On the IBM PC, the 9th bit was the parity bit. https://en.wikipedia.org/wiki/RAM... | Hacker News

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orionblastar on May 3, 2025 | parent | context | favorite | on: Cross-Platform Software Development – Yes, Bytes C...

On the IBM PC, the 9th bit was the parity bit. https://en.wikipedia.org/wiki/RAM_parity

icedchai on May 3, 2025 [–]

The CPU couldn't directly manipulate that 9th bit, though.

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