You have to create a MAC code on Casio registers and then type it in. It depends on region, currency type, memory usage etc. Casio don't give these out but you can use the table in the dealer manual to get one for your machine. If you don't have the dealer programming manual, you can get it online. These guys always have the real deal in my experience https://the-checkout-tech.com/manuals/cashregisters/Casio_TK-6000_TK-6500_TK-7000_TK-7500_TK-T500_CE-6000_etc_dealer_manual.html Hope it helps.
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You have to create a MAC code on Casio registers and then type it in. It depends on region, currency type, memory usage etc. Casio don't give these out but you can use the table in the dealer manual to get one for your machine. If you don't have the dealer programming manual, you can get it online. These guys always have the real deal in my experience https://the-checkout-tech.com/manuals/cashregisters/Casio_TK-6000_TK-6500_TK-7000_TK-7500_TK-T500_CE-6000_etc_dealer_manual.html
Hope it helps.