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cjs
  • Member for 6 years, 6 months
  • Last seen more than a week ago
48 votes
1 answer
6k views

Where and when did the `0x` convention for hexadecimal literals originate?

33 votes
3 answers
4k views

How did the IBM 5153 color display detect and modify the signal to make low-intensity yellow into "brown"?

29 votes
3 answers
7k views

What are uses of the byte after BRK instruction on 6502?

27 votes
3 answers
28k views

What does a Nintendo Game Boy do when turned on without a game cartridge inserted?

24 votes
5 answers
6k views

Why is the unchangeable Nintendo Game Boy logo in the cartridge?

23 votes
1 answer
3k views

How does the C64 get an accurate TOD clock on both 60 Hz and 50 Hz power?

21 votes
3 answers
4k views

What LISP compilers and interpreters were available for 8-bit machines?

21 votes
3 answers
2k views

How did the Altair 8800 front panel load the program counter?

21 votes
2 answers
1k views

How did LaFarr Stuart's "Forth without an input buffer" work?

21 votes
1 answer
1k views

How did "Super Wonder Boy (in Monsterland)" defeat the Multiface One?

20 votes
4 answers
4k views

What is the serial protocol commonly used over RS-232 (among other links) and where did it come from?

20 votes
1 answer
2k views

How did the Apple 1 video circuit work?

20 votes
1 answer
3k views

When low-level formatting a floppy, how does one ensure any existing sector markers are overwritten?

19 votes
1 answer
3k views

What's the timeline of Motorola 6800-family CPUs from 1974 to 1979?

17 votes
2 answers
7k views

Is the Game Boy Sharp LR35902 object-compatible with the 8080/Z-80?

17 votes
3 answers
2k views

For how long can you safely stop the clock on an NMOS 6502?

17 votes
1 answer
3k views

Why was the 6502 version of Microsoft BASIC coded like the 8080 and 6800 versions even though this was rather inefficient?

16 votes
4 answers
2k views

How do I properly exit a program and return to the CCP in CP/M?

16 votes
5 answers
3k views

Why isn't the WDC 65816 available in "externally" 16-bit versions?

15 votes
1 answer
1k views

Why did some MOS 6502 packages have holes in them?

15 votes
1 answer
2k views

Why did the Apple IIe use a 2 MHz-rated 6502, even though it ran at only 1 MHz?

15 votes
1 answer
1k views

Under what circumstances would RAM locations 0 and 1 be written and/or read on the C64?

14 votes
1 answer
2k views

Why is the original Altair BASIC (for the 8080 CPU) source code not available on-line?

13 votes
1 answer
3k views

On what Apple II and II+ keyboards can the ']' character be generated?

13 votes
3 answers
1k views

What are some tracing disassemblers for the Z80

13 votes
6 answers
2k views

Could the Z80 do interference-free video as the 6502 could?

12 votes
1 answer
2k views

What is the exact bus protocol used by the C64/C128 REU?

12 votes
2 answers
1k views

Did all integrated Commodore PET monitors always use 60 Hz refresh?

12 votes
3 answers
2k views

How do I clean/refurbish an Apple IIc Keyboard?

12 votes
2 answers
1k views

What are my modern options for loading programs and data files on the Apple IIc?