Information AboutHp-il |
| CATEGORIES ABOUT HP-IL | |
| hewlett-packard products | |
| il | |
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)]] PRINCIPLES The HP-IL can be seen as a precursor to the Universal Serial Bus now largely in use on desktop computers. However, as its name implies, the cable formed a loop: the cable originated in the HP-IL extension module, ran through all connected devices, then came back to the module. On the bus, devices could act as contollers (the calculators/computers) or slaves (the peripherals). Certain controllers like the HP-71 module or the HP82973A ISA interface could be acting as slaves as well, enabling a small network of calculators to be set up. The IL used a form of Token Passing protocol for media access control. APPLICATIONS Hewlett-Packard developed a range of devices to be connected to the HP-IL, mostly peripherals such as printers and storage devices for calculators. Through the 82169A HP-IL/HPIB Interface, HP-IL controllers could be connected to instruments with an IEEE-488 (aka GPIB or IEEE-488) interface, or vice versa. There were also plans to make test equipment with IL interfaces, but apart from the somewhat popular 3468A multimeter, only a few devices were introduced before HP-IL itself became obsolete. In addition to the HP-IB interface, HP also sold RS-232 and general-purpose parallel I/O interfaces as well as a prototype kit to create custom interfaces. EQUIPMENT Controllers
Interfaces
Peripherals
Test instruments
Software
Third-party
REFERENCES
EXTERNAL LINKS
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