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A PC speaker is a loudspeaker built into some IBM PC compatible computers. The first IBM Personal Computer , model 5150 , employed a standard 2.25 inch magnetic driven (dynamic) speaker. [ 1 ] More recent computers use a tiny moving-iron or piezo speaker instead. [ 2 ]
Apple proprietary. Combines Analog VGA out, stereo analog audio out, analog microphone in, S-video capture in, Apple desktop bus interface. Proprietary connector used on Apple Macintosh Centris computers, and the Apple AudioVision 14 Display. An attempt by Apple to deal with cable clutter, by combining five separate cables from computer to monitor.
The board has a pass-through RGB cable and floppy drive cable, and requires an open 10-inch 8-bit ISA slot, and uses a boot disk to boot into Apple mode. The boot disk has both DOS and Apple software and is copy-protected. Compatibility is fairly good and allows Tandy 1000 owners to run most Apple II software on their Tandy 1000 machine for ...
The electric signaling levels are handled by a driver circuit external to the UART. Common signal levels are RS-232, RS-485, and raw TTL [1] for short debugging links. Early teletypewriters used current loops. It was one of the earliest computer communication devices, used to attach teletypewriters for an operator console.
Bi-wiring is a means of connecting a loudspeaker to an audio amplifier, primarily used in hi-fi systems. Normally, there is one pair of connectors on a loudspeaker and a single cable (two conductors) runs from the amplifier output to the terminals at the loudspeaker housing.
An IBM PC with a 5151 monitor. The IBM 5151 is a 12" transistor–transistor logic (TTL) monochrome monitor, shipped with the original IBM Personal Computer for use with the IBM Monochrome Display Adapter.