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dingusppc/zdocs/heathrow.md
dingusdev 07badbb1b3 Documentation started for hardware
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The Heathrow is an I/O subsystem and a DMA controller.

It contains a feature control register, an auxiliary control register, and some registers to save states for the DBDMA and the VIA Cuda.

It also contains the emulations for the VIA Cuda, SWIM 3 floppy drive, ESCC, and MESH components.