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The A20, or address line 20, is one of the electrical lines that make up the system bus of an x86-based computer system. The A20 line in particular is used to transmit the 21st bit on the address bus.
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Explore the main themes, entities and connections around A20 line. Start with the topic map, then use the sections below for research and deeper semantic analysis.
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a20 address line memory programs physical dos bit system first gate intel segment operating lines access offset one used space
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| HIMEM.SYS have the | instance of | HMA managers | 0.80 | text |
| A20 line | related to A20 gate | Controlling | 0.60 | section |
| A20 line | related to A20 gate | A20 | 0.60 | section |
| A20 line | related to A20 gate | IBM PC | 0.60 | section |
| A20 line | related to A20 gate | KB | 0.60 | section |
| A20 line | related to A20 gate | In | 0.60 | section |
| A20 line | related to A20 handler | The A20 | 0.60 | section |
| A20 line | related to A20 handler | IBM PC | 0.60 | section |
| A20 line | related to A20 handler | HMA | 0.60 | section |
| A20 line | related to A20 handler | Extended-memory | 0.60 | section |
| A20 line | related to A20 handler | A20 | 0.60 | section |
| A20 line | related to A20 handler | In DOS | 0.60 | section |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
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