On Thu, 12 Apr 2012 21:30:24 +0200, R.S. wrote: >W dniu 2012-04-12 20:47, Tom Marchant pisze: >> >> z9 introduced these facilities: >>... > >So what? How does it compare to 50+ new instructions in z10? > > >>> A big change was introduced with z/990 and later with z10. >> >> z20, yes. z990, not so much. And a big change with z996. > >You're talking about z30, z99998 and USS? <vbg>
sorry, finger check. I meant to say z10, yes. z990, not so much. And a big change with z196. >Just to remain: z/990 introduced CSS concept, >60 LPARs, 1024 channels, 30 LPARs and 512 channels on the z990. CSS and greater than 256 channels was quite a significant architectural change, IMO >CCF->CPACF(+Crypto cards), STP, Server-Time Protocol was introduced on z9. >PCHIDs, >16 CPs, new specialized CPs. >Was it small change? I don't think so. Good point. Lots of stuff in z990. I was thinking more of instructions. More than 100 new instructions on the z196. I would think that the level that IBM selects for a level set is based upon the facilities that the operating system wants to depend upon being there. The timing of the level set is likely somewhat political. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
