[email protected] (David Boyes) writes: > 8232 (a channel attached PC/AT that came with a Ungermann/Bass 10mbit > Ethernet card that jammed easily on networks with lots of collisions) > also genned as a CTC
re: http://www.garlic.com/~lynn/2010n.html#26 z/OS, TCP/IP, and OSA one of the reasons it (and some of the others) was so slow (and used a lot of the processor) ... was that it wasn't a *real* tcp/ip device/router ... it was a lan device ... aka the mainframe tcp/ip code had to do the lan/mac header packaging of the ip-packet ... before sending it down the channel interface (aka the box just acted as physical interface between the channel and the lan ... w/o any tcp/ip code). some of the other boxes were real tcp/ip devices/routers ... aka mainframe could send ip-packet over the channel interface ... and the outboard box did the appropriate routing and added appropriate media headers (as needed). as an aside ... the original vm (and mvs with vm functional simulation) product was done in vs/pascal ... and didn't have any of the buffer overflow vulnerabilities that are frequently endemic in c-language implementations. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
