13.20 Hardware ●●● ●●●● ●●●●● ●●● Device O Port Locations on PCs (partial).o0 ●●●● O address range(hexadecimal) device 000-00F DMA controller 020-021 interrupt controller 040-043 timer 200-20F game controller 2F8-2FF serial port (secondary) 320-32F hard-disk controller 378-37F parallel port 3D0-3DF graphics controller 3F0-3F7 diskette-drive controller 3F8-3FF serial port(primary)12 13.2 I/O Hardware Device I/O Port Locations on PCs (partial)