Oh of course! Thanks. The 24-bit address space changed operating system designs to use a LONG to store physical memory addresses, which I guess confused my memory of the whole thing.
It had 'real mode' which was the ordinary 8086 addressing mode (capable of 20-bit addressing to 1MB) and 'protected mode' which we called 'imaginary mode' since nobody used it.
It had 'real mode' which was the ordinary 8086 addressing mode (capable of 20-bit addressing to 1MB) and 'protected mode' which we called 'imaginary mode' since nobody used it.