Difference between revisions of "Datagear DMA Port"

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(core 3.1.3 changes/refresh)
(core 3.1.3 changes/refresh)
Line 1: Line 1:
 
{{Port
 
{{Port
 
|Number=$xx6B
 
|Number=$xx6B
|ShortDesc=Controls Z8410 DMA chip via Datagear standard.
+
|ShortDesc=Controls zxnDMA chip
 
|Readable=Yes
 
|Readable=Yes
 
|Writable=Yes
 
|Writable=Yes

Revision as of 18:40, 13 April 2020

Number $xx6B
Decimal
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.