Arachnid 1000 Series Information page 21

Dart game
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The WIN and BUST Detection (WBD) card.
The
second
outputs
monostable
The oulse
'player turn'
These are routed to the 4 PSD cards and become clock pulses to
parallel load of the 3 decade counters.
they are loaded with the players last score).
Pulse PO-17 is fed from the GPM card to this
trigger
monostable
is also triggered by the WIN register being set).
pulse from IC12 is gated with the inverted output of the Bust register
and
the
previously
to produce PO-19 a through d.
clocks into a 3 decade register the players current score.
when a player has notbusted then his 'last' score is updated.
is also generated in a win condition such that the winning player has
a presented score of zero.
5.6 The Players Score and'
(Plugs 4,5,6 and 7 on the Motherboard)
A three decade counter,
hundreds
The
output
decoders
on
the
Motherboard.
trolled by Ll-31.
Ll-31 at a (which occurs at the start of a game) and PO-15 occurring,
301 is loaded into the counters.
then the players last score is loaded into the counters.
result of a BUST condition).
Pulse
last valid score into IC's 1,8 and 4 when he has finished his turn
and he has not bust.
Signal
score displays with current so that only those players who are taking
part
have
their
register
of
which provides a pulse to drive the buzzer.
from IC15 is also'used with gating from the appropriate
signals
and reset the Bust register.
mentioned
Display
is fed by a pulse train
from
this
counter
and
16
Their outputs feed the 3 decade counter and with
is derived from the WBD card and loads the players
PO-19
displays
illuminated.
is the BUST register. It
'players
turn'
signals
PO-19 is routed to the PSD cards and
(PSD)
card
feeds
3
binary-to-7
are
multiplexes
With Ll-31 at a 0 and PO-20 occuring
and TR2 to supply the players LED
It also triggers
(In a bust condition
is used to
(This
monostable
The
resultant
(Ll-07
through
Hence
from the SPC card.
segment
display
whose
output.is
(This is the
PO-19
con-

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