Re: Universal Disk Controller

[Tom Zuchowski <cd003508@interramp.com>]

louiss@gate.net           (Louis Schulman) wrote:
>OK, if I put this card in slot 6 of my //e, and make the 3.5 Drive 1 (so I can use
>the auto eject) and a 5.25 is drive 2, will I be able to boot DOS 3.3?  From Drive
>2?  From the 3.5?  Different answer for ProDOS?

I dug up the UDC manual. It lists 13 different supported drive 
configurations. First, it does =not= support any daisy-chain in which a 
5.25 comes before a 3.5.

To do what you want, the UDC must be installed in slot 5. Put the 3.5 on 
J1, and daisy-chain the 5.25 to the 3.5. The manual says that both drives 
will be bootable with this configuration.The boot-up drive will be Drive 
1.

What I have always done is put my 5.25 drives on a regular 5.25 controller 
in slot 6, and put my 3.5's on the UDC in slot 5. This avoids problems 
with some DOS 3.3 software that assumes that the drive is in slot 6.

J1 supports daisy-chaining up to 4 drives. The third and fourth drives 
will be mapped to slot 2. However, while J1 supports up to 4 drives, it is 
not recommended to daisy-chain more than two drives because of signal 
degradation. J2 does not support daisy-chaining.

TomZ