At 08:29 -0600 on 02/20/2006, Todd Burch wrote about Re: z/Architecture Principles of Operation (SA22-7832-04):

Roland, it's not that the IBM DSECTs are > 4096, it's that mine is.  And,
for instance, the MF=(E,WORKOPEN) execute form of the macro was in storage >
12 bits away.

I seem to remember that the address of a MF=E can take a register. Why not preload the register that MF=E loads (R1 I think) via a LAY and go MF=(E,(1))?

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