Re: no 370 mode (Re: IPLing MVS 3.8J on non-00 LPAR CP

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> --- In hercules-390@..., Tony Harminc <tharminc@...> wrote:
>>
>> On 12 September 2011 20:18, Charles Durrett <charles.durrett@...> wrote:
>> >
>> > --- In hercules-390@..., Tony Harminc <tharminc@> wrote:
>> >>
>> >> On 12 September 2011 19:28, Charles Durrett <charles.durrett@> wrote:
>> >> > I've recently acquired a z890 on the secondary market and while I figure out how to power it up I'm using HERCULES (3.07) to familiarize myself with what my software options would be.
>> >>
>> >> MVS 3.8 ain't gonna run on a z890 no matter how you configure it. That
>> >> machine doesn't have a 370 mode.
>> >
>> > Yeah, I heard that.   The z890 Systems Overview (SA22-6832-03) states:
>> >
>> > ...
>> > Basic mode
>> >   Only LPAR mode is available.
>> > ...
>> >
>> > That's why I was 'surprised' when MVS 3.8J IPLed from CPU 00.   While ZZSA was also running on CPU 03.   Maybe CPU 00 is a pseudo-Basic mode while maintaining the integrity of the rest of the LPAR?
>>
>> You're mixing the z890 and Hercules. Merely specifying a CPU model of
>> 2086 doesn't make Hercules behave like a real z890.
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> True.  But how much like a real z890 would Hercules act like and what does that tell me about the real z890 I have sitting in the next room?
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> A lot it turns out.
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>>
>> > Time and tinkering will tell...
>>
>> And some additional hardware, I think. Without DASD you're not going
>> to be IPLing much on the real iron.
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> Also true.  I have most of a DS 6000 here too.  It'd IPL zVM or zLinux  I think but for business reasons IBM didn't include DASD emulation in the controller's software.  (For that matter there's a whole processor in the CP Book just for IO that could easily do DASD emulation.  Ah well.)
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> Say, maybe I could IPL off of tape... :-)
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