ipaddict wrote:Three banks and a little company called Intuit that I have done IT work for have used the RS/6000 as development/testbed platforms for their i5 software.
No, they used RS/6000 as the development/testbed for their Linux/PPC or AIX software. They just happened to want to put it onto an LPAR on their i5 when they finally deployed it.
OS/400 and i5/OS licensing is vicious and totally unlike that for AIX. It's a meaningful difference for hobbyists. It's at least hypothetically possible for a hobbyist to get his RS/6000 up and running from a blank disk, with some luck. It's nearly impossible to do so with an AS/400 or i5. (Unless a. It's new enough to support LPARs and b. You're willing to get by with AIX or Linux instead of the incredibly neat environment that you probably bought it in order to use.)
At any rate, if it doesn't come already-working, you're not going to get OS/400 up and running on a second-hand AS/400.