Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente Prochaine révisionLes deux révisions suivantes | ||
back2root:ibm-pc-ms-dos:hardware:8259 [2022/12/29 02:59] – [Hardware Interrupt Sequence of Events:] frater | back2root:ibm-pc-ms-dos:hardware:8259 [2022/12/29 13:03] – [Initialization Command Word 1 at Port 20h and A0h] frater | ||
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+ | ~~TOC 1-4 ~~ | ||
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====== 8259 - Programmable Interrupt Controller (PIC) ====== | ====== 8259 - Programmable Interrupt Controller (PIC) ====== | ||
==== Initialization Command Word 1 at Port 20h and A0h ==== | ==== Initialization Command Word 1 at Port 20h and A0h ==== | ||
- | < | + | ^ Bit ^ Initiali |
- | |7|6|5|4|3|2|1|0| ICW1 | + | | |
- | | | | | | | | `---- 1=ICW4 is needed, 0=no ICW4 needed | + | | |
- | | | | | | | `----- 1=single 8259, 0=cascading 8259' | + | | |
- | | | | | | `------ | + | | |
- | | | | | `------- 1=level triggered mode, 0=edge triggered mode | + | | |
- | | | | `-------- | + | | 5-7 | must be zero for PC systems |
- | `------------- must be zero for PC systems | + | |
- | </ | + | |
==== Initialization Command Word 2 at Port 21h and A1h ==== | ==== Initialization Command Word 2 at Port 21h and A1h ==== | ||
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^ Bits |^ Buffering Mode ^ | ^ Bits |^ Buffering Mode ^ |