Category:Mappers using $4020-$5FFF
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These circuit boards and ASIC mappers map something other than open bus to $4020-$5FFF on the CPU bus. Many of them would interfere with the Vs. System's coin counter output.
Pages in category "Mappers using $4020-$5FFF"
The following 33 pages are in this category, out of 33 total.