| 摘要 |
PURPOSE:To use memory cards of different capacities in free combinations by providing a means showing the memory capacity such as a constant adding circuit, etc. to the memory card that is set into a memory and linking said means among memory cards to set an address range for each memory card. CONSTITUTION:For actuation of a memory card control circuit, 1 is supplied to a constant adder circuit 13 together with addition of 4 to deliver 5 for the 2nd memory card 11b having the memory capacity of 4MB. At the same time, 1 is supplied like the circuit 13 to the 1st decoder 30 of a card selection circuit 14 through a signal line 22 branched out of a link line 21. Then an output to the input 1, i.e., an output signal that sets the 2nd-5th output terminals at 1 with other terminals set at 0 is sent to the output terminal of the decoder 30. This means that the card 11b takes charge of the 2nd-5th address ranges, i.e., a 1- 5MB address range for memory operation. |
