Retrocomputing

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earned this badge 801 times.
Was bootloading from punch cards possible on System/370 machines?
Awarded Nov 27 at 15:25
What happens if an invalid opcode is executed on a 287/387 math coprocessor?
Awarded Nov 26 at 15:51
Commodore 64 - any way to safely plug in a cartridge when the power is on?
Awarded Nov 23 at 20:27
What was the first laptop to support two external monitors?
Awarded Nov 9 at 11:36
Why were those colors chosen to be the default palette for 256-color VGA?
Awarded Nov 8 at 7:20
Why have consumer-level graphing calculators seemingly not developed in 20+ years?
Awarded Nov 5 at 17:26
What was the legal arrangement between author, publisher and end user for 'type-in programs' in old computer magazines?
Awarded Nov 4 at 21:12
Who invented file extensions in file names?
Awarded Nov 1 at 22:31
Was QotD (and RFCs 862-867) actually insecure?
Awarded Oct 25 at 20:55
Terminology of what is termed "CPU" and what is "computer"
Awarded Oct 25 at 18:16
What sort of LCDs are used by the Game Boy/TI-83 calculator/etc.?
Awarded Oct 23 at 8:19
What was the first desktop computer with fully-functional input and output?
Awarded Oct 21 at 22:10
Were printed manuals for HP PCL or GL ever published?
Awarded Oct 19 at 11:18
How fast did the ARM-1 access memory?
Awarded Oct 17 at 18:51
How does DRAM refresh work in the Leningrad?
Awarded Oct 13 at 1:41
Why did the Motorola 68000 processor family fall out of use in personal computers in the 21st century?
Awarded Oct 6 at 23:36
Why was BASIC's INT() a floor, and not a truncate?
Awarded Oct 6 at 16:05
How did early computers deal with calculations involving pounds, shillings, and pence?
Awarded Oct 4 at 20:41
What does it mean to "publish machine code"?
Awarded Oct 4 at 3:07
What's the correct Unicode code point for the Apple IIe's "delete" symbol?
Awarded Oct 1 at 12:57
How late were 80-column punched cards relevant?
Awarded Sep 28 at 21:40
When was the end of the floppy-only IBM PC clone?
Awarded Sep 28 at 12:46
Why did the Bell 103 modem specification use 1070Hz, 1270Hz, 2025Hz and 2225Hz?
Awarded Sep 28 at 7:28
What made the ENIAC "programmable"?
Awarded Sep 25 at 0:31
How could early computers perform data operations before John von Neumann proposed the concept of ALU?
Awarded Sep 18 at 16:51
Why does the Manchester Baby have two jump instructions?
Awarded Sep 13 at 9:46
Why does the LGP-30 leave half its instruction word unused?
Awarded Sep 12 at 16:04
Did the Z8000 ever hit the home computer market?
Awarded Sep 5 at 14:45
Floppy drive detection on an IBM PC 5150 by PC/MS-DOS
Awarded Aug 21 at 13:41
Why do sprites lag behind a scrolling map in first-generation Pokémon games?
Awarded Aug 18 at 9:51
What's the convention for < > low/high-byte in 8-bit assembler?
Awarded Aug 17 at 0:34
How did the ZX80 RAM pack use DRAM?
Awarded Aug 12 at 21:02
Did the IBM ServiceFree really reach 80 MIPS in 1975?
Awarded Aug 10 at 11:06
How did the Fairchild Channel F provide a 2K frame buffer?
Awarded Aug 8 at 19:12
Why were OS/360 PL/I procedure calls so expensive in terms of stack space?
Awarded Aug 7 at 0:36
Did the IBM 1401 have much better code density than the 360?
Awarded Aug 4 at 0:47
Where to obtain 3c509b empty boot ROM chip?
Awarded Aug 3 at 14:52
How did Altair 8800 interrupts work?
Awarded Aug 2 at 8:52
Is the substitution "ss" for "ß" on mainframes due to the SS being the largest customer of IBM punched cards outside the USA?
Awarded Aug 1 at 8:40
Undocumented ModR/M byte combinations
Awarded Jul 31 at 0:32
Why does the Commodore 64 have 4K of non-banked RAM at $C000?
Awarded Jul 26 at 5:07
Were cartridge slots cheaper at the back?
Awarded Jul 22 at 17:47
Did type-in-programs or type-in-listings teach programming in the 70s and 80s or was it just tedious typing of the source code?
Awarded Jul 19 at 19:40
Denys Fisher, of Spirograph fame, using a computer late 1976, early 1977
Awarded Jul 17 at 9:31
Why did the Apple III have more heating problems than the Altair?
Awarded Jul 10 at 3:27
How did the IBM 360 detect memory errors?
Awarded Jul 8 at 6:20
How much space did the 68000 registers take up?
Awarded Jul 7 at 13:51
What did it cost the 8086 to support unaligned access?
Awarded Jul 6 at 9:48
How did the OS/360 link editor achieve overlay structuring at linkage time without annotations in the source code?
Awarded Jul 4 at 22:10
Creating 8086 binary larger than 64 KiB using NASM or any other assembler
Awarded Jul 3 at 14:01
Difference between program and application
Awarded Jun 25 at 11:51
Do any FAT8 filesystem images survive?
Awarded Jun 24 at 21:06
Why did the VT100 terminal have to be connected to a host computer if it already had a processor?
Awarded Jun 14 at 19:21
How was the @ sign added to keyboards and character sets?
Awarded Jun 14 at 7:17
Has there ever been a C compiler where using ++i was faster than i++?
Awarded Jun 12 at 6:11
Is it possible to write unit tests in Applesoft BASIC?
Awarded Jun 2 at 7:42
Is it possible to raise the frequency of command input to the processor in this way?
Awarded Jun 1 at 10:17
What are these keys on the БК-0010-series keyboards, and what do they do?
Awarded May 31 at 11:41
Where/when did the sentence "a good developer is lazy" first appear?
Awarded May 22 at 21:56
MC68000: address error in initial PC
Awarded May 22 at 15:08
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