B&B Electronics ATRWDT Benutzerhandbuch
4
Documentation Number ATxWDT-1303
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Switch positions 1 - 7 of S1 configure the I/O address of the
WDT. Switches represent a binary 0 in the ON position, a binary 1
when OFF. Least significant bit (LSB) and most significant bit (MSB)
are labeled on the card. Table 1 shows the numerical weight and
electrical connection of each switch.
when OFF. Least significant bit (LSB) and most significant bit (MSB)
are labeled on the card. Table 1 shows the numerical weight and
electrical connection of each switch.
Table 1. Address Switches
Any I/O address may be used, but it is important that no other
device in the host computer use that address. Table 2 is a list of
frequently unused I/O addresses. In most cases, the WDT can be
set to one of these addresses.
frequently unused I/O addresses. In most cases, the WDT can be
set to one of these addresses.
Table 2. Frequently Unused Port Addresses
S1 Position
7
6
5
4
3
2
1
Bus
Connection
Connection
SA9
SA8
SA7
SA6
SA5
SA4
SA3
Decimal
Weight
Weight
512
256
128
64
32
16
8
Hex Weight
200
100
80
40
20
10
8
Base Hex
Address
Binary
Equivalent
Switch
Settings
MSB
LSB
I/O Space
Description
200
1000000000
1000000
game port
208
1000001000
1000001
game port
300
1100000000
1100000
prototype
308
1100001000
1100001
prototype
310
1100010000
1100010
prototype
318
1100011000
1100011
prototype
380
1110000000
1110000
SDLC
388
1110001000
1110001
SDLC
3A0
1110100000
1110100
bisync comm
3A8
1110101000
1110101
bisync comm