please dont rip this site



Offset            Contents
0                    SOH = Ascii 01
1                    Block #, start with 1, wrap to 0 after FF
2                    Ones complement (XOR with 0xFF) of block #
3-130            128 bytes of data
131                 CRC Checksum of bytes  (carry ignored)
+ Also:

Remember also that the 'window size' is 1. An ASCII ACK must be sent to the sender before the next packet will be sent. If the checksum doesnt match, a NAK must be sent. After 10 NAKs, the transfer should abort. +


See also:

file: /Techref/xmodem.htm, 1KB, , updated: 2002/11/29 12:47, local time: 2023/6/4 07:28, owner: JMN-EFP-786,

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