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11301: Difference between revisions
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→Internals Common to the 11301 and 11302
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Like a typical analog scope, the 11300 has vertical amplifiers, a trigger circuit, | Like a typical analog scope, the 11300 has vertical amplifiers, a trigger circuit, | ||
a timebase/sweep, a horizontal amplifier, and a CRT. | a timebase/sweep, a horizontal amplifier, and a CRT. | ||
Unlike traditional analog scopes, | Unlike traditional analog scopes, | ||
including multiple microprocessors. | an 11300 system contains contains a significant amount of digital circuitry, | ||
including multiple microprocessors, one in the mainframe and at least one in each plug-in. | |||
The digital circuitry provides several externally-observable features: | The digital circuitry provides several externally-observable features: | ||
* self-test and diagnosis | * self-test and diagnosis | ||
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The output of the main ABUS multiplexer is fed to an LF398 sample and hold IC, | The output of the main ABUS multiplexer is fed to an LF398 sample and hold IC, | ||
the output of which is fed to an AD574 12-bit successive approximation analog to digital converter. | the output of which is fed to an AD574 12-bit successive approximation analog to digital converter. | ||
The 11300 has a GPIB interface implemented using a TMS9914A GPIB controller IC. | |||
The 11300 uses a TMS4500A DRAM controller to manage a bank of 41464 DRAM chips. | |||
The main CPU in the 11300 mainframe is an Intel 80186. | |||
Program memory for the 80186, i.e., firmware, is stored on eight 27512 EPROMs. | |||
Four of the EPROMs contain the lower bytes and the other four EPROMs contain the upper bytes. | |||
This is shown on schematic figure 9, Kernel. | |||
==Pictures== | ==Pictures== | ||