2-25
2.12.2 Input/Output Port
The RS-232-C ports are assigned to COM1 and COM2. I/O port addressing and interrupts used are
shown below.
Table 2-10 RS-232-C ports and interrupts
The relationship between the RS-232-C ports and COM number is shown below.
Table 2-11 RS-232-C ports and COM number
A COM port is used for an internal modem. When a modem is set to COM1, the RS-232-C port
automatically becomes COM2.
2.12.3 25-pin Connector
This port connects an external RS-232-C device through a 9-pin D-shell connector, but the device
may have a 25-pin RS-232-C connector to communicate with the port. In this case, an attachment to
convert the 9-pin signal assignment into 25-pin becomes necessary. The following pin configura-
tions are used to convert the 9-pin assignments to the 25-pin assignments.
Table 2-12 9-pin to 25-pin conversion
COM number
Address
Interrupt level
COM1
3F8h - 3FFh
IRQ4
COM2
2F8h - 2FFh
IRQ3
Port
COM number
RS-232C
COM1 or COM2
Modem
COM1 or COM2
9-pin D-shell
female connector
Description
25-pin D-shell
male connector
1
Data Carrier Detect
8
2
Receive Data
3
3
Transmit Data
2
4
Data Terminal Ready
20
5
Ground
7
6
Data Set Ready
6
7
Request to Send
4
8
Clear to Send
5
9
Ring Indicator
22
Содержание T-Series T2200sx
Страница 1: ...1 1 Chapter 1 Hardware Overview ...
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Страница 17: ...2 1 Chapter 2 Operational Overview ...
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Страница 42: ...2 26 2 13 Connectors Appendix B contains the pin assignments for the connectors within the T2200SX ...
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Страница 169: ...6 1 Chapter 6 Reassembly Procedures ...
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Страница 191: ...App 1 Appendices ...
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Страница 195: ...App 5 Appendix A System Board Layout A 1 System Board FSTFGx ICs Figure A 1 System board FSTFGx ICs front A D D C B ...
Страница 196: ...App 6 Figure A 2 System board FSTFGx ICs back G G G G E F J H I K ...
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Страница 199: ...App 9 A 2 System Board FSTFGx Connectors Figure A 3 System board FSTFGx connectors front M G I D B R K L L H N J O C F ...
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Страница 203: ...App 13 A 3 System Board FSTFGx OSCs Figure A 5 System board FSTFGx OSCs front F G H E ...
Страница 204: ...App 14 Figure A 6 System board FSTFGx OSCs back A B C D ...
Страница 215: ...App 25 Appendix C ASCII Character Codes Table C 1 ASCII character codes ...
Страница 222: ...App 32 E 3 German Keyboard Figure E 3 German keyboard E 4 French Keyboard Figure E 4 French keyboard ...