At 18:04 -0700 on 08/21/2015, John Ehrman wrote about 8-byte V-cons:
Someone asked recently
(Do 64-bit V-CONs exist?)
and someone else replied
I don't think so, but 64-bit AD-cons with EXTRN do.
try a VD-type adcon. (See the HLASM Language Reference.)
Regards... John
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Note that there is a MAJOR difference between the value that ends up
on a VCON vs an EXTRN'ed ACON. A VCON ends up with the address of the
external address. An ACON gets that address ADDED to the original
value in the ACON.
IOW:
EXTRN EXTERNAL
DC V(EXTERNAL+4) points at EXTERNAL
DC A(EXTERNAL+4) points 4 bytes past EXTERNAL
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