Like most CPUs, the Z80 also needs a good clean clock signal to run. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound. Connect the positive end to the CPUs pin 11, and the negative (ground) end to pin 29. The weight of any such item can be found on its detail page. Please also note that the shipping rates for many items we sell are weight-based. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page. When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Note that there are restrictions on some products, and some products cannot be shipped to international destinations. We can ship to virtually any address in the world. The Z80 microprocessor is an 8-bit CPU with a 16-bit address bus capable of direct accessing 64k of memory space. Nearly 50 years old, the Z80 computer was designed by Federico Fagging and his team in 1974 with the first release of the device in 1976. We'll notify you via e-mail of your refund once we've received and processed the returned item. The Z80 CPU is arguably the world's most famous CPU (central processing unit) having been used in a wide range of computers from the 1970s to the 1990s. Most Z80 opcodes are one byte long, not counting a possible byte or word operand. If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days). You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). You may return most new, unopened items within 30 days of delivery for a full refund. I have for sale educational 8-bit computer kits which use the Z80 for the central processing unit (CPU).
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