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7.5.4 Changing memory configuration

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: