DEC used Tektronix R503 scopes for a display on many of their early machines.
On Wed, Apr 3, 2024 at 11:16 AM Paul Koning via cctalk < [email protected]> wrote: > > > > On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk < > [email protected]> wrote: > > > > Vintage computer enthusiasts might want to keep track of where to find > CRT-based analog oscilloscopes, for use as output devices. > > The early MIT and Lincoln Labs computers used D/A converters to steer > and activate the beam on analog scopes to draw vector images. > > Working on Whirlwind simulation, we've been able to get this technique > to work with "real" oscilloscopes, e.g., Tek 475, but we have not yet found > a single DSO that has X/Y _and_ Z inputs (let alone the required phosphor > fade). > > So did a whole range of DEC computers, of course. And the famous CDC > mainframe console (DD60) though it did vectors only for text (graphics was > dot-mode only since it wasn't a major use case for that device). > > I once built a graphics display setup for an 11/20 lab machine (in > college) using DEC D/A modules (AA-01?) with an RC-11 disk serving as the > refresh memory, DMA direct to the D/A data register. > > paul > > > -- Michael Thompson
