Specifications

PC/II+p Board Technical Reference Manual 78
MT002615 ©1999-2001, Megatel Computer Corporation
8 System Resource Maps
8.1 I/O Address Map
Table 41 I/O Map
I/O ADDRESS
REGION
1
USED BY DESCRIPTION USED FOR
0000-000F
M1543C DMA controller 1 8237A-5
0010-0014
M1543C IDE Native Mode Primary Channel Reserved
0020-0021
M1543C Interrupt controller 1 8259A-MASTER
0040-0043
M1543C Timer Counter Channel 0, 1, 2, Mode 8254
0060
M1543C Keyboard controller KEYBOARD
0061
M1543C NMI Status, Speaker Control KEYBOARD
0064
M1543C Keyboard Status/Command KEYBOARD
0070
M1543C Real-Time Clock RAM Address, NMI mask DS1685
0071
M1543C Real-Time Clock RAM Data DS1685
0072
M1543C Real-Time Clock RAM Address, NMI mask DS1685
0073
M1543C Real-Time Clock RAM Data DS1685
0080-008E
M1543C DMA page registers – 74LS612 DMA
008F
M1543C Refresh Address Register – Addr 23 to 17 REFRESH
0092
M1543C Alternate gate a20, fast reset register A20 GATE
00A0-00A1
M1543C Interrupt controller 2 8259A-SLAVE
00C0-00DF
M1543C DMA controller 2 8237A-5
00F0
Clear math coprocessor busy FPU
00F1
Reset math coprocessor FPU
00F8-00FF
Math coprocessor FPU
0102
69030 VGA global enable VIDEO
0170-0177
M1543C IDE Secondary Channel IDE SECONDARY
01F0-01F7
M1543C IDE Primary Channel IDE PRIMARY
0220-0227
M1543C Alternate Serial Port
0228-022F
M1543C Alternate Serial Port
0278-027F
M1543C Parallel Port – LPT2 Reserved
02B0-02DF
Reserved Video – EGA
02F8-02FF
M1543C Serial Port – COM2 COM2
0300-030F
CS8900 Ethernet controller ETHERNET
0338-033F
M1543C Alternate Serial Port
0370-0371
M1543C PNP Configuration Port 0 PNP BIOS
0370-0377
M1543C FLOPPY #2 Disk Controller FLOPPY (ALT ADDR)
0378-037A
M1543C LPT1 (Standard mode) LPT1