Sony 486DX - I;O Port Address Map

AR-B1474 User¡¦s Guide
2-3
2.3.1 I/O Port Address Map
Hex Range Device
000-01F DMA controller 1
020-021 Interrupt controller 1
022-023 M1429 chipset address
040-04F Timer 1
050-05F Timer 2
060-06F 8042 keyboard/controller
070-071 Real-time clock (RTC), non-maskable interrupt (NMI)
080-09F DMA page registers
0A0-0A1 Interrupt controller 2
0C0-0DF DMA controller 2
0F0 Clear Math Co-processor
0F1 Reset Math Co-processor
0F8-0FF Math Co-processor
170-178 Fixed disk 1
1F0-1F8 Fixed disk 0
201 Game port
208-20A EMS register 0
210-213 SSD
214-215 Watchdog
218-21A EMS register 1
278-27F Parallel printer port 3 (LPT 3)
290-293 SSD
294-295 Watchdog
2E8-2EF Serial port 4 (COM 4)
2F8-2FF Serial port 2 (COM 2)
310-313 SSD
314-315 Watchdog
378-37F Parallel printer port 2 (LPT 2)
380-38F SDLC, bisynchronous 2
390-393 SSD
394-395 Watchdog
3A0-3AF Bisynchronous 1
3B0-3BF Monochrome display and printer port 1 (LPT 1)
3C0-3CF EGA/VGA adapter
3D0-3DF Color/graphics monitor adapter
3E8-3EF Serial port 3 (COM 3)
3F0-3F7 Diskette controller
3F8-3FF Serial port 1 (COM 1)
Table 2-2 I/O Port Address Map