At 13:36 -0500 on 10/11/2005, Glenn Miller wrote about Re: MVCIN instruction:

However, I saw a creative way to use 2 instructions that would reverse the
data in the read buffer.  Remember
this code was originally written for a S/360 Model 30 machine.  Anyone have
a guess what these instructions
were/are?


 MVC WORK,MASK  Movement Pattern
 TR  WORK,INPUT Moves INPUT to WORK like MVCIN (ie: offset 9 to 0 TO 0 to 9)


MASK  DC 10AL1(WORK+9-*) or X'09080706050403020100'
WORK  DS CL10
INPUT DS CL10 (MICR INPUT BUFFER)

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