Layer 2 Active RAM Bank Register
From SpecNext Wiki
| Number | TBRegisterNumber::$12 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Sets the "SRAM page"(?) used by Layer 2 for video memory. |
Bits 5-0 store the number of the "SRAM page" used for the standard Layer 2 screen. The default is 8.
It is not clear what an "SRAM page" actually is. It does not correspond to a "bank" in standard memory management because Layer 2 is too big to fit into a single bank (it is $BFFF big while a regular bank is $3FFF).