Re: A//c 255ROM up to EPROM

["Bill Garber" <willy46pa@comcast.net>]

"Riccardo" <rigreco.grc@gmail.com> wrote in message
5ac4b2f2-3019-4b8c-b179-98366298f294@googlegroups.com">news:5ac4b2f2-3019-4b8c-b179-98366298f294@googlegroups.com...
>>>
>>> Smart Port is based on slot# 5.  So, PR#5 will access the first external 
>>> drive.
>>>
>>> The second daisy chained 3.5" drive will be Slot#5, Drive#2 which will 
>>> depend
>>> if there is a Ram driver installed and if there is a ramcard in the IIc.
>>>
>>> Otherwise, the second daisy chained drive will be slot#2, drive#1.
>>>
>>> And the third drive is slot#2, drive#2.
>>
>> Any 5.25" drives daisy chained to the external drives will still keep 
>> slot#6
>> but will be drive#2, whereas the internal 5.25" drive will still be 
>> slot#6,
>> drive#1.
>>
>
> Today, i successfully update my A//c from ROM FF to ROM 00. But, i note 
> that:
> i can access and work fine by external drive (A2M4050) in D2,S6, but i 
> can't
> boot external drive by PR#5 command; i think it required a smart drive 
> like
> Unidisk (A2M2053) on the first of daisy chain disks.
>
> Someone of you, know another way?

Yes, the IIc ROM 00 upgrade does require the Unidisk smart drive.

Bill Garber
http://www.sepa-electronics.com