DIDN't the datapoint 3300 have that? On Sun, Dec 13, 2020 at 9:49 PM Nigel Johnson via cctalk < cctalk@classiccmp.org> wrote:
> I'm pretty sure the DEC VT100 didn't have it. It was very memory > -limited - the standard was 80x 24 and if you wanted 132 x 24 you had to > buy the advanced video option. > > There was a demo program that made it look like it recovered data that > had been scrolled off the top of the screen, but I think it was just > re-sent form the computer. > > cheers, > > Nigel > > > > Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU > Amateur Radio, the origin of the open-source concept! > Skype: TILBURY2591 nw.john...@ieee.org > > > > On 2020-12-13 9:37 p.m., Stan Sieler via cctalk wrote: > > Hi, > > > > First, apologies if I asked this years ago (I've searched my archives, no > > hits :) > > > > When was the concept of memory "above" the screen invented for terminals? > > > > I.e., previously displayed data that had scrolled up and off the screen > ... > > but could be retrieved (usually by scrolling down). > > > > (Sometimes called "scrollback", or "offscreen memory".) > > > > (BTW, I'm talking about terminal-local memory, not a scrollback > implemented > > by the computer to which the terminal is connected.) > > > > The HP 2640A, 1974, had (IIRC) several pages of memory available ... the > > user could scroll > > backwards and see what had been on the screen before it scrolled off (as > > long > > as it hadn't been lost by having too much subsequent output). > > > > I suspect the DEV VT100, 1978, had it, but I can't find definitive proof > > online (sure, I can find VT102 emulators that have scrollback, but > reading > > an old VT102 manual doesn't make it clear that it has it.) > > > > thanks, > > > > Stan >