Function get_attributectl_reg

src/graphics/vga/mod.rs:732–759

Get attribute control register

(idx: u8)

// Get attribute control register
fn get_attributectl_reg(idx: u8) -> u8
{
	interrupts::without_interrupts(||
	{
		// Input status register
		let mut isr: Port<u8> = Port::new(INPUT_STATUS_REG);

		// Address
		let mut address: Port<u8> = Port::new(ATTRIBUTE_ADDRESS_DATA_REG);

		// Data
		let mut data: Port<u8> = Port::new(ATTRIBUTE_DATA_READ_REG);

		// Set the palette address source bit
		let idx = idx| 0x20;

		unsafe
		{
			// Reset to address mode
			isr.read();
			let tmp = address.read();
			address.write(idx);
			let res = data.read();
			address.write(tmp);
			res
		}
	})
}


// Print formatting