| 摘要 |
<p>PURPOSE:To load and unload an additional program storing unit without using a complicated keyboard for an electronic device like an electronic calculator, etc., by storing an ROM memory pack to an attachment part. CONSTITUTION:An ROM memory pack 11 is stored to an attachment part 9 of an additional program storing unit. Then a keyboard part 2 corresponding to characters 12 printed on the upper surface of the pack 11 is pushed to feed the key signals shown by the characters 12. Therefore just a single ROM memory pack suffices for the key switches on the keyboard 2 for input of key signals even in case plural packs 11 are connected with switch to each other.</p> |
