Recently I'm researching cread.exe (a Chinese reading software) and the "curved font library" used by Pocket Dragon. Through disassembling cread.exe, I found that it rewrites the 1Dh interrupt, making it a program to read the specified character pattern. After putting the location code in AX, it can return the starting address of the character pattern. But I didn't understand the specific program of the rewritten 1Dh. Is there any expert who knows its specific principle?
