Changes
CRTC
,/* The 6845 Registers */ R12 is set to 0x30 (48) : MA13=1 MA12=1 => A15=1 A14=1 to start video at address 0xC000
|11||Cursor End Raster||xxx00000||0||Sets last raster row of character that cursor is on to invert
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|12||Display Start Address (High)||xx000000||3248
|-
|13||Display Start Address (Low)||00000000||0||Allows you to offset the start of screen memory for hardware scrolling, and if using memory from address &0000 with the firmware.