alex@grian.cps.altadena.ca.us (Alex Pournelle) (01/10/90)
Anyone looking to upgrade their serial comms to >19.2K on a PC had best recap the discussions in comp.sys.ibm about what serial chips work reliably at fast speeds. Your cheaper clone serial boards don't keep up. Or, use parallel... Or, use TOPS, if an option. This is a good time to mention: the LW and LW+ rotary switch (on the back of the printer) are really cheap; often, they will fail or slowly malf over several years. One of my offices has a LW that's switched between PC and Mac (read: RS-422 AppleTalk) constantly, and the switch has become erratic. Also, the motherboard has developed a fault where it will accept data but not print it (!!?), which has proven nearly impossible to isolate. Alex
woody@rpp386.cactus.org (Woodrow Baker) (01/10/90)
In article <1990Jan10.043545.19766@grian.cps.altadena.ca.us>, alex@grian.cps.altadena.ca.us (Alex Pournelle) writes: > Anyone looking to upgrade their serial comms to >19.2K on a PC > had best recap > the discussions in comp.sys.ibm about what serial chips work reliably at > fast speeds. Your cheaper clone serial boards don't keep up. > > Or, use parallel... Or, use TOPS, if an option. > > This is a good time to mention: the LW and LW+ rotary switch (on the > back of the printer) are really cheap; often, they will fail or slowly > malf over several years. One of my offices has a LW that's switched > between PC and Mac (read: RS-422 AppleTalk) constantly, and the switch > has become erratic. Also, the motherboard has developed a fault where > it will accept data but not print it (!!?), which has proven nearly > impossible to isolate. > > Alex What is the software rev of the board that is failing? It may be possible to switch it under software control. Cheers Woody