The Sharp X68000 version of Super Mario Bros. is a way-to-play the NES game of the same name, released in Japan from unknown sources (maybe could be from a BBS). Rather than a port or a conversion, it is a unauthorized emulation, despite this version is just 100% identical to the NES version however.
Overview
This still same as the NES version, however, some graphical glitches occur, such as the score, world indicator and time remaining being not scrolled and the Koopa Troopa cannot kill enemies, bypassing with them and staying alive. The sound emulation is not 100% accurate, as this can be heard from the Noise channel. These could be a behavior of the NES emulator for X68000, or either from a X68000 emulator.
Trivia
- Aside from the emulator and the autorun files, the disk of the game has the original NES ROM included, but it are not in iNES File Format: They have both CHR and PRG ROMs separated, and a extra DAT file, with unknown use.
- A lot of earlier NES / Famicom games, such as Wrecking Crew, Balloon Fight and Bomberman also received the same treatment, by using a simple, but satisfactory in terms of accuracy, NES emulator to run small NES games. ome of them has people credited somewhere on the disk files however.