I do not want to buy a RAM expansion card, or rev. 8 motherboard. I want to use my rev. 6 1 MB chipRAM motherboard + 0,5 MB fastRAM only.
Why are you making this so hard on yourself? If you want to add more memory internally why not just buy one of
these? 4MB + IDE support for $64 USD. Or 8MB for the princely sum of $74 USD. Since it connects directly to the processor this will be real fast ram (like through the side expansion slot), not that fake "slow-fast" ram. But it's your Miggy, do what you want.
