On Thu, 29 Aug 2019 16:54:15 +0000, Seymour J Metz wrote: >No, that means that for 24-bit mode, bits 32-33 are 01 after BALR and 10 after >BAL, per p. 6-7; the ILC is not stored for 31-bit and 64-bit modes. > In AMODE 24, BALR sets bit 32 to 0; in AMODE 31 to 1. I have used this to detect AMODE in code that had to run in both XA and 370 without causing a program check.
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