[rescue] Serial console on IBM RS/6000 250?
Jonathan C. Patschke
jp at celestrion.net
Sat Feb 21 12:09:52 CST 2004
On Sat, 21 Feb 2004, Todd Carson wrote:
> No. I've tried a Sun monitor and a VGA monitor with an adapter,
> neither display anything. I saw on the list archives that the pinouts
> are different between Sun and IBM, so I'm assuming that nothing but an
> IBM monitor, or the right adapter, is going to work.
An SGI monitor on my 250 does the right thing. The monitor just needs
to be sync-on-green and not do strange things to the sense pins.
> So I'll definitely be needing AIX install media, then? Or are there any
> floppy images or the like available online that can reset the console?
AIX 4.3.3 is six CDs. I don't think you'll be wanting to install via
> Yeah, the case is already off. So I guess I'll try to get some AIX
> media from eBay and try to bypass the lock. Thanks for your help.
You will also need an IBM SCSI CD-ROM drive. There aren't too many
models that a 250 will talk to. Unfortunately, I don't have that
magical drive, so I'll be RIPLing mine off the 370 for the
I don't mean to discourage you from exploring this machine, but the 250
is quite possibly one of the most frustrating RS/6000s out there. The
7248 series (43P-100 through 120) machines come close, but I've been
having a lot of "fun" getting my 250 to be useful. Just don't color
your opinions on the whole RS/6000 family on the basis of that one
little troll of a box. :)
 Four for the OS, two for documentation.
 "RIPL" is IBM's term for "netbooting".
Jonathan Patschke ) "Being on the Internet is not the same as being
Elgin, TX ( famous. That's like calling Cheetos 'dinner'."
USA ) --Metal Steve
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