CLx / STx

Clears the Carry Flag.

Usage:

	CLC

Modifies flags:

Sets the Carry Flag to 1.

Usage:

	STC

Modifies flags:

Clears the Direction Flag causing string instructions to increment the SI and DI index registers.

Usage:

	CLD

Modifies flags:

Sets the Direction Flag to 1 causing string instructions to auto-decrement SI and DI instead of auto-increment.

Usage:

	STD

Modifies flags:

Disables the maskable hardware interrupts by clearing the Interrupt flag.

Usage:

	CLI

Modifies flags:

Sets the Interrupt Flag to 1, enabling recognition of all CPU hardware interrupts.

Usage:

	STI

Modifies flags: