- The ARM1 processor’s flags, reverse engineered (righto.com)
This article reverse-engineers the flag circuits in the ARM1 processor, explaining in detail how the flags are generate, controlled, and used. Condition flags are a key part of most computers, since they allow the computer to change what it does based on various conditions. The flags keep track of conditions such as a value being negative or zero or an overflow happening. Processors may also have status flags to control modes such as running in user mode versus protected (kernel) execution. The ARM1 processor stores these flags in a special register called the Processor Status Register (PSR).
- Samoa (Wikipedia)
Samoa, officially the Independent State of Samoa and known until 1997 as Western Samoa (Samoan: Sāmoa i Sisifo), is an island country in Polynesia, consisting of two main islands (Savai’i and Upolu); two smaller, inhabited islands (Manono and Apolima); and several smaller, uninhabited islands, including the Aleipata Islands (Nuʻutele, Nuʻulua, Fanuatapu and Namua). Samoa is located 64 km (40 mi) west of American Samoa, 889 km (552 mi) northeast of Tonga, 1,152 km (716 mi) northeast of Fiji, 483 km (300 mi) east of Wallis and Futuna, 1,151 km (715 mi) southeast of Tuvalu, 519 km (322 mi) south of Tokelau, 4,190 km (2,600 mi) southwest of Hawaii, and 610 km (380 mi) northwest of Niue. The capital and largest city is Apia. The Lapita people discovered and settled the Samoan Islands around 3,500 years ago. They developed a Samoan language and Samoan cultural identity.
