Save the world, getting a substantial income from every nation on Earth.
Assuming a generous 0.12 floating point operations per instruction cycle (generous, as the 68000 needed a math co-processor to efficiently perform) and a needed 1.9 Zeta FLOPS then a distributed total of 1.58*10^22 instruction cycles per second are required. According to Ray Kurzweil et al., in 1971 approximately 6 watts were needed per Mega instruction cycle:
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Which would indicate that a 61.5810^16 watt or 94.8 Peta Watt power supply was up there in space ready for use.
The world's current energy usage is about 15 terawatts continuous, so this is substantially more than would be required to supply the world's energy needs for the foreseeable future and clean-up the planet in the process.
Your father was a misguided visionary, and you are a true hero. Now the tricky bit, getting the power down to the people without accidentally roasting them (I leave to the writer) but it should be worth 20 Billion Dollars at current prices. Presumably, interplanetary propulsion by laser would be at your disposal too, so the true space-race begins. Elon Musk weeps into his beer.
As to the computer hardware, you have the first orbiting "Museum of Curiosity".