Next Previous Contents v2.12, July 2001
This document describes serial port features other than those which should be covered by Modem-HOWTO, PPP-HOWTO, Serial-Programming-HOWTO, or Text-Terminal-HOWTO. It does not cover the Universal Serial Bus (see the kernel documentation for USB). It lists info on multiport serial cards. It contains technical info about the serial port itself in more detail than found in the above HOWTOs and should be best for troubleshooting when the problem is the serial port itself. If you are dealing with a Modem, PPP (used for Internet access on a phone line), or a Text-Terminal, those HOWTOs should be consulted first.
1. Introduction
2. How the Hardware Transfers Bytes
- 2.1 Transmitting
- 2.2 Receiving
- 2.3 The Large Serial Buffers
3. Serial Port Basics
4. Is the Serial Port Obsolete?
5. Multiport Serial Boards/Cards/Adapters
6. Configuring the Serial Port
7. Serial Port Devices /dev/ttyS2, etc.
8. Interesting Programs You Should Know About
9. Speed (Flow Rate)
- 9.1 Can’t Set a High Enough Speed
- 9.2 Higher Serial Throughput
10. Locking Out Others
11. Communications Programs And Utilities
- 11.1 List of Software
- 11.2 kermit and zmodem
12. Serial Tips And Miscellany
13. Troubleshooting
14. Interrupt Problem Details
15. What Are UARTs? How Do They Affect Performance?
16. Pinout and Signals
17. Voltage Waveshapes
18. Other Serial Devices (not async EIA-232)
19. Other Sources of Information
20. Appendix: Obsolete Hardware (prior to 1990) Info
- 20.1 Replacing obsolete UARTS
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