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- Help for Xmodem
-
- Xmodem is often called the "lowest common denominator" protocol, and
- is the father protocol of many others. Xmodem sends files in blocks
- of 128 characters at a time. When the receiving computer is
- satisfied that the block has arrived intact, it signals so and waits
- for the next block. Error checking is a checksum or a more
- sophisticated Cyclic Redundancy Check. Telix supports both and will
- automatically use the right one. During a download, Telix will
- attempt to use the CRC, but will switch to checksum if it seems the
- host does not support CRC. The Xmodem protocol also needs a setup of
- no parity, 8 data bits, and 1 stop bit. If your communications
- parameters are different from these when you start an Xmodem
- transfer, Telix will switch to the required setup for the transfer,
- and back to the original setup after it is finished.
-
- Because of the need to wait for acknowledgement after each block,
- Xmodem is capable of approximately half the maximum theoretical
- transfer rate.
-