Skip to main content
cjs's user avatar
cjs's user avatar
cjs's user avatar
cjs
  • Member for 6 years, 7 months
  • Last seen this week
106 votes
Accepted

Why did IBM make the PC BIOS source code public?

46 votes
Accepted

How slow was the 6502 BASIC compared to Assembly

44 votes

What's the relationship betweeen MS-DOS and XENIX?

43 votes
Accepted

Was 10BASE5 a mistake?

41 votes
Accepted

Why did post-8008 CPUs not keep the on-chip stack idea?

39 votes
Accepted

When did 5.25″ floppies exceed the capacity of 8″?

36 votes
Accepted

What was the release date of the MOS 8502?

33 votes
Accepted

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

33 votes
Accepted

What is DRAM refresh and why is the weird Apple II video memory layout affected by it?

29 votes

Was there a clearly identifiable "first computer" to use or demonstrate the use of virtual memory?

28 votes
Accepted

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

28 votes
Accepted

Late 1970s and 6502 chip facilities for operating systems

28 votes
Accepted

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

27 votes
Accepted

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

26 votes
Accepted

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

25 votes
Accepted

What causes the traces to wrinkle like this and should I be worried

25 votes
Accepted

What was the first Lisp implementation that could generate machine code?

24 votes
Accepted

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

23 votes

What was the rationale behind 36 bit computer architectures?

22 votes
Accepted

What do the '80/40' and 'keyboard' buttons on my Apple IIc do?

21 votes

How were the 70s and 80s coin-op machines programmed?

21 votes
Accepted

NES chips usage

21 votes

Intel 8080-based home computers

20 votes
Accepted

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

19 votes

How was a line of Commodore 64 BASIC code stored in its memory?

19 votes

On a Gameboy, what happens when attempting to read/write external RAM while RAM is disabled?

18 votes
Accepted

cprintf printing invisible characters in C program on VIC 20

18 votes

Did this analogue computer from 1960 really have Internet?

17 votes

Could we have avoided the whole UTF-16 fiasco?

17 votes

Where did the free parameters of IEEE 754 come from?

1
2 3 4 5
7