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  • Member for 8 years
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99 votes
1 answer
30k views

Why did MS-DOS applications built using Turbo Pascal fail to start with a division by zero error on faster systems?

80 votes
9 answers
15k views

Why were CLIs typically light text on dark background, whereas GUIs typically use(d) dark text on light background?

42 votes
5 answers
7k views

Why did so many early microcomputers use the MOS 6502 and variants?

36 votes
2 answers
6k views

How did MS-DOS assign drive letters in the case of more than two floppy disk drives?

34 votes
3 answers
3k views

Why did connecting the IBM PC 3.5" FDD backwards cause the problems it did?

19 votes
3 answers
4k views

How to switch an 80286 from protected to real mode?

19 votes
3 answers
2k views

How did the IBM PC handle multiple physical devices serving memory at the same physical address?

16 votes
4 answers
3k views

Did the Intel 8086/8088 not guarantee the value of SS:SP immediately after RESET?

11 votes
2 answers
2k views

When specifying Intel 80x86 instruction execution time, what is included in the cycle count?

11 votes
1 answer
670 views

How were Microsoft GW-BASIC "protected" files encoded?

8 votes
1 answer
2k views

Which MS-/PC-DOS version was the first to allow multiple partitions to be used?