I had, briefly, some Matrox card with 3D acceleration on a DOS PC. It drove a PGA (Professional Graphics Adapter) monitor, a standard that predated VGA and went

I had, briefly, some Matrox card with 3D acceleration on a DOS PC. It drove a PGA (Professional Graphics Adapter) monitor, a standard that predated VGA and went nowhere. The monitor was quite good but useless with anything else. For a time in the 1980s, I was writing drivers for graphics boards, and later doing 3D animation software. I tried a lot of graphics boards from now-forgotten vendors. Texas Instruments had the first PC RGB monitor and display that could display white text without color smear. The Wang Professional Image Computer was incompatible with everything else in PCs, with a different card form factor, a different monitor interface, and a different memory/device address layout that allowed 720KB of memory instead of 640KB. Plus their own version of DOS. Fujitsu lent me a prototype Fujitsu Sapphire, which never worked right. When I went to return it to their location in Sunnyvale, they'd moved out, shutting down their 3D graphics business. Dynamic Pictures had a decent 3D board, the Oxygen 202, that worked with NT 3.51. It took a while to get that working, but eventually it worked and I got 3D work done.