RE: Re: GCIC Fullscreen applications

Ivan

Where are the IO interrupt addresses?
In the PSw or in pos 128-129.
I am picking them up from the PSw?

Roc 

-->-----Original Message-----
-->From: [email protected] 
-->[mailto:[email protected]] On Behalf Of Ivan Warren
-->Sent: Wednesday, August 25, 2010 21:00 
-->To: [email protected]
-->Subject: Re: [H390-VM] Re: GCIC Fullscreen applications
-->
-->On 8/25/2010 7:29 PM, Rocky wrote:
-->>
-->> Just one caveat - Needs to run in BC mode so in MAINT you 
-->may have to 
-->> do a set ecmode off first.
-->> then I CMS.
-->
-->Nah.. I don't think so.
-->
-->You can run with a BC mode PSW with on an ECMODE ON virtual 
-->machine (but not the other way around).
-->
-->The only reason for SET ECMODE OFF to exist is to allow CP 
-->to perform fast virtual machine context switching - since 
-->there is a whole lot less to save when the machine is 
-->guaranteed not to be able to do ECMODE stuff.
-->
-->With ECMODE OFF :
-->- No (virtual) EC mode PSW (of course, the real PSW is an EC 
-->mode PSW - always).
-->- No Clock Comparator or CPU Timer
-->- No STOSM or STNSM instructions
-->- Only 1 CR : CR0
-->- And some other things I can't remember off the top of my head..
-->
-->With ECMODE ON, none of the above restrictions exist : you have a
-->(almost) complete S/370.
-->
-->--Ivan
-->
-->



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