Jan 8
知り合いのマル暴の刑事がよく｢交通課に転属になったら辞める。ヤクザのような悪人を相手にするのではなく、一般市民を取り締まるのはつらい｣と言う。SNSでもいきなり攻撃的な罵声を浴びせてるヤツは、話題にかかわらず距離感がバグってる異常者なので、そいつらとやり合うのはさほどしんどくない。
Xユーザーの鈴木智彦／SUZUKI TOMOHIKOさん
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知り合いのマル暴の刑事がよく｢交通課に転属になったら辞める。ヤクザのような悪人を相手にするのではなく、一般市民を取り締まるのはつらい｣と言う。SNSでもいきなり攻撃的な罵声を浴びせてるヤツは、話題にかかわらず距離感がバグってる異常者なので、そいつらとやり合うのはさほどしんどくない。
Xユーザーの鈴木智彦／SUZUKI TOMOHIKOさん
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Huge 74181 is a Classic ALU You Can Actually Understand
You can no longer buy a brand-new 74181, they’ve been out of production for years. All is not lost though, for [Dave’s Dev Lab] have created a facsimile of one on a printed circuit board, using modern single-gate 74-series chips. Why on earth would you want an oversized replica of an outdated logic chip from nearly five decades ago, we hear you ask? The answer lies in education. If you were to embark on learning about the internals of a microprocessor by taking a modern example such as the one that powers the device on which you are reading this, …read more http://pje.fyi/Q1jxTT
74181 ALU design on Altera MAX II CPLD
74181 is 4-bit arithmetic and logic unit introduced by Texas Instruments in March 1970 and it is known for being the first ALU in single package. This chip is no longer in manufacturing but still it is quite popular in CA (computer architecture) courses in many colleges. To test the behavior of this 4-bit ALU we decided to construct it on Altera MAX II CPLD. For this project we choose EPM240T100C5 CPLD and logic design is implement using Altera Quartus II. For logic design we refer Fairchild Semiconductor’s DM74LS181 datasheet. This setup is tested on basic EPM240 series development board with some mechanical switches and couple of LEDs.
The test setup attached into this article is the minimum configuration which anyone can build with small number of commonly available electronic components. All the downloadable content related to this project are available at elect.wikispaces.com.
APOLLO181 HOMEMADE 4-BIT TTL CPU performing an 8-bit multiplication (by ggunderscoreit)
Project Documentation: Here