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At the heart of the Studio II lies an RCA CDP1802 microprocessor, running at a scorching 1.78 MHz. Coupled with 2K ROM, 512 bytes RAM, and a 64 x 32 pixel monochrome graphics chip, the Studio II was underwhelming even back in 1977. To put things into perspective, the TI-83 calculator (introduced in 1996) operates at 6 MHz and has 32 KB of RAM.
The RCA CDP1802 was a bit of an unusual chip for its day. A version of the 1802 was manufactured by depositing a thin film of silicon on a sapphire wafer. The extremely low electrical conductivity of the sapphire wafer prevented any stray electrical current, caused by radiation bombardment, from spreading to (and possibly damaging) nearby transistors on the chip.
Due to their inherent radiation resistance, six RCA 1802 processors were chosen to control the Galileo spacecraft during its 14 year trek to Jupiter and its moons. They eventually burned up with the rest of Galileo when it was purposely steered into Jupiter's atmosphere in 2003.
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