Taking a look at a very obscure video card for vintage PCs: the Tandy Deluxe Text Display Adapter (DTDA), which has a highresolution color RGB output, but does not support any graphics. It was a stopgap product only on the market for two years in the mid1980s, but yet had three revisions, with significant differences between them.

Time flow:
0:00 Introduction
2:13 DTDA, DGDA, and similar cards
4:01 Features & revisions
6:03 Circuit board design
7:43 Not for the Tandy 1000
8:15 A monitor that works with it
9:33 Installation
10:44 First test
12:19 DOS programs
16:26 No graphics
17:37 Text mode games
20:32 Trying it with other monitors
21:57 The B and C revisions
23:47 Color MDA
26:17 Conclusion

#SepTandy #VintageComputer #CRTgaming