TRANSFER PROTOCOL HELP FILE
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XM - xmodem checksum, original XMODEM, 128 byte packets
XC - xmodem CRC, original XMODEM with improved CRC error checking
XK - xmodem CRC with 1K data packets
YB - YMODEM, 1K data packets, CRC error checking, sends filename,size,date
ML - MEGALINK, 512 byte packets, CRC-32, streaming, sends filename,size,date
YG - YMODEM-G, 1k packets, NO-ERROR checking, used for MNP modems ONLY!
GB - YMODEM-G BATCH, same as YMODEM-G except, filename,size,date sent
AS - ASCII transfer, used for up/down loading messages etc.
ZM - ZMODEM, full streaming protocol, CRC-32 and fast error recovery (BEST!)
