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It is possible to change the VIC20 memory configuration in two ways: by enabling and/or disabling certain individual memory blocks, or by choosing one among a few typical memory configurations. The former can be done by modifying resource values directly or from the right-button menu; the latter can only be done from the menu.
There are 5 RAM expansion blocks in the VIC20, numbered 0, 1, 2, 3 and 5:
These blocks are called expansion blocks because they are not
present a stock (“unexpanded”) machine. Each of them is associated to
a boolean RamBlockX
resource (where X
is the block number)
that specifies whether the block is enabled or not.
There are also some common memory configurations you can select: