I/O Register Viewer

The I/O register viewer can be used to view any of the memory mapped registers in the $04000000 bank. For more information on these registers, see the list in the SDK documents or click on the More Information button when viewing a register.

Register selector
Current value Name / description
Description and current value of individual bits.  
Switches naming schemes* Displays info from the SDK.
The I/O register viewer

* There are two naming schemes, corresponding to the names found in the Mappy VM SDK (the default) and those used in other development kits.

The value of a register can be changed by clicking on the checkboxes representing its bits. However, a grayed out check box indicates that the bit is read-only and cannot be changed.

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