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=== Register 2 - Select screen mode and RMR (Control Interrupt counter, ROM configuration mapping and Graphics mode) ===
This is a general purpose register responsible for the [[Video modes|screen mode]] and the ROM configuration.
==== Screen Graphics mode selection ====
The function of bits 1 and 0 is to define the screen mode. The settings for bits 1 and 0 and the corresponding screen mode are given in the table below.