Datagear DMA Port

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Revision as of 18:40, 13 April 2020 by Ped7g (talk | contribs) (core 3.1.3 changes/refresh)
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Number $xx6B
Short desc. Controls zxnDMA chip
Bit Mask ---- ---- 0110 1011
Readable Yes
Writable Yes
Subsystem DMA

since core 3.1.2 this port $6B is always in "zxnDMA" mode, for "Zilog DMA" use MB02 DMA Port ($xx0B / 11).

Be aware the zxnDMA is by default in the new "zxnDMA" mode, acting slightly differently than original Zilog DMA.

Use Peripheral 2 Register ($06) to enable the "Zilog DMA" mode in case your SW expects Zilog-like behaviour of DMA transfers.