Questions tagged [input-devices]

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3
votes
1answer
276 views

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

Looking at the schematic and explanation of how the C64 joystick ports work, it seems clear that the stick direction and button lines (JOYA0, through JOYA3 for port 1 and JOYB0, through JOYB3 for port ...
7
votes
2answers
161 views

What combinations of modifier keys can you detect on an Apple II?

Apple II computers other than the IIgs (which uses ADB) have a hardwired keyboard combined with the paddle/joystick ports for input. What combinations of modifier keys can you detect? I know that the ...
23
votes
3answers
3k views

How do I Interface a PS/2 Keyboard without Modern Techniques?

I'm attempting to build a Z80 homebrew computer to teach myself the basis of electronic design. I planned to start from something simple, like a ROM, some SRAM, a video chip and a Z80-PIO. I'd like to ...
49
votes
11answers
14k views

Why did trackballs disappear?

For a desktop computer, a mouse is a great pointing device. For a laptop if you don't want an extra device to keep track of, you need an alternative. The options I'm aware of: NubLow-tech, cheap, ...
11
votes
7answers
721 views

What were the main uses of the large CRT and light pen on early PDP computers?

My first earliest experiences with "large" computers were an HP-2100 and a sigma-7, using a teletype and punch cards/line printer respectively. I've stumbled upon an old image of a PDP-6 and PDP-6 ...
2
votes
7answers
489 views

Name for rotary dial controllers?

Many years ago I was watching the news when I saw someone on a Sun workstation controlling the display using an external input device consisting of a series of rotary dials. Turning them rotated and ...