[Coco] NitrOS9 build errors

Tormod Volden lists.tormod at gmail.com
Mon Jan 20 16:53:31 EST 2014


On Mon, Jan 20, 2014 at 12:48 AM, Bob Devries wrote:
> I think a combination of bits from DD.FMT (offset $10) in LSN0, that is:
> bit 0 = number of sides (0=single, 1=double)
> bit 1 = density (0 = single density, 1 = double density)
> bit 2 = track density (0 = single (48TPI), 1 = double (96TPI)
>
> So it should be enough to read LSN0 byte $10 to identify the disk. However,
> if the byte at $10 is not correct when the disk image was created, we have
> problems.

This is exactly what "os9 id" is doing (don't know if you read my
e-mail from 15 minutes before yours). But those 3 bits alone are not
enough to cover all possibilities.

Tormod



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