> >I have come across a few old machies that had sockets like this, but 
>never
> >one that actually had a BASIC rom in it. I don't know what the ROM in 
>this
> >socket needs to contain in order for the BIOS to recognise it as a BASIC
> >ROM and run it if boot fails.
>
>I think the BASIC ROM has a particular entry address for iniitialisation
>and hooks to INT18H I think.

That sounds right, I had a 286 that had many rom sockets free.

tom

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