At this point, we could as well include PGA, 8514/A and XGA or XGA-2.
"The 8514 had used a standardised API called the "Adapter Interface" or AI.
This interface is also used by XGA, IBM Image Adapter/A, and clones of the 8514/A and XGA such as the ATI Technologies Mach 32 and IIT AGX.
The interface allows computer software to offload common 2D-drawing operations (line-draw, color-fill, and block copies via a blitter) onto the hardware.
This frees the host CPU for other tasks, and greatly improves the speed of redrawing a graphics visual (such as a pie-chart or CAD-illustration).[2][3]
Hardware-level documentation of the XGA was also made, which had not been available for the 8514/A.[3]"
https://en.wikipedia.org/wiki/Extended_Graphi … _Array#Features
To my understanding, though, 8514/A was about the only one to have mattered in practice.
It was being supported by OS/2 1.x out-of-box, for example.
There also was a Mahjongg game for DOS using it.
Edit: Borland's BGI had an 8514/A driver (IBM8514.BGI), too.
Not sure if it had any acceleration, though.
http://www.thealmightyguru.com/Wiki/index.php … phics_Interface
TIGA was really fascinating, but required a DOS driver tied to a specific graphics board.
The TIGA setting in Windows 3 Setup merely is an middle-ware thing talking to the DOS driver.
8514/A was a bit different, since it had software emulators, too.
Some driver disks of the overly popular ET4000 card comes with such an emulator, for example.
XGA and XGA-2 were never really important, outside of a corporate environment, I assume.
It had been hyped for a year or two in magazines of the early 90s, then went away.
PGA had been used in the 80s, apparently, but it had been very niche, too.
A few VGA or Super EGA cards or CAD graphics cards had incorporated the functionality of it.
Except for that 8086 code execution feature. A real IBM PGA could run 8086 code, due to its 8088 processor.
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