4 ms·
ZModem was much better once it was available. You'd generally only use Xmodem after that point if you had no other choice, because it failed frequently over unr
by KerrAvon 4y ago
ZModem was much better once it was available. You'd generally only use Xmodem after that point if you had no other choice, because it failed frequently over unreliable connections, and all phone line connections were essentially unreliable due to line noise (and sometimes other in-band interruptions). IIRC, ZModem was both faster and resumable, so that if your connection terminated in the middle of your two megabyte transfer you didn't have to redownload the first megabyte.
- deleted 4y ago[deleted]
- bluedino 4y agoI remember all kinds of other protocols coming and going. Ymodem-g! Blazing fast. I never had issues with it but friends with worse modems/phone lines were always restarting their transfers.
- ericbarrett 4y agoIf I recall, Ymodem-G (as opposed to Ymodem) was basically an unchecksummed raw file dump with a little metadata header, so it was only usable on a connection without line noise. You could actually get undetected file corruption.
- Mountain_Skies 4y agoSome SysOps would collect and support as many protocols as they could as sort of a form of bragging rights. Even with dozens, almost everyone used zmodem, or once in a while, BiModem if they wanted to chat during a transfer.