FreeDOS installation error fix

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Straight vanilla install of FreeDOS on VirtualBox predictably fails right out of the  ... box. 
As soon as it starts it goes into an endless loop:
invalid opcode at 0fae invalid opcode at 0fae invalid opcode at 0fae ... etc
Bizarrely, adding the parameter 'raw' to whatever call is being made to memdisk is at least a fix for what I was using. 
Press when you get to the main screen and then 
Change from this:
[...]/memdisk
To this:
[...]/memdisk raw
I'm not sure what governs the thing that replaces [...] above. It was different on mine than the documentation where I found this suggested as a fix. 

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