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memory mapping - any space available?

Tom Lombardo

Hi,

I have an MCB251 board, which I'm running in 8051, non-page mode.
Is there any memory space available for mapping another device, such as
an ADC or and external 8255 I/O chip? If so, how do I access it?

I've got a connector going to the "8051 interface pins", and I can build
circuitry to demultiplex the A/D bus, but there doesn't seem to be any address
space available.

Thanks,
Tom