On 9/18/2011 8:38 PM, somitcw wrote:
> --- In
hercules-390@...,
> Gerhard Postpischil<gerhard@...> wrote:
>>
>> On 9/18/2011 10:58 AM, Paul G wrote:
>>> IBM mainframe operating systems are disk based only.
>> As the saying goes, "All generalities are false."
>> $IBSYS and predecessors IPLed from the A1 tape drive. In
>> addition to Kevin's TOS comment, what is BOS?
>> Gerhard Postpischil
>> Bradford, VT
>
> BOS is one of the five early S/360 operating systems:
You are familiar with the concept of a rhetorical question? BOS
could be loaded from tape, so qualifies for inclusion.
Conversely, I had a number of "card decks" that I kept in a DASD
file with a custom loader program; this was handy for things
like UCS loading, a DASD CLIP, and the Memorex FRIEND program.
Gerhard Postpischil
Bradford, VT
