05.09.2015 Views

计 算 机 组 织 与 系 统 结 构

打印版 - 北京大学微处理器研究开发中心

打印版 - 北京大学微处理器研究开发中心

SHOW MORE
SHOW LESS
  • No tags were found...

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Babbage’s<br />

Difference Engine 2<br />

and<br />

Analytical Engine<br />

1834 Babbage Analytical Engine<br />

The Mill<br />

The Store<br />

Printer<br />

Punch<br />

Operation<br />

Cards<br />

Variable<br />

Cards<br />

Program<br />

北 京 大 学 <strong>计</strong> <strong>算</strong> <strong>机</strong> 科 学 技 术 <strong>系</strong><br />

北 京 大 学 微 处 理 器 研 究 开 发 中 心<br />

北 京 大 学 <strong>计</strong> <strong>算</strong> <strong>机</strong> 科 学 技 术 <strong>系</strong><br />

北 京 大 学 微 处 理 器 研 究 开 发 中 心<br />

Babbage Analytical Engine<br />

• The Store: Memory unit consisting of counter<br />

wheels<br />

• The Mill: The arithmetic unit capable of 4 operations<br />

used a pair of register and produced results stored<br />

in another register in the store<br />

• Operation Cards: Specified one of Four operations<br />

• Variable Cards: Specified the memory location to be<br />

used<br />

• Output: Printer or punch<br />

Analytic Engine<br />

The first conception of a general-purpose computer<br />

1. The store in which all variables to be operated upon, as<br />

well as all those quantities which have arisen from the<br />

results of the operations are placed.<br />

2. The mill into which the quantities about to be operated<br />

upon are always brought.<br />

The program ogam<br />

Operation variable1 variable2 variable3<br />

An operation in the mill required feeding two punched cards<br />

and producing a new punched card for the store.<br />

An operation to alter the sequence was also provided!<br />

北 京 大 学 <strong>计</strong> <strong>算</strong> <strong>机</strong> 科 学 技 术 <strong>系</strong><br />

北 京 大 学 微 处 理 器 研 究 开 发 中 心<br />

北 京 大 学 <strong>计</strong> <strong>算</strong> <strong>机</strong> 科 学 技 术 <strong>系</strong><br />

北 京 大 学 微 处 理 器 研 究 开 发 中 心

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!