- 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.
- Transnistria (Wikipedia)
Transnistria, or Pridnestrovie, officially known as the Pridnestrovian Moldavian Republic (PMR), is a breakaway state internationally recognized as part of Moldova. Transnistria controls most of the narrow strip of land between the Dniester river and the Moldova–Ukraine border, as well as some land on the other side of the river’s bank. Its capital and largest city is Tiraspol. Transnistria is officially designated by the Republic of Moldova as the Administrative-Territorial Units of the Left Bank of the Dniester (Romanian: Unitățile Administrativ-Teritoriale din stînga Nistrului) or as Stînga Nistrului (“Left (Bank) of the Dniester”).