> On Sep 21, 2015, at 12:28 PM, Jay Jaeger <cu...@charter.net> wrote:
>
> On 9/21/2015 4:30 AM, Johnny Billquist wrote:
>
>> On 2015-09-21 02:11, Jerome H. Fine wrote:
>>>> Chuck Guzis wrote:
>>> Note that the RX50 was the same. DEC finally changed
>>> their marketing policy with the RX33 drive which used the
>>> same 3.5" HD floppy media as the PC. It was actually
>>> possible to FORMAT those floppies under RT-11.
>>
>> No, DEC actually did support users formatting RX50 floppies on their
>> own, but only on the Rainbow.
>>
>> Johnny
>>
>
> There was also a standalone PDP-11 diagnostic program available that
> could do it.
For RX50? On standard PDP11s, those used an MSCP controller, which means the
controller would have to do it. Did it? The only MSCP controller I remember
that did formatting was the UDA50.
I suppose you could on a Pro, since that had its own particularly disgusting
junk controller. But I haven't seen RX50 formatting there. My impression was
that they came factory formatted, with the DEC-specific 10 sector per track
format.
paul
