2600A
MODEL
DIFFERENCES
-
ALL
REVISIONS
The major difference between the newer single board
VCS
(2600A)
and the original
VCS
(2600) is that all of the components formerly on the switchboard are now located
on the motherboard
(See
Figure
1-5).
This includes
the
player control function
switches (Power
ON/OFF,
COLOR/BW,
GAME
SELECT and
GAME
RESET),
RF
modulator and power supply circuitry. The single board design eliminates
the
need
for
the ribbon cable,
which connected the switchboard to the motherboard on the 2600
VCS.
Gone, too, are the luminescence
and
RF
output buffers and the two
TIA
input buffers,
all
of
which were contained in chip A203.
In
the
oscillator circuit, one of the
transistors and its associated network has been eliminated and R227-R230 (paddle
control lines)
are
no longer present. C239, going to pin
7
on J202 and 3203, has been
replaced by C236
and
C237 (See Figure
1-6).
Figure
1-5.
2600A Game Console
2600/2600A
Domestic
VCS
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