On Tue, 30 Apr 2019 08:30:34 -0500, Elardus Engelbrecht wrote: > >... 3279 and similar IBM 3270 display terminals? Those heavy toys have 3 blue >switches, one for Normal/Test, one for 4 or 2 colours and lastly one which >switch from A,a to A or vice versa. > I never had one of those, but a clone. In the monocase position it would display majscule while transmitting minucule. Inexcusable! If this was modal behavior of IBM 327x terminals it was probably one cause of the enduring bigotry against mixed case among mainframers.
>From https://en.wikipedia.org/wiki/IBM_3270 I see this note: >"3270 character set" [ This set contains both lower and upper case letters ] >"On the 3275 and 3277 terminals without the a text feature, lower case >characters display as uppercase." Character generator ROMs were costly, and unavailable on interpreting keypunches. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
