Retrocomputing

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earned this badge 40 times.
How did "Super Wonder Boy (in Monsterland)" defeat the Multiface One?
Awarded Jul 28 at 12:16
What is the serial protocol commonly used over RS-232 (among other links) and where did it come from?
Awarded May 30 at 18:55
Why did 1970s front panels prefer momentary toggle switches to push buttons?
Awarded Mar 13 at 18:17
Are there any open-source C64 DOS wedges and fast loaders?
Awarded Dec 28, 2022 at 17:26
What was the first Lisp implementation that could generate machine code?
Awarded Dec 25, 2022 at 3:21
How did LaFarr Stuart's "Forth without an input buffer" work?
Awarded Sep 16, 2022 at 19:49
How did the IBM 5153 color display detect and modify the signal to make low-intensity yellow into "brown"?
Awarded Jul 27, 2022 at 19:43
Could the Commodore 64 have used the 6522 VIA instead of the 6526 CIA?
Awarded Jun 25, 2022 at 17:25
What are examples of providing non-RST instructions for 8080 interrupts?
Awarded Jun 22, 2022 at 9:32
Why was the 6502 version of Microsoft BASIC coded like the 8080 and 6800 versions even though this was rather inefficient?
Awarded Jun 7, 2022 at 10:17
What is the exact bus protocol used by the C64/C128 REU?
Awarded Jan 7, 2022 at 18:48
Could the Z80 do interference-free video as the 6502 could?
Awarded Nov 17, 2021 at 16:20
What 8-bit microcomputer systems multiplexed multiple physical ports on a single controller?
Awarded Nov 5, 2021 at 20:32
Why is the original Altair BASIC (for the 8080 CPU) source code not available on-line?
Awarded Oct 7, 2021 at 20:35
What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?
Awarded May 19, 2021 at 6:08
How do I clean/refurbish an Apple IIc Keyboard?
Awarded May 14, 2021 at 1:27
Is the Game Boy Sharp LR35902 object-compatible with the 8080/Z-80?
Awarded Apr 16, 2021 at 2:58
How was text handled on the Amstrad CPC 464?
Awarded Feb 24, 2021 at 6:25
Which cartridges were typically used together on Commodore 64 systems?
Awarded Jan 26, 2021 at 10:07
Did any devices use the Commodore 64 joystick ports as outputs or two-way communications ports?
Awarded Sep 22, 2020 at 21:04
How do you send code to a Commodore disk drive and run it?
Awarded Sep 9, 2020 at 1:58
Where and when did the `0x` convention for hexadecimal literals originate?
Awarded Aug 16, 2020 at 16:00
For how long can you safely stop the clock on an NMOS 6502?
Awarded Apr 13, 2020 at 3:15
Why did the C64 use a separate "CAN" +5 V power supply for some chips?
Awarded Apr 9, 2020 at 20:15
Why did some MOS 6502 packages have holes in them?
Awarded Mar 29, 2020 at 10:05
Why did the Apple IIe use a 2 MHz-rated 6502, even though it ran at only 1 MHz?
Awarded Mar 18, 2020 at 3:05
When low-level formatting a floppy, how does one ensure any existing sector markers are overwritten?
Awarded Mar 2, 2020 at 10:20
How did the Apple 1 video circuit work?
Awarded Jan 22, 2020 at 3:50
Did all integrated Commodore PET monitors always use 60 Hz refresh?
Awarded Dec 14, 2019 at 3:40
Why isn't the WDC 65816 available in "externally" 16-bit versions?
Awarded Dec 12, 2019 at 0:30
What are my modern options for loading programs and data files on the Apple IIc?
Awarded Nov 14, 2019 at 18:15
How does the C64 get an accurate TOD clock on both 60 Hz and 50 Hz power?
Awarded Nov 13, 2019 at 4:15
On what Apple II and II+ keyboards can the ']' character be generated?
Awarded Oct 9, 2019 at 3:55
Under what circumstances would RAM locations 0 and 1 be written and/or read on the C64?
Awarded Sep 24, 2019 at 20:50
What are uses of the byte after BRK instruction on 6502?
Awarded Sep 11, 2019 at 22:45
How did the Altair 8800 front panel load the program counter?
Awarded Sep 4, 2019 at 8:30
What's the timeline of Motorola 6800-family CPUs from 1974 to 1979?
Awarded Aug 6, 2019 at 3:45
Why is the unchangable Nintendo Game Boy logo in the cartridge?
Awarded Jul 23, 2019 at 4:20
What does a Nintendo Game Boy do when turned on without a game cartridge inserted?
Awarded Jul 22, 2019 at 6:40
What LISP compilers and interpreters were available for 8-bit machines?
Awarded Jun 3, 2019 at 9:05

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