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The MANIAC 1 documentation (1954) [pdf]

14 点作者 jeremiecoullon大约 4 年前

2 条评论

EvanAnderson大约 4 年前
From page 6, describing the representation of binary numbers: <i>The word bigit is defined as binary digit.</i><p>I&#x27;m kind of sad that &quot;bigit&quot; didn&#x27;t stick.<p>Edit:<p>From page 291, I&#x27;m also enjoying:<p><i>The &quot;turn-on&quot; and &quot;turn-off&quot; procedures for the computer naturally seem to be more in the domain of the engineers rather than that of the programmers; however, the turn-off procedure has been simplified to the extent that the programmers can do it.</i><p>The machine has two different breakpoints types-- &quot;red&quot; and &quot;green&quot;. That&#x27;s an interesting feature. The instruction set architectures I&#x27;m used to don&#x27;t have such a concept and it&#x27;s interesting to think about.
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jeremiecoullon大约 4 年前
The way to represent negative numbers (page 3 of the manual) is really cool: to do &quot;a - b&quot; you add a to the complement of b (with the complement of b being 2 - |b|).<p>It feels really similar to modular arithmetic: -3 = 7 (modulo 10)