XMODEM

GPTKB entity

Statements (27)
Predicate Object
gptkbp:instanceOf File Transfer Protocol
gptkbp:acknowledgement ACK/NAK
gptkbp:block 128 bytes
gptkbp:category gptkb:network_protocol
data transmission
gptkbp:developer gptkb:Ward_Christensen
gptkbp:errorDetection checksum
CRC (in XMODEM-CRC variant)
gptkbp:extendsTo gptkb:XMODEM-1K
gptkb:XMODEM-CRC
gptkb:XMODEM-g
https://www.w3.org/2000/01/rdf-schema#label XMODEM
gptkbp:influenced gptkb:SEAlink
gptkb:YMODEM
gptkb:Kermit_protocol
gptkb:ZMODEM
gptkbp:introducedIn 1977
gptkbp:license public domain
gptkbp:operates asynchronous serial communication
gptkbp:transmission half-duplex
gptkbp:usedFor file transfer over serial lines
gptkbp:usedIn BBS systems
early microcomputers
gptkbp:uses 128-byte data blocks
checksum for error detection
gptkbp:bfsParent gptkb:ACK
gptkbp:bfsLayer 6