# Tag Info

### How were Zuse Z22 Instructions Encoded?

[Preface: this is about a very early architecture, defined way before and completely independently of today's canon, formed by IBM's /360. When reading, it might be useful to take terms used at their ...
• 230k
Accepted

### What is the instruction set of the Z4?

Horst Zuse (Konrad Zuse's son, a computer science professor by trade) has a homepage where he supplies (and sells) various pieces of information, booklets and CDs and DVDs about his father's work. ...
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Accepted

### How did exception handling work in the Plankalkül language?

I will be citing from the 1945 version of Konrad Zuse's paper Der Plankalkül, as published by the Zuse archive in a typeset version with LaTeX. The Plankalkül language is very modular in nature. It ...
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### How did exception handling work in the Plankalkül language?

From that paper somebody linked to (Der Plankalkül, pp. 162-3): Es werden folgende Fälle als Ausnahmewerte dargestellt: (a) Der Wert y ist genau Null (K1.2). (b) Der Wert y ist sehr klein (K1.5) (c) ...
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Accepted

### Floating Point on Konrad Zuse's computers

Konrad Zuse's computers all did floating point in hardware. I am interested in implementation details here. The very best way here would be Raul Rojas books. Most important: Die Rechenmaschinen von ...
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### What is the instruction set of the Z4?

Konrad Zuse—the first relay computer The Z4 made use of a unit called a Planfertigungsteil (program construction unit),which was used to produce punch tapes, containing instructions for the Z4 in a ...
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### Floating Point on Konrad Zuse's computers

there are more solutions to speed up the bit shifts in general: align shifts to data word Simply use your platform WORD bit width and align your shifts to it... That means if I have an 8-bit data ...
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### How did exception handling work in the Plankalkül language?

Programming languages routinely having direct support for exception handling is a relatively new development. Well, if you can call 3 decades plus "new" in an industry that's less than a ...
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### How does the floating point conversion in Zuse's machines work?

Actually, mechanical translation by Google works remarkably well. I found that I needed to first copy the text to my text editor (emacs, in my case) in order to convert the umlauts into proper Unicode ...
1 vote

In simple, early instruction sets, saving the program counter and doing arithmetic on it wasn't rare. One might, for example, embed some data in the program just after a subroutine call, use the ...
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1 vote

### How does the floating point conversion in Zuse's machines work?

My German is rubbish. However, I know enough to make liberal use of Ctrl + F and a dictionary using this PDF version of the patent to hopefully extract the information you want. Page numbers are ...
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1 vote

### What is the instruction set of the Z4?

This page, put online by his son, gives a good overview of the Z4 instruction set - most important, it's in English as well :)) (I know, this is a link only answer, but I'm on the run, more detailed ...
• 230k

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