Comment ATX power supply (Score 1) 66
I just replaced a fried power supply from a 30 years old 8 bit computer. I used a modern ATX power supply and it works fine.
As noted earlier, the only problem is the missing -5V line, which existed in AT power supplies but was removed in ATX. But many ATX power supplies still offer the -5V line through the "reserved" pin 20 (it faces the grey wire "power good" on pin 8). If there is a white wire there, you have it.