Retrocomputing

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earned this badge 104 times.
Difference between the 8255 and 8042 PPIs
Awarded Feb 21 at 21:57
Did the Amiga change CPU frequencies when switching between PAL and NTSC mode?
Awarded Jan 19 at 13:17
Did Microsoft really reserve secret APIs in Windows?
Awarded Dec 24, 2022 at 21:57
Why does the FRE() function in CBM BASIC v2 return negative values?
Awarded Dec 17, 2022 at 1:03
Do/did mechanical hard drives constantly spin the discs?
Awarded Sep 30, 2022 at 5:32
In the ISO 1990 C standard library, what was the rationale for having memcpy return one of its inputs?
Awarded Jun 22, 2022 at 10:25
Is there an equivalent of "#pragma once" in RGBASM (Gameboy DMG assembly language)?
Awarded Jun 15, 2022 at 10:36
How and why did the ZX Spectrum use so many voltages?
Awarded Jun 8, 2022 at 20:12
Where is DOS stored in memory when a program starts?
Awarded Jun 2, 2022 at 17:32
What information was "off limits" to IBM PC clone BIOS authors?
Awarded Mar 31, 2022 at 6:27
How did installers locate the Program Files directory on Windows 95?
Awarded Mar 16, 2022 at 14:35
How did old computers address far more than 64K of memory despite only having a 16 bit address bus?
Awarded Jan 15, 2022 at 11:33
Does the NES handle unlisted processor instructions differently from the Famicom?
Awarded Jan 12, 2022 at 16:41
Was there ever a microcomputer with a full-size keyboard and a hex numpad?
Awarded Dec 31, 2021 at 4:26
Does 10BASE-T need more sophisticated electronics than 10BASE5/10BASE2?
Awarded Nov 21, 2021 at 20:42
If a PS/2 device on a 32-bit x86 sends a byte to the IO port 0x60 and you read it, what happens next?
Awarded Oct 22, 2021 at 14:47
Is there a way to work around the maximum clock rate of Z80 PIO chips?
Awarded Oct 16, 2021 at 13:56
What's this computer in the 1988 movie "Vampire's Kiss"?
Awarded Oct 10, 2021 at 12:27
Cleaning buckling spring keyboards
Awarded Sep 20, 2021 at 21:51
What's the origin of terminating strings by setting the high bit of the last character?
Awarded Jul 24, 2021 at 6:46
Did any notable product use Intel's first RAM?
Awarded Apr 29, 2021 at 15:02
Was there a specific benefit to inverted (XOR) mouse cursors other than aesthetics?
Awarded Mar 31, 2021 at 3:11
Did any equipment ship with odd serial parity by default?
Awarded Mar 11, 2021 at 19:16
Intel 386 multiply bug
Awarded Feb 2, 2021 at 5:10
z80 crashes after executing some instructions
Awarded Dec 1, 2020 at 7:58
ZX Spectrum 48k Power Supply outputting 15V
Awarded Nov 11, 2020 at 23:57
Did computers come with circuit diagrams?
Awarded Nov 9, 2020 at 6:11
When IPv6 was designed were there any specific considerations for other planets?
Awarded Oct 22, 2020 at 22:41
Why are old CPUs like MOS Technology 6502 and Motorola 68000 considered better for real time systems applications than modern x86 based CPUs?
Awarded Oct 17, 2020 at 9:12
Z8410 DMA chip as GPU?
Awarded Oct 16, 2020 at 4:07
How to do I/O with emulation code?
Awarded Oct 7, 2020 at 6:42
How does memory addressing/mapping work in 8-bit systems?
Awarded Sep 11, 2020 at 11:26
Were there really any cost savings in Sinclair QL because of it being 8-bit design with 8-bit bus 68k CPU?
Awarded Jul 11, 2020 at 2:13
Alternatives for TurboVision on DOS
Awarded May 2, 2020 at 21:20
How to use ISA card in modern PC
Awarded Feb 25, 2020 at 15:55
Mysterious things happening to stack when running a debug session
Awarded Nov 29, 2019 at 12:05
What tools were used in late MS-DOS era for reverse engineering and patching binary executables?
Awarded Nov 24, 2019 at 18:15
Game Boy DMG to VGA
Awarded Jul 24, 2019 at 15:20
Formatting a 720K floppy disk over USB fails with Windows 10
Awarded Jul 5, 2019 at 8:40
How to get a plain text file version of a CP/M .BAS (M-BASIC) program?
Awarded May 18, 2019 at 13:00
Did any laptop computers have a built-in 5¼-inch floppy drive?
Awarded Apr 12, 2019 at 1:05
Why were 3D games on the Amiga not faster than on similar 16 bit systems like the Atari ST
Awarded Apr 11, 2019 at 19:40
Why could you hear an Amstrad CPC working?
Awarded Apr 11, 2019 at 2:30
How can I create a pipe for stdin/stdout of command.com (or 4dos.com) in C or a batch file?
Awarded Apr 7, 2019 at 19:15
Fastest non-emulated CP/M Z80-based computer ever built?
Awarded Mar 27, 2019 at 17:25
Did CP/M support custom hardware using device drivers?
Awarded Mar 14, 2019 at 14:40
Did 5.25" floppies undergo a change in magnetic coating?
Awarded Mar 5, 2019 at 0:20
Attaching a CD-rom drive for Amiga 500
Awarded Mar 4, 2019 at 21:15
What are Hollerith machines?
Awarded Feb 20, 2019 at 17:35
Common practices of programming the AY-3-8910 on Amstrad CPC: via Firmware routines or directly?
Awarded Feb 9, 2019 at 20:35
What was the effect of the Video Game Crash of 1983 outside of North America?
Awarded Feb 8, 2019 at 11:45
How did the early Macintosh computers update the display?
Awarded Feb 7, 2019 at 9:45
How can a peripheral work on both the ZX81 and on the ZX Spectrum?
Awarded Feb 4, 2019 at 20:55
Weak bits on floppy for copy protection
Awarded Jan 15, 2019 at 14:40
Cassettes that used stereo?
Awarded Nov 13, 2018 at 12:40
Why was preemptive multitasking so slow in coming to consumer OS's?
Awarded Nov 12, 2018 at 8:50
What was the typical thickness of fanfold printer paper?
Awarded Nov 5, 2018 at 1:10
What is the instruction set of the Z4?
Awarded Oct 26, 2018 at 21:30
How did the ZX80 store both a useful program and screen memory?
Awarded Oct 15, 2018 at 16:35
Last computer not to use octets / 8-bit bytes
Awarded Oct 11, 2018 at 21:40
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