Right. On Mobile Safari on first attempt to view the site
This whole system feels so quirky and fiddly to work with compared to modern dev kits.
It's also interesting to see how much of the developer only systems and documentation has been recreated via reverse engineering. For some consoles I've worked with professionally it's a lot more than I would have thought.
Turns out it's actually a bit more complicated. The Partner-N64 uses some little-used analog input pins (LAUDIO, RAUDIO, VIDEO_SYNC) for this. The modification also requires cutting the lines to the system's DAC chip to work.
https://ultra64.ca/tutorials/make-your-own-partner-n64-conso...
Later on we had some "debug" cartridges that sat in between the console and a flash cartridge and intercepted reads/writes to a single address and replaced the data with whatever came in over a serial port back to the PC. That was enough of a backdoor to implement very basic dynamic reloading of art assets - I wrote a Photoshop plugin that added a "send to N64" button and some game-side support code and the cycle time for artists trying to see their work on a TV went from 30 minutes to 10 seconds.