Super Mario Bros. (NES) does not respond to controls on FCEUX

[Zynk]

Is it just me or Super Mario Bros. 1 does not respond to controls on FCEUX (2.6.4)? 

[tygerbug]

  I had never noticed this before, but was running Lady Opera SWF Panic the other day (which is an SMB1 hack) and it did not respond to controls in FCEUX. Thought it was just a problem with the ROM but maybe not.

[Googie]

I just tried out v2.6.4 with the original SMB and it worked fine for me.

[Zynk]

I just discovered that in FCEUX > Config > Input > Famicom Expansion Port was toggled. Should be set to <none> (I don't even use that feature am perplexed as to why it's set to that)

SMB1 seems to be the only game affected by that. 

[Bavi_H]

I just discovered that in FCEUX > Config > Input > Famicom Expansion Port was toggled. Should be set to <none> (I don't even use that feature am perplexed as to why it's set to that)

I think FCEUX may automatically select a Famicom Expansion device if it detects the game needs one of the expansion devices.

Specifically, I know if you open Family Basic in FCUEX, it will automatically select the Family Basic Keyboard as being connected to the Famicom Expansion Port. Then when you open another game like Super Mario Bros., the Famicom Expansion Port will still have the Family Basic keyboard connected to it until you change it back to "none".