* A '''nnK expansion''' adds '''nn Kbytes''' to the internal '''64 Kbytes''' in the CPC. So the resulting total size is '''nn+64 Kbytes'''.
* That '''nn+64 Kbytes''' formula does in most (or all) cases also apply on the '''CPC 6128''':
** only 64 Kbytes of it's internal memory are used
** the 2nd half of internal memory is disabled and replaced by the expansion RAM