ENDAT-GX201 USER’S MANUAL
UNICORN COMPUTER CORP.
23
D-SUB Type Connector for COM2 port (RS-422
Æ
4 Wire)
Pin No.
Function
Pin No.
Function
1
–TXD
6
NA
2
+RXD
7
NA
3
+TXD
8
NA
4
NA
9
–RXD
5
NA
D-SUB Type Connector for COM2 port (RS-485
Æ
2 Wire)
Pin No.
Function
Pin No.
Function
1
Data –
6
NA
2
NA
7
NA
3
Data +
8
NA
4
NA
9
NA
5
NA
ATXPWR: ATX Power connector
ATX
3.3V
11 1
3.3V
–12V
12 2
3.3V
GND
13 3
GND
PS ON
14 4
+5V
GND
15 5
GND
GND
16 6
+5V
GND
17 7
GND
–5V
18 8
POWER OK
+5V
19 9
5V SB
+5V
20 10
+12V
ENDAT-GX201 USER’S MANUAL
UNICORN COMPUTER CORP.
24
2-2. Installing Memory
The ENDAT-GX201 CPU board offers one 184pin DDR DIMM socket supporting up to
512MB of memory. The DDR memory can be DDR200, DDR266, DDR333 or DDR400.
2-3. Shared VGA Memory
The ENDAT-GX201 is using built-in graphic controller with Unified Memory Architecture
(UMA) -
up to 16MB
of system memory. The amount of video memory on motherboard
determines the number of colors and the video graphic resolution.
2-4. IRQs Mapping
The IRQ number is automatically assigned to PCI expansion cards after those used by
onboard device. To install a PCI riser card, you need to set the correct "ADSEL" and "INT"
(interrupt) assignment.
IRQ Status Assignment
0 Occupied Timer
1 Occupied Keyboard
2 Occupied Second
8259
3 Occupied COM2/COM4
shared
4 Occupied COM1/COM3
shared
5 Occupied LPT1
6 Occupied Floppy
Disk
7
Free Any
8 Occupied RTC
9
Shareable ACPI controller
10
Free Any
11
Free Any
12
Free
When PS/2 mouse absent
13 Occupied Coprocessor
14
Free
When IDE device absent
15 Occupied Reserved
