Re: Teletype 5620 schematics
On Tue, Jun 18, 2019 at 9:43 PM Al Kossow via cctalk wrote: > came across these this eve, probably only of interest to Seth, since he > has one > http://bitsavers.org/pdf/att/5620/schematic > There's also a set here: http://www.brouhaha.com/~eric/retrocomputing/att/5620/ I have not compared them.
Re: Teletype 5620 schematics
On Tue, Jun 18, 2019 at 11:18 PM Jason T via cctalk wrote: > On Wed, Jun 19, 2019 at 12:48 AM Ethan Dicks via cctalk > wrote: > > Thanks for posting this, Al. > > Seconded. I've got one with the keyboard and ladybug mouse. Worked > many years ago - and I'll never know if it has stopped working if I > don't plug it in again! > Just a general bit of advice (which applies to many other systems discussed here) for you 5620 owners -- the 5620 has a battery in it, soldered to the logic board. If you haven't already, remove it before it leaks and destroys everything. - Josh
Re: Teletype 5620 schematics
On Wed, Jun 19, 2019 at 12:48 AM Ethan Dicks via cctalk wrote: > Thanks for posting this, Al. Seconded. I've got one with the keyboard and ladybug mouse. Worked many years ago - and I'll never know if it has stopped working if I don't plug it in again!
Re: Teletype 5620 schematics
On Wed, Jun 19, 2019 at 1:00 AM Al Kossow via cctalk wrote: > came across these this eve, probably only of interest to Seth, since he has > one > http://bitsavers.org/pdf/att/5620/schematic I have one too (from a friend who used to work in the Columbus Bell Labs Operating System Group (cbosg)). I found the read-through to be quite illuminating, especially the detail on the keyboard circuit (4800 bps TTL levels off one channel of the DUART). I do have a keyboard but this info makes it simple to contemplate a keyboard adapter for those that do not. Thanks for posting this, Al. -ethan
Teletype 5620 schematics
came across these this eve, probably only of interest to Seth, since he has one http://bitsavers.org/pdf/att/5620/schematic
