Commodore Amiga A500 Technical Reference Manual page 107

The Amiga 2000 Video Slot
lNTRODUCTION
This document details the signals found on the internal video slot of
the Amiga 2 0 0 0 (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 t o 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 t o provide the function-
ality of the 2 3 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 t o supply
Video devices. The A2000 power supply is currently rated a t 2 0 0
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, 1 7 , 2 0 , 21, 24, 32.
Main digital level power supply for the Video Slot. This can supply
large currents, on the order of 2 Amps o r so for the Video Slot. The
maximum supply current for the entire A2000 system
is
2 0 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.