 | Словари, Словарь Dictionary |
| SC/MP (Nicknamed "Scamp") A typical 8-bit from released in April 1976. It was intended for control applications (a simple in a 2.5K was added to one version). It featured 16 bit addressing, with 12 address lines and 4 lines borrowed from the data bus (it was common to borrow lines from the data bus for addressing). Internally, it included three s (P1 to P3) and two 8-bit general-purpose s. It had a , but no or instructions (though they could be emulated with index registers). During s, the was saved in P3. It was meant for embedded control, and these features were omitted for cost reasons. It was also internally to keep it cheap. The unique feature was the ability to completely share a system bus with other processors. Most processors of the time assumed they were the only ones accessing memory or I/O devices. Multiple SC/MPs could be hooked up to the bus, as well as other intelligent devices, such as s. A control line (ENOUT (Enable Out) to ENIN) could be chained along the processors to allow cooperative processing. This was very advanced for the time, compared to other s. In addition to I/O ports like the , the SC/MP also had instructions and one pin for serial input and one for output. (1994-11-16) |
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