The first 512K of expansion RAM follow the [[Standard_Memory_Expansions#Standard_128K-512K_Expansions_.28dk.27tronics.2Fdobbertin-style.29|DK'Tronics addressing mode standard]], giving up to 576K of RAM to legacy software. More modern software that supports the [[Standard_Memory_Expansions#Extended_1M-4M_Expansions_.28RAM7.2FYarek-style.29|extended 1M-4M standard]] will be able to access all the provided RAM.
External memory expansions will be ignored once the iRAM is installed. This is particularly helpful can be useful for external feature-expansions that also provide a RAM expansion and usually cannot be used in parallel with other (external ) RAM expansions. A great use case is to put the ULIFAC in ROM board mode which replaces the full or parts of the expanded ULIFACs RAM with ROM slots - but . Now with the iRAM installed the CPC still has access to the full RAM provided by the iRAM. If needed a disable switch can optionally be connected to disable the internal iRAM from outside the CPC without removing the iRAM.
== released ==