Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Showing posts with label
math
.
Show all posts
Showing posts with label
math
.
Show all posts
Qui-binary arithmetic: how a 1960s IBM mainframe does math
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The IBM 1401 computer uses an unusual technique called qui-binary arithmetic to perform arithmetic. In the early 1960s, the IBM 1401 wa...
3 comments:
Mining Bitcoin with pencil and paper: 0.67 hashes per day
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This article is now available in Japanese: 紙と鉛筆でビットコインをマイニング：1日に0.67ハッシュ and Russian: Майним Bitcoin с помощью бумаги и ручки . I decided...
83 comments:
Simulating a TI calculator with crazy 11-bit opcodes
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I've built a register-level simulator of a 1974 TI calculator chip that shows what actually happens inside a calculator when you perform...
5 comments:
The 6502 overflow flag explained mathematically
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The overflow flag on the 6502 processor is a source of myth and confusion. In this article, I explain signed and unsigned binary arithmetic...
17 comments:
A new multi-branch algorithm to render rational-exponent Mandelbrot fractals: Part I
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If you came here from Hacker News, thanks for visiting. You might want to check out the Hacker News comment thread too. The Mandelbrot fr...
8 comments:
The Mathematics of Volleyball
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Recently I was at a multi-day volleyball tournament, which gave me plenty of time to ponder the mathematics of the game. At different point...
14 comments:
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