Marshall Haze 40 four button footswitch?

[glebert]

I picked up a Marshall Haze 40 combo. Right now I'm using a two button from a Crate amp that works OK to control the channels and effects. This was blind luck. The Marshall four button footswitches are pretty unavailable. The amp uses a PIC chip to control the switching. Anyone looked into this to find out how they mapped 4 buttons onto a TRS cable? My thought was to put a potentiometer onto the tip and ring (separately) and see if there is a mapping between current draw and the different switch modes

https://www.thetubestore.com/lib/the...-Schematic.pdf

[Delta362]

I wasn't able to find any decent info for the pedal innards, but did find a used one fairly inexpensive. I've never ordered from that site, so keep that in mind.

https://themusicfarm.com/products/i-...c28ac180&_ss=r