I have an Digital AlphaStation 4/255 266 MHz that miss the power supply.
I have looked into the hardware documentation of the machine (online). And it
seems that of the four power connectors. The two first (J19) seems compatible 
with standard PC AT-supply. While the second two are GND & 3,3 Volt. Is that 
true?  (I assume VDD is +5V).

If so could I make an converter adapter so I can run the AlphaStation with a
standard PC ATX power supply ?, 

How many Watts does that need to be to just run the motherboard+cpu+memory ..?

     /Peter

ftp://ftp.netbsd.org/pub/NetBSD/misc/dec-docs/ek-pcdsa-ti.pdf.gz

p150, Table 10-6 AlphaStation 200 Series System Motherboard Power Connectors

    J19
Open	1   <-- Power good?
VDD	2   <-- +5V ?
+12V	3
-12V	4
Ground	5
Ground	6

Ground	7
Ground	8
-5V	9
VDD	10
VDD	11
VDD	12


    J20
Ground	1
Ground	2
Ground	3
+3,3V	4
+3,3V	5
+3,3V	6
+3,3V	7
+3,3V	8
+3,3V	9
Ground	10
Ground	11
Ground	12