(For details regarding the “IS-Viewer64” Development Cartridge specifically…CLICK HERE!)
One of the requirements for the IS-Viewer64 development cartridge was a modified N64 console. This entailed a series of tie-lines or “bodge wires” to re-route a CPU Interrupt and Reset signal.
This would allow the Development cartridge to communicate directly with the N64 condole CPU.
Below are a series of hi-resolution images showing the Internal PCBA of a Modified N64 console used with the IS-Viewer64 and Partner-N64 development cartridges.
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For a detailed Guide showing you how to build this Modified console yourself, see the Guide provided by the Ultra64.ca Website. Link below:
https://ultra64.ca/tutorials/make-your-own-partner-n64-console-for-use-with-is-viewer/