So the Japanese market had very specific requirements, that PCs could not fulfill in the early DOS days. You couldn’t just replace the character ROM on your PC and make it display Japanese text (IBM did later develop the 5550 and the JX, a derivative of the PCjr, specifically for the Japanese market, and later, they developed the DOS/V variant, which added support for Japanese text to their PS/2 line, using standard VGA hardware, which by now had caught up in terms o ... ⌘ Read more
So the Japanese market had very specific requirements, that PCs could not fulfill in the early DOS days. You couldn’t just replace the character ROM on your PC and make it display Japanese text (IBM did later develop the 5550 and the JX, a derivative of the PCjr, specifically for the Japanese market, and later, they developed the DOS/V variant, which added support for Japanese text to their PS/2 line, using standard VGA hardware, which by now had caught up in terms o ... ⌘ Read more