[Coco] Disk Drive FD 501 Floppy

[Bruce W. Calkins]

Correct, the boot sequence is hard coded for DRIVE 0.  It can be 
"corrected" as RGB-DOS did with their implementation of booting the the 
hard drive.

Bruce W.


On 4/17/19 4:02 PM, Bill Pierce via Coco wrote:
> I don't think OS-9 will boot from drive 1 unless specifically configured to do so.
>   
>   
>   
> -----Original Message-----
> From: Melanie and John Mark Mobley <johnmarkmelanie at gmail.com>
> To: coco <coco at maltedmedia.com>
> Sent: Wed, Apr 17, 2019 3:15 pm
> Subject: Re: [Coco] Disk Drive FD 501 Floppy
>
> I bought some super tech (TM) multi-duty complex hi temp applications (red)
> grease for Walmart.
> I put the grease on the rods that hold the read head and let the read head
> slide back and forth.
> This did not fix the issue.
> I swapped drive 0 for drive 1.  I swapped the termination resistor pack.  I
> swapped 3 jumpers on each drive.  And now drive 0 will boot OS9 without a
> warm up time.
> There is one variable resistor on the drive, but I do not know what it does
> or how to adjust it.
> I do not now know how to test dive 1 as I can only boot from drive 0.  DOS 1
> starts booting from dive 1 but then switches to drive 0.  Perhaps I need a
> different boot disk.
>
> -John Mark Mobley
>
>
>