Atari 520 Power Supply Notes
Atari part number: CO70099
power supply DSP-1501 DVE
normal voltages are
Voltage
Amps
+5V
3A
+12V
30mA
-12V
30mA
people say the -12V is for the serial port only, if you don't plan on using the serial port you don't need the -12V
Hacks
because of the nature of the switched power supplies (you need a load before it can work) you may need to
plug the power supply into the 520ST
turn on the 520ST
plug the power supply into the wall
Cisco Systems ADP-30RB 34-0874-01
only provides the +12V and +5V