[rescue] Mainframe on eBay
ploopster at gmail.com
Mon Sep 19 13:53:37 CDT 2005
Jonathan C. Patschke wrote:
>>The characteristic required in the F50 is the secondary PCI bus. Just
>>make sure the 7043-150 has a secondary PCI bus, and plug it into one of
> I believe both the -140 and the -150 have secondary PCI buses. They're
> connected to the system via a PCI-PCI bridge connected to the primary
> bus. Do the buses need to be peers, or will that work?
Actually, I think they specifically *can't* be peers, so it should work
fine. Just make sure to plug into the secondary bus.
>>Even on the F50, you have to plug into the secondary slots.
> Odd. Is the P/390 a bus-master or DMA-heavy device? I'd thought that
> it would be relatively well-behaved because it has separate memory. Or
> does the ARCTIC-960 card receive commands from the P/390 instead of the
> host system?
I'm pretty sure it's busmaster. However, it is well known to be one of
the *most* finicky devices out there. It's pretty heinous in that
regard, actually. I've found that the only non-IBM PC chipset the P/390
PCI works in is the i450NX. Pretty rare chipset, on the grand scheme of
And yes, I believe that the ARTIC is communicated to directly.
> BTW, this isn't exactly up your alley, as you're a mainframe guy, but my
> new boss was the lead architect for the S/32, S/38, and RT/PC projects.
> I definitely plan on picking his brain sometime. :)
I've played with RT's somewhat. 8-)
I know next to nothing about AS/400's and their predecessors. Except
that they're EBCDIC and use shared-memory processes which is just
strange enough to warm my heart.
What's your boss's name?
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