"IBM Mainframe Assembler List" <[email protected]> wrote on
11/09/2023 12:54:36 PM:
> > But in addition to up to 4K, you can actually
> > do up to +/- 65K.
> OK, so the "normal" relative jump is the signed, 16-bit variety
> mentioned (15-bit relative target with left-most bit as the direction).
> How is that +/- 65K? Wouldn't that be +/- 32K?
Ah! I see! A little reading revealed that the 16-bit relative
target is not one-for-one but is the number of halfwords added or
subtracted from the current address location. That would double the range
from a literal +/-32K to an actual +/-64K range. Thanks! ;-)
Sincerely,
Dave Clark
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