Enum ChipMode 

#[repr(u8)]
pub enum ChipMode {
    INACTIVE = 0,
    READ = 1,
    WRITE = 2,
    ADDRESS = 3,
}

The four modes of the YM2149’s bus control decoder.

Bus control decoder table, no redundancy:

Mode	BDIR	BC2	BC1
INACTIVE	0	1	0
READ	0	1	1
WRITE	1	1	0
ADDRESS	1	1	1

Variants

INACTIVE = 0

DA7~DA0 has high impedance.

READ = 1

DA7~DA0 set to output mode, and contents of register currently being addressed are output.

---

Warning!

Mode::READ makes the chip output 5V to the data bus. If you’re using this crate in an embedded project, make sure that 5V isn’t too high for your board! If it is, you can use a level shifter to prevent damage to your board.

WRITE = 2

DA7~DA0 set to input mode, and data is written to register currently being addressed.

ADDRESS = 3

DA7~DA0 set to input mode, and address is fetched from register array.

Trait Implementations

impl Debug for ChipMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.