Omar and Lorraine's user avatar
Omar and Lorraine's user avatar
Omar and Lorraine's user avatar
Omar and Lorraine
  • Member for 7 years, 11 months
  • Last seen this week
110 votes
10 answers
44k views

Why do C to Z80 compilers produce poor code?

66 votes
10 answers
16k views

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

57 votes
8 answers
10k views

How were Western computer chips reverse-engineered in USSR?

56 votes
4 answers
10k views

Why did line printers have 132 columns?

54 votes
11 answers
23k views

Why not use fractions instead of floating point?

52 votes
12 answers
11k views

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

50 votes
3 answers
8k views

Why did the PDP-11 include a JMP instruction?

47 votes
6 answers
12k views

Why does the 6502 have the BIT instruction?

47 votes
3 answers
6k views

What happened to the SEV instruction on the 6502?

44 votes
7 answers
9k views

The history of the NULL pointer

41 votes
4 answers
8k views

What's with the Atari 2600 colors on SECAM?

41 votes
1 answer
3k views

How does the 68060 branch predictor work?

40 votes
4 answers
9k views

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

37 votes
6 answers
9k views

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

37 votes
3 answers
7k views

Why does make only accept tab-indentation?

35 votes
2 answers
3k views

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

34 votes
3 answers
5k views

What are the registers W and Z inside a Z80?

33 votes
2 answers
5k views

Why was UNIX never backported to the PDP-7?

32 votes
6 answers
5k views

Why does the Z80 include the RLD and RRD instructions?

32 votes
1 answer
3k views

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

31 votes
4 answers
4k views

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

30 votes
3 answers
6k views

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

29 votes
6 answers
10k views

Why did ones' complement decline in popularity?

29 votes
2 answers
5k views

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

29 votes
1 answer
5k views

Where is the ancient preprocessor?

29 votes
3 answers
4k views

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

28 votes
6 answers
9k views

How did the early Macintosh computers update the display?

27 votes
4 answers
4k views

Use of undocumented opcodes

27 votes
6 answers
9k views

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

24 votes
1 answer
2k views

When does the VIC-II read the sprite data?

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