The gameboy would copy a section of the ROM onto the screen then checksum it. The gameboy would only jump to the real start address if the displayed bitmap matched the nintendo seal of quality. This went a bit further than Sega's system by displaying it verbatim. Every ROM needed to includ the full trademark and it would be show in full to the user.
I think they get this system for the Gameboy Color. I'm not sure of the timing between the lawsuits and the GBC. In general the GBC is a GB with double clocked CPU and palleted color so they might have kept the same scheme for developer ease.
The gameboy would copy a section of the ROM onto the screen then checksum it. The gameboy would only jump to the real start address if the displayed bitmap matched the nintendo seal of quality. This went a bit further than Sega's system by displaying it verbatim. Every ROM needed to includ the full trademark and it would be show in full to the user.
I think they get this system for the Gameboy Color. I'm not sure of the timing between the lawsuits and the GBC. In general the GBC is a GB with double clocked CPU and palleted color so they might have kept the same scheme for developer ease.