The Oldschool PC Font Resource is your one-stop shop for the fonts bundled with classic PC-compatible computers of the 80s and early 90s. It even has little reviews!
AT&T PC6300
The rebadged Olivetti M24, with its enhanced CGA-compatible video, introduced 400-line text and graphics modes for increased resolution. These supported a 8×16 character set, which was similar to the IBM MDA font, but with more of a slab serif style on the uppercase letters, and more consistent metrics for the lowercase and accented Latin characters.
This is the text mode version – in the 640×400 graphics mode, the only difference is a more rounded ‘h’ (identical to the IBM MDA one). The 8×8 BIOS font, on the other hand, was exactly the same as IBM’s.