[Coco] working with physical floppy drives under NitrOS-9 via DriveWire

[Barry Nelson]

OS9 and NitrOS9 look of the floppy controller hardware in slot 4 of an attached multipak interface. The driver apparently also expects this to be the active slot. If you were using a CoCo 3 you could simply switch slots to slot 4 with your disk controller before typing DOS since you would be in all ram mode anyway, but I see you reference that you are using a CoCo 1, so if you are that will not work. You should be able to resolve the issue on a CoCo 1 by typing:
POKE &HFF7F,&H03:DOS
This should leave your HDBDOS rom selected in slot 1 so you can boot using DriveWire, but enable the I/O hardware in slot 4. The 0 references slot 1 (1-1=0) and the 3 references slot 4 (4-1=3).

Please read this old thread here: https://pairlist5.pair.net/pipermail/coco/2015-May/146141.html

> Bill Pierce ooogalapasooo at aol.com 
> Sun Oct 18 11:31:16 EDT 2015
> 
> Chris... HDBDOS has NOTHING to do with OS9.
> Once OS9 boots ALL RSDOS is lost (including hdbdos)... always has been. OS9 relies on it's own drivers and uses ALL of the 64k (including all rom memory)
> Now with that being said, if you are using the Drivewire disks from the repository, you should have access to your normal drives in os9 as those disks come with /d0, /d1, & /d2 installed on the disk.
> I think your problem is that you are running hdbdos from another cart & therefore changing the slot number from your disk controller... Personally, I would replace the rom in the disk controller with the hdbdos rom. hdbdos (all forms) is about 98% compatible with RSDOS and will access your drives fine from RSDOS. Read the hdbdos manual:
> http://www.frontiernet.net/~mmarlette/Cloud-9/Support/index.html
> But OS9... it has nothing to do with hdbdos (except to boot), and once it's running, you should have drive access.
> 
> try:
> dir /d0
> (with an OS9 disk in the drive)
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> Bill Pierce
> "Charlie stole the handle, and the train it won't stop going, no way to slow down!" - Ian Anderson - Jethro Tull
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