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simple 4-BIT CPU with 74-serials chip，origin by Kaoru Tonami in his book “How to build a CPU”

Home Page: https://www.amazon.com/Shi-x304-No-Tsukurikata-Dejitaru/dp/4839909865/ref=sr_1_1?ie=UTF8&qid=1447595397&sr=8-1&keywords=4839909865

License: BSD 3-Clause "New" or "Revised" License

C 2.10% Assembly 0.28% HTML 97.62%

td4-4bit-cpu's Introduction

TD4

自己动手做CPU 之 TD4 前言

自己动手做CPU 之 TD4 原理分析0-系统综述

自己动手做CPU 之 TD4 原理分析1-[时钟、复位]

自己动手做CPU 之 TD4 原理分析2-[存储器、输入、输出]

自己动手做CPU 之 TD4 原理分析3-[控制器、运算器]

#LOAD0 = D6 | D7
#LOAD1 = #D6 | D7
#LOAD2 = #(#D6 & D7)
#LOAD3 = #(D6 & D7 & (#C | D4))
SEL_A = D4 | D7
SEL_B = D5

自己动手做CPU 之 TD4 PCB及元器件

自己动手做CPU 之 TD4 焊接测试0-说明

A. 先焊接尺寸小，低的元器件，再焊接高的元器件，推荐焊接顺序如下:
1. 发光LED，二极管1N4148，直插电阻，USB接口。
2. IC插座
3. 8位拨码开关、4位拨码开关
4. 按键开关，电解电容，拨动开关

B. 注意芯片插座，8位拨码开关和4位拨码开关的焊接方向

自己动手做CPU 之 TD4 焊接测试1-[焊接]

自己动手做CPU 之 TD4 焊接测试2-[测试]

自己动手做CPU 之 TD4 后记

架构

  1. RAM
  2. 4bit -> 8bit
  3. ALU
  4. 中断

指令

  1. 算术逻辑指令
  2. 寻址方式（立即数寻址、相对寻址、寄存器寻址等）
  3. call push pop

reference0:
指令格式
TD4套件

reference1:
https://hackaday.io/project/8442-ttl-based-4-bit-cpu
https://hackaday.io/project/26215-td4-cpu
http://kamakurium.com/wp-content/uploads/2016/01/cpu_td4
http://visual6502.org/
http://www.4004.com/

td4-4bit-cpu's People

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