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10 votes
1 answer
373 views

Were there Any Applications Making Explicit Use of the MDA's Colour Capabilities?

6 votes
2 answers
489 views

What was the purpose of the “key” pin of the P8 connector of the IBM PC PSU, and why was it changed to +5V with the AT?

4 votes
2 answers
312 views

ISA Extension cards using more than 64kB

10 votes
5 answers
6k views

When did the PC bus start slowing access to video RAM?

25 votes
5 answers
7k views

What were wait-states, and why was it only an issue for PCs?

5 votes
1 answer
315 views

Documentation for the SALUT preprocessor of the IBM Macro Assembler 2.0

33 votes
3 answers
3k views

How was the 80186 incompatible with the IBM PC?

19 votes
6 answers
13k views

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19 votes
3 answers
3k views

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21 votes
5 answers
4k views

How can I reverse-engineer the game Wizardry (1981) for PC, based on UCSD Pascal?

7 votes
1 answer
467 views

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8 votes
1 answer
575 views

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7 votes
3 answers
1k views

Were there any PCs where you could switch Turbo Mode via the keyboard?

62 votes
7 answers
11k views

Why did some old MS-DOS games lack the ability to exit them?

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