The design also included terminal emulation and XMODEM file transfer software which enabled the NC100 to communicate through dial-up analogue modems.
Thus, for example, the XMODEM-CRC extension, an early use of CRCs in software, uses an msbit-first CRC.
Chuck Forsberg collected a number of these into his YMODEM protocol, but poor implementation led to a further fracturing before they were re-unified by his later ZMODEM protocol.
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It was made obsolete by variants such as YMODEM-g or ZMODEM.
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XMODEM-1K was originally one of the many improvements to XMODEM introduced by Chuck Forsberg in his YMODEM protocol.
XMODEM |
:advent, ar, arc, at, cal, cat, chess (gnu), cmp, comm, compress, conquest, cron, dd, diff, ed, eroff, grep, head, indent, make, MicroEMACS, more, nroff, roff, sc, sed, sort, split, STEVIE, strings, sum, tail, tar, tee, ularn, uniq, vi, wanderer, wc, xmodem, ymodem, zmodem, zoo
The program featured all the standard functions of a BBS of the time including file transfers in several competing protocols (XMODEM, YMODEM, YMODEM-G, ZMODEM) provided with the program or as third party software; they connected externally to the main program itself.
SEAlink, and most other XMODEM enhancements, were quickly displaced following the introduction of ZMODEM.