Guys, You have to realise. Ps1 & n64 are ungodly different in how they handle data.
ps1 runs everything in ram (including the program which is copied from the disc into the ps1's mainram and executed there). Everything needed by the game is loaded into ram. Since CDs were slow most games took this into account and never streamed data, it was all loaded into ram at a load screen then never loaded again (unless streaming audio which is a different story).
N64 on the other hand executes game code from rom. Every cpu instruction (32bit) is directly read from rom. The n64 executes millions of instructions a second, So decompressing instructions would freaking kill the speed. On top of it since the transfer time between rom to ram was so low, many n64 games would directly stream stuff from rom.
Making larger roms work is not as simple as most of you try to make it. It will definantly take quite a bit of time to figure something out. Yet something is posible (atleast for zelda) since nintendo was able to make a method to run zelda on the gamecube.
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