Changes
/* Memory Mapped I/O Ports */
A colour in the palette is coded in 2 bytes:
* For first byte, bit7bits7..4 is are blue value, bit3bits3..0 is are red value* For second byte, bit7bits7..4 is are ignored, bit3bits3..0 is are green value
Sprite magnification is coded in 1 byte:
* bit7bits7..3 is are ignored* bit3bits3..2 is are X magnification (00 = not displayed, 01 = x1, 10 = x2, 11 = x4)* bit1bits1..0 is are Y magnification (00 = not displayed, 01 = x1, 10 = x2, 11 = x4)
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