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45
I/O Port Map 2
$0E0 - $16F 142 Reserved
$170 - $177 8 ICH7-M Secondary Hard Disk Controller
$178 - $1EF 120 User I/O
$1F0 - $1F7 8 ICH7-M Primary Hard Disk Controller
$1F8 - $277 128 User I/O
$278 - $27F 8 I/O Chip Reserved
$280 - $2E7 104 Reserved
$2E8 - $2EE 7 UART* COM4 Serial I/O*
$2EF - $2F7 9 User I/O
$2F8 - $2FE 7 Super-I/O Chip COM2 Serial I/O
(16550 Compatible)
$2FF - $36F 113 Reserved
$370 - $377 8 Super-I/O Chip* Secondary Floppy Disk Controller*
$378 - $37F 8 Super-I/O Chip Reserved
$380 - $3E7 108 Reserved
$3E8 - $3EE 7 UART* COM3 Serial I/O*
$3F0 - $3F7 8 Super-I/O Chip* Primary Floppy Disk Controller*
$3F8 - $3FE 7 Super-I/O Chip COM1 Serial I/O
(16550 Compatible)
$3FF - $4FF 256 Reserved
$500 - CFF 2048 Reserved
* While these I/O ports are reserved for the listed functions, they are not implemented on the
V7865. They are listed here to make the user aware of the standard PC usage of these ports.
Table 2-2 V7865 I/O Address Map (Continued)
I/O Address
Range
Size In
Bytes
HW Device PC/AT Function