 2005
I do read CoCo disk using a 1.2 Mb floppy
I think the best would be getting a small HD on ebay, and installing DOS
(freedos?) in it.
Then just use RETRIEVE.EXE to read the disks
> Coco's disks are not going to be readable in a 1.2 meg drive, the
> spindle speed is wrong for starters. The heads are too narrow for
> problem B, and problem C is the data rate.
> Coco disks are only 35 track SS disks unless you were using os9, in
> which case the 720k drives were usable. The 1.2 meg format uses a
> 500kilobaud data rate, spinning at 360 rpm. The Coco's used a
> 250kilobaud data rate, with the disk spinning at 300 rpm.
> You may be able to jumper that drive for 300 rpm, and the right
> switches in the driver may be able to slow the data rate down, but
> then can it double step that 96 tpi drive to emulate a 48 tpi drive?
> Lots of problems and you would be far better off to try to find an old
> 360k drive that would be far less work to make it work.
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