Dug these up out of storage



E64 Cartridge Emulator :  for Professional Game Developers



Z64: Independent operating without connecting to computers or any peripherals

         Capability to backup game cartridge data onto Zip 100 disks
 
         Capability to play games in the cartridge 128mbit memory & built in drive/w large lcd screen


 

I'm sorry to say but neither of those were intended for development, it's piracy equipment.

still neat

that's true

Also, it seems that you have a version 1 judging by the 128mbit memory you mention. Version 2 and 3 both had 256mbit memory and V2 is the most reliable of the two, version 3 was built with cheaper parts and had a design flaw which could result in overheating as far as I remember.