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Timers, interrupts & DMA
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8253
8259
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6840
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I/O & support
› Timers, interrupts & DMA
Timers, interrupts & DMA
5 chips
Chips
Intel 8253 PIT
Intel 8259 PIC
Intel 8237 DMA
Zilog Z80 CTC
Motorola 6840 PTM