29 Mar
2002
29 Mar
'02
6:53 a.m.
Ethan Dicks wrote:
--- "Carlini, Antonio" <Antonio.Carlini(a)riverstonenet.com> wrote:
The use of BCD ... what's wrong with
good old binary! I guess they were
trying to make it easier for
the hard of counting.
Antonio
To verify (for sure) you should have
the yellow LED off (self-test failed)
and the red LEDs below that
reading OFF, ON, OFF, OFF, OFF, OFF, ON
(which is 21 in BCD - no, I don't know why!)
What doesn't make sense? 
29 Mar
29 Mar
8:30 a.m.
--- "Carlini, Antonio" <Antonio.Carlini(a)riverstonenet.com> wrote:
The use of BCD ... what's wrong with
good old binary! I guess they were
trying to make it easier for
the hard of counting.
Probably, since the MicroVAX-II and others used a hex code at the
back panel, and binary LEDs on the card edge.
Maybe they were worried about "is that 2E or 2F" vs easy to distinguish
decimal digits (especially if you chose your codes to avoid "0" vs
"8"
type confusion, etc.)
-ethan
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> Ethan Dicks wrote:
>
>--- "Carlini, Antonio" <Antonio.Carlini(a)riverstonenet.com> wrote:
reading OFF, ON, OFF, OFF, OFF, OFF, ON
(which is 21 in BCD - no, I don't know why!)
What doesn't make sense?
8151
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8151
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