User manual

Fixed I/O Address Ranges
19
Fixed I/O Address Ranges
The following table contains all of the I/O address lines of the CPU. The access
type and the bit width are specified alongside the port address and the function
performed by the command.
PORT ADDRESS FUNCTION
0000h-001Fh DMA controller
0020h-002Dh Interrupt controller
002Eh-002Fh LPC SIO
0030h-003Dh Interrupt controller
0040h-0043h Timer/Counter
004Eh-004Fh LPC SIO
0050h-0053h Timer/Counter
0060h-0066h, even LPC
0061h-0067h, odd NMI
0070h-0076h, even NMI/RTC
0071h-0077h RTC
0080h-0091h DMA controller
0092h Reset
0093h-009Fh DMA controller
00A0h-00B1h Interrupt controller
00B2h-00B3h Power Management
00B4h-00BDh Interrupt controller
00C0h-00DFh DMA controller
00F0h FERR#/IGNNE#/Interrupt controller
0170h-0177h Hard disk, primary
01F0h-01F7h Hard disk, secondary
0230h-0270h Serial interface COM4 (w/ POS board
Type2)
0270h-0277h Serial interface COM4 (w/ POS board
Type1)
0290h-029Fh
Hardware Monitor
2E0h-2E8h
Serial interface COM5 (w/ POS board)