PPM-C412/Configuration
v1.0
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Page 16
7.2 I/O Port Map
Following is a list of I/O ports for the PPM-C412.
NOTE
The PPM-C412 uses a Plug And Play (PnP) BIOS resource allocation. Take care to avoid
contention with resources allocated by the BIOS.
Table 6:
PC I/O ports
Hex Range
Usage
000-00F
8237 DMA controller #1
010-01F
Free
020-021
8259 PIC #1
022-03F
Reserved
040-043
8254 PIT
044-04D
Free
04E-04F
Reserved for on-board configuration
050-05F
Free
060-06F
8042 Keyboard/mouse controller
070-07F
CMOS RAM, clock/calendar
080-09F
DMA page registers
0A0-0BF
8259 PIC #2
0C0-0DF
8237 DMA controller #2
0E0-0EF
DOS/4G 32-bit DOS extender registers
0F0-0F1
Math co-processor control
0F2-0F7
Free
0F8-0FF
Math co-processor
100-102
Video controllers
103-11F
Free
120-12F
Digital I/O (default)
130-14F
Free
150
Reserved for on-board configuration
151-1CF
Free
1D0-1DF
Legacy watchdog (1D0-enabled; 1D8 - Pet)
1E8-1EB
Reserved for on-board configuration
1EC
Interrupt status register
1ED
Status LED
1EE-1EF
Watchdog timer control
1F0-1FF
IDE controller #1
200-277
Free
278-27F
Free (option for LPT)
280-2A7
Free