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OmarL
  • Member for 6 years, 2 months
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98 votes
9 answers
38k views

Why do C to Z80 compilers produce poor code?

66 votes
10 answers
15k views

How was C ported to architectures that had no hardware stack?

55 votes
8 answers
9k views

How were Western computer chips reverse-engineered in USSR?

52 votes
12 answers
11k views

What early home computers have more than one CPU, where both could be used by the programmer? [closed]

51 votes
3 answers
9k views

Why did line printers have 132 columns?

50 votes
3 answers
7k views

Why did the PDP-11 include a JMP instruction?

49 votes
11 answers
21k views

Why not use fractions instead of floating point?

42 votes
7 answers
9k views

The history of the NULL pointer

42 votes
3 answers
6k views

What happened to the SEV instruction on the 6502?

40 votes
4 answers
9k views

What determines the color of every 8th pixel on the Apple II?

39 votes
1 answer
3k views

How does the 68060 branch predictor work?

39 votes
6 answers
10k views

Why does the 6502 have the BIT instruction?

37 votes
3 answers
4k views

Why does make only accept tab-indentation?

37 votes
4 answers
7k views

What's with the Atari 2600 colors on SECAM?

37 votes
6 answers
9k views

Why does the Cray 2 use 400 Hz power, and why generate that from motors?

34 votes
3 answers
4k views

What are the registers W and Z inside a Z80?

34 votes
2 answers
3k views

Can the two CPUs in a Commodore 128 run at the same time?

33 votes
2 answers
5k views

Why was UNIX never backported to the PDP-7?

32 votes
1 answer
3k views

How did the various Soviet ZX Spectrum clones support Cyrillic text?

31 votes
4 answers
3k views

What motivated the weird boolean instruction repertoire of the PDP-11?

29 votes
2 answers
5k views

Why did Sinclair choose the Z80 for its range of home computers?

29 votes
6 answers
10k views

Why did ones' complement decline in popularity?

28 votes
3 answers
5k views

How does Space Invaders on the Atari 2600 display all the aliens?

28 votes
6 answers
9k views

How did the early Macintosh computers update the display?

28 votes
3 answers
4k views

Why does an instruction include the address of the next instruction on the IBM 650?

26 votes
1 answer
4k views

Where is the ancient preprocessor?

25 votes
5 answers
8k views

Why did Western designs suddenly overtake native Russian ones in the USSR?

24 votes
4 answers
3k views

Use of undocumented opcodes

23 votes
6 answers
3k views

What was the first computer to support Arabic writing?

23 votes
6 answers
3k views

ZX Spectrum tokenisation

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