User cjs

44

votes

1

answer

5k

views

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

history hexadecimal

Aug 20 at 13:37 chicks 303

5

26

votes

3

answers

17k

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

game-boy

Jul 22 '19 at 8:19 Kaz 7,276

2

25

votes

3

answers

4k

views

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

6502 interrupt

Sep 13 '19 at 9:02 Community♦ 1

3

19

votes

5

answers

3k

views

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

game-boy

Mar 16 at 18:52 Mr. Beeblebrox 41

5

19

votes

1

answer

3k

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

floppy-disk

Mar 2 '20 at 13:08 bodgit 253

1

19

votes

1

answer

2k

views

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

commodore-64 power

Nov 13 '19 at 12:32 Raffzahn 132k

2

16

votes

3

answers

1k

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

6502 dma

Apr 16 '20 at 15:02 hotpaw2 6,377

1

16

votes

1

answer

2k

views

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

6800

Aug 14 '19 at 11:38 cjs 17.5k

1

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?

apple-ii 6502

Mar 17 '20 at 3:32 cjs 17.5k

2

15

votes

1

answer

751

views

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

commodore-64 memory

Jan 3 '20 at 21:39 Community♦ 1

4

15

votes

3

answers

1k

views

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

altair-8800 front-panel

Sep 1 '19 at 12:18 Community♦ 1

6

14

votes

3

answers

2k

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

history 8-bit-microcomputers lisp

Sep 21 '19 at 5:59 cjs 17.5k

1

13

votes

5

answers

2k

views

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

65816

May 7 '20 at 22:41 Will Hartung 8,115

2

12

votes

3

answers

940

views

How do you send code to a Commodore disk drive and run it?

commodore disk-drive

Sep 7 at 11:08 OmarL 29.1k

1

12

votes

0

answers

541

views

Why did some MOS 6502 packages have holes in them?

6502 chip

Mar 28 '20 at 9:29 Community♦ 1

1

12

votes

1

answer

671

views

How did the Apple 1 video circuit work?

video apple-1

Jan 22 '20 at 5:42 cjs 17.5k

3

12

votes

2

answers

959

views

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

apple-ii data-transfer

Nov 13 '19 at 1:00 Nick Westgate 6,112

1

12

votes

1

answer

2k

views

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

apple-ii keyboards

Oct 9 '19 at 8:36 Community♦ 1

11

votes

2

answers

939

views

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

commodore crt-monitor commodore-pet

Dec 13 '19 at 2:31 cjs 17.5k

1

10

votes

4

answers

823

views

Did any devices use the Commodore 64 joystick ports as outputs or two-way communications ports?

commodore-64 commodore joystick vic-20 input-devices

Sep 15 at 15:59 Retrograde 3,117

3

10

votes

1

answer

922

views

Why did the C64 use a separate “CAN” +5 V power supply for some chips?

commodore-64 power

Apr 9 '20 at 11:11 Michael Graf 6,376

1

9

votes

2

answers

2k

views

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

z80 8080 game-boy

3h ago Raffzahn 132k

9

votes

3

answers

836

views

How was text handled on the Amstrad CPC 464?

text cpc464

Feb 20 at 15:36 Caleb Fuller 484

3

9

votes

1

answer

624

views

How do I clean/refurbish an Apple IIc Keyboard?

apple-ii keyboards maintenance

Jan 13 at 19:00 Community♦ 1

1

9

votes

2

answers

831

views

What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?

apple-ii floppy-disk floppy-drive disk-image

May 1 '20 at 7:23 Community♦ 1

1

9

votes

1

answer

429

views

What is the C64 disk drive “Jiffy” protocol?

commodore-64 floppy-drive

Nov 15 '19 at 13:56 Joe 1,495

9

votes

1

answer

562

views

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

commodore-64 commodore-128 dma

Nov 13 '19 at 17:16 Brian H 47.1k

1

9

votes

2

answers

512

views

What's the best way to hook up an external power supply to the Apple IIc without a 7-pin female DIN plug?

apple-ii power

Nov 7 '19 at 9:48 cjs 17.5k

9

votes

4

answers

863

views

Which cartridges were typically used together on Commodore 64 systems?

commodore-64 game-cartridge

Oct 29 '19 at 16:04 Brian H 47.1k

1

9

votes

1

answer

2k

views

What was the first LISP compiler?

history compilers lisp

Sep 21 '19 at 5:59 cjs 17.5k

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74 Questions

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

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

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

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

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

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

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

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

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

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

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

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

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

How do you send code to a Commodore disk drive and run it?

Why did some MOS 6502 packages have holes in them?

How did the Apple 1 video circuit work?

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

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

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

Did any devices use the Commodore 64 joystick ports as outputs or two-way communications ports?

Why did the C64 use a separate “CAN” +5 V power supply for some chips?

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

How was text handled on the Amstrad CPC 464?

How do I clean/refurbish an Apple IIc Keyboard?

What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?

What is the C64 disk drive “Jiffy” protocol?

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

What's the best way to hook up an external power supply to the Apple IIc without a 7-pin female DIN plug?

Which cartridges were typically used together on Commodore 64 systems?

What was the first LISP compiler?