User guide

AR-B1790 User’s Guide
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3.9 PARALLEL & COM1 & VGA PORT (PT1)
AR-B1790 built-in a 9-pin standard COM port, a 15-pin VGA port and 1 LPT port. Device like printer can de
connected to LPT port . Mouse and modem etc can de connected to COM port. CRT monitor can be connected to
VGA port.
3.10 FLOPPY DRIVE CONNECTOR (FDD1)
The AR-B1790 provides a 34-pin header type connector for supporting up to two floppy disk drives.
To enable or disable the floppy disk controller, please use the BIOS Setup program.
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34
1
2
COM1
Pin
Signal
Pin Signal
1
/DCD1
2
RXD1
3
TXD1
4
/ DTR1
5
GND
6
/ DSR1
7
/RTS1
8
/ CTS1
9 /RI1
VGA1
PRINT
Pin Signal Pin Signal
1 -STB 2 -AFD
3 PD0 4 -ERROR
5 PD1 6 -INIT
7 PD2 8 -SLIN
9 PD3 10 GND
11 PD4 12 GND
13 PD5 14 GND
15 PD6 16 GND
17 PD7 18 GND
19 -ACK 20 GND
21 BUSY 22 GND
23 PE 24 GND
25 SLCT 26 N.C
Pin Signal Pin Signal Pin Signal
1 RED 6 GND 11 N.C
2 GREEN 7 GND 12 SDA
3 BLUE 8 GND 13 HSYNC
4 N.C 9 VCC 14 VSYNC
5 GND 10 GND 15 SCL
PIN Signal PIN Signal
1-33(odd) GROUND 18 DIRECTION
2 DRVEN 0 20 -STEP OUTPUT PULSE
4 NOT USED 22 -WRITE DATA
6 DRVEN 1 24 -WRITE GATE
8 -INDEX 26 -TRACK 0
10 -MOTOR ENABLE 0 28 -WRITE PROTECT
12 -DRIVE SELECT 1 30 -READ DATA
14 -DRIVE SELECT 0 32 -SIDE 1 SELECT
16 -MOTOR ENABLE 1 34 DISK CHANGE
1425
13 1
LPT1
PRINT (25 pin Female)
COM1 VGA VGA1
Serial port VGA port
(9 pin Male) (15 pin Female)