- Status flags are a key part of most processors, indicating if an arithmetic result is negative, zero, or has a carry, for instance. In this post, I take a close look at the flag circuitry in the Intel 8086 processor (1978), the chip that launched the PC revolution.1 Looking at the silicon die of the 8086 reveals how its flags are implemented. The 8086’s flag circuitry is surprisingly complicated, full of corner cases and special handling. Moreover, I found an undocumented zero register that is used by the microcode.
- Statement Regarding May 21 Article in The Guardian (unitedhealthgroup.com)
The U.S. Department of Justice investigated these allegations, interviewed witnesses, and obtained thousands of documents that demonstrated the significant factual inaccuracies in the allegations. After reviewing all the evidence during its multi-year investigation, the Department of Justice declined to pursue the matter.