On 10/17/2016 9:16 AM, Paul Gilmartin wrote:

Hmmm... What happens if AMODE 31 code issues LRA and the real address
is above the bar?  Program check?  Or does LRA simply (always?) load a
64-bit register?  Is there an LRAG instruction?

Why not take at least a cursory glance at Principles of Operation before asking such questions publicly?

Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245

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