] > runs a program from internal RAM, it runs approximately 6 times as fast as
] > the Z80. However, it the R800 runs the same program from external RAM, it is
] > only approximately 2 times as fast as the Z80.
]
] So a 1MB or 4MB external memory mapper, will not be very useful for a turboR with
] GEM?
Depends on how GEM has been written. If for example the code remains in the
internal RAM while the data remains in the external RAM, you loose less
performance. Most memory accesses are for fetching instructions, so the
instruction fetch would still be fast. In such case, you would only get
slow-downs for the data fetch.
But since I do not know how GEM has been written, I can not answer this
question for you.
Kind regards,
Alex Wulms
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