Changes

*PIA 6532 - (128 bytes RAM, I/O Ports, Timer)

*'''CPU''': MOS 6507, 8bit, 1.19MHz (cutdown 6502 with only 8K address space)

*'''RAM''': 128 bytes (additional 128 or 256 bytes in some cartridges)

*'''Sprites''': 2 sprites of 8pix width, 3 sprites of 1pix width

*'''I/O''': two 8bit I/O ports, six 1bit input ports

*'''Timer''': one 8bit timer (with prescaler; 1,8,64,1024 machine cycles)

*'''Audio''': two sound channels (with frequency, volume, noise control)

*'''Switches''': color/mono switch (PAL/NTSC only), and two difficulty switches

*'''Buttons''': select button, reset button (or switches in older consoles)