3 i/o port address map – Acrosser AR-B9612 User Manual
Page 8
 
AR-B9612 User’s Guide 
2-3 
2.3 I/O PORT ADDRESS MAP
Hex Range
Device
000-01F DMA controller 1 
020-021 Interrupt controller 1 
022-023 ALI M6117 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 
218-21A EMS register 1 
278-27F Parallel printer port 3 (LPT 3) 
2E8-2EF Serial port 4 (COM 4)
2F8-2FF Serial port 2 (COM 2)
300-31F Prototype card/Streaming Type Adapter 
378-37F Parallel printer port 2 (LPT 2) 
380-38F SDLC, bisynchronous 
3A0-3AF Bisynchronous 
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