The
Amiga
2000
Video
Slot
lNTRODUCTION
This document details the signals found on the internal video slot of
the Amiga 2000
(A2000), and the additional component of this slot
as implemented on the B2000 model. The A2000 video connector
is
a
36
pin edge connector, mechanically similar to the slot extension
connector of an IBM PC-AT. The B2000 adds a second
36
pin con-
nector, directly in front of the first one, that supplies additional
au-
diolvideo information. Where possible, a device should use only the
first slot, thus maintaining compatibility with both A2000 and
82000. Of course, there are quite a few things that can't be accom-
plished with the A2000 connector alone.
ORIGINAL
A2000
SLOT
The original A2000 video slot was designed to provide the function-
ality of the 23 pin external video connector in a form that could in-
ternally house video boards such as modulators,
genlocks, etc.
POWER CONNECTIONS
The Video Slot provides several different voltages designed to supply
Video devices. The A2000 power supply is currently rated at 200
Watts, which supplies the main board and
all other expansion ports
as well as the Video Slot.
Video Ground
Main Supply
(
+
SV)
Video supply ground used by all video devices and the internal video
circuitry. Currently on the
B2000, the Video and Digital grounds are
common signals, while on the A2000 these are distinct. This
is
avail-
able on pins
9,
12, 13, 17,20, 21, 24, 32.
Main digital level power supply for the Video Slot. This can supply
large currents, on the order of 2 Amps or so for the Video Slot. The
maximum supply current for the entire A2000 system
is
20 Amps
for all devices inside the A2000 that use
+
5V, including the mother-
board. Pins:
6,
8.
Negative Supply
(
-
SV)
Negative version of the main supply, for small current loads only;
there's a total of 0.3 Amp for the entire A2000 system. Pin: 31.
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