In the SDL version.

Created infrastructure that allows the usage of the serial device to capture the result of the tests.
Then the test is executed agains a pre-defined number of cycles and the result is compared against expectation.

This makes it possible to select CBG or DMG mode taking into consideration the CGB flag in the ROM file.

With initial approach for scalling down the speed of other components.

Created more panic conditions for the KEY0 and KEY1.

The background attributes seem to be failing.