pub const VIA6522_ORB: u8 = 0b0000;
pub const VIA6522_ORA: u8 = 0b0001;
pub const VIA6522_DDRB: u8 = 0b0010;
pub const VIA6522_DDRA: u8 = 0b0011;

/// Timer 1 Write Latch
pub const VIA6522_T1WL: u8 = 0b0100;
/// Timer 1 Read Counter High
pub const VIA6522_T1CL: u8 = 0b0101;
pub const VIA6522_T1CH: u8 = 0b0110;
pub const VIA6522_T1LL: u8 = 0b0111;
pub const VIA6522_T1LH: u8 = 0b1000;
pub const VIA6522_T2LL: u8 = 0b1001;
pub const VIA6522_T2CH: u8 = 0b1010;
pub const VIA6522_SR:  u8 =  0b1011;
pub const VIA6522_ACR: u8 =  0b1100;
pub const VIA6522_PCR: u8 =  0b1101;
pub const VIA6522_IFR: u8 =  0b1110;
pub const VIA6522_IER: u8 =  0b1111;
