23 Jun
2026
23 Jun
'26
8:28 p.m.
On Mon, Jun 22, 2026 at 4:33 PM Fred Cisin via cctalk <cctalk(a)classiccmp.org>
wrote:
Unfortunately (or not?) the x86 BCD instructions have been removed from
'64-bit mode' in x86-64. I assume those processors are fast enough
emulating BCD if required to keep COBOL users happy.
The PDP-11 CIS instructions include BCD types and are very
interesting/weird (e.g. EDIT instruction).
KJ
My question
"what is that used for?" Answer:
"compound interest in COBOL programming".
Oh yeah.
That's what it is for