Bought a Dreamcast shortly after launch, had a wonderful time with it while it lasted. Innovative games like Seaman, Samba, Chu Chu and PSO. Amazing stuff at the time. The poor little console was being pushed to its limits by a lot of games though. When Xbox and PS2 came out, it was time to move on.
Around 1990 my parents would take us to the mall and say “meet back here in 1 hour.” I would immediately go to the store that had a Gameboy display and play Tetris for the entire hour, often losing track of time and getting in trouble.
Dosbox is for dos games ;) If they ran on Win98 then try them on Win98 again. Get something like Virtualbox and make yourself a Win98 machine to play with.