heffner@bsdpkh.UUCP (Paul K Heffner) (11/08/85)
Benjy Mouse writes: > > Ok, here it is: Ward Christensen wrote the XMODEM protocol with CRC > checking...(Cyclic redundancy check), so that I beleive that all of > the protocols you just mentioned are the same. > > Christiansen=XMODEM=XMODEM/CRC > > How's that? That's pretty close... Actually the baseline Christiansen protocol only checks for transmission errors with a raw checksum. (Add all the characters in the 128 byte buffer up in a 16-bit register tossing out any carries.. the result is your checksum). CRC checking was added sho