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Hi All, Currently, I am work on a project were I am expected to interface the HC11 with an LCD screen, a keypad, a real time clock (RTC) and a floppy disk drive. The HC11 is supposed to display the time on the LCD (the user will have the option of setting the time if the time is not correct because of transporting the machine to a different time zone). The Keypad will be used for all the user input. The HC11 will then perform a series of tests and then save the data. So far I have the LCD and Keypad working to were when I press a key, The LCD will Display the key that I pressed. Unfortunately I'm lost when it comes to interfacing the RTC and Floppy disk drive to the system. I have the HC11 in expanded mode, and the RTC I have selected is the DS12887 which has a multiplexed Address/Data bus. I have not yet bought a floppy disk drive because I don't know what kind I should get. If anyone has ever done anything like this or has any ideas of how to go about this problem, please let me know. Also, if anyone can direct me to a good book or some useful information, I would be very grateful. Thanks Chad Dudonis

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Hi, If you like a complete solution for your project, ask me privately. Regards, D.B. >Hi All, > >Currently, I am work on a project were I am expected to interface the HC11 >with an LCD screen, a keypad, a real time clock (RTC) and a floppy disk drive. >The HC11 is supposed to display the time on the LCD (the user will have the >option of setting the time if the time is not correct because of transporting >the machine to a different time zone). The Keypad will be used for all the user >input. The HC11 will then perform a series of tests and then save the data. >So far I have the LCD and Keypad working to were when I press a key, The LCD >will Display the key that I pressed. Unfortunately I'm lost when it comes to >interfacing the RTC and Floppy disk drive to the system. I have the HC11 in >expanded mode, and the RTC I have selected is the DS12887 which has a >multiplexed Address/Data bus. I have not yet bought a floppy disk drive because I >don't know what kind I should get. > >If anyone has ever done anything like this or has any ideas of how to go >about this problem, please let me know. Also, if anyone can direct me to a good >book or some useful information, I would be very grateful. > >Thanks >Chad Dudonis >To unsubscribe from this group, send an email to:

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------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------ You can try using an I2C interface. I know that exists RTC and paralel ports (for the LCD or keypad) for the I2C bus, but I don't remember the name. The problem is that this may be hard to implement with the I2C bus. Also you can try a bus multiplexer like the: 82C55 (CMOS). This chip gives three ports from one and some control lines. It's easier, but bigger. Good luck. PS: Sorry for my bad english ------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------ wrote:Hi All, Currently, I am work on a project were I am expected to interface the HC11 with an LCD screen, a keypad, a real time clock (RTC) and a floppy disk drive. The HC11 is supposed to display the time on the LCD (the user will have the option of setting the time if the time is not correct because of transporting the machine to a different time zone). The Keypad will be used for all the user input. The HC11 will then perform a series of tests and then save the data. So far I have the LCD and Keypad working to were when I press a key, The LCD will Display the key that I pressed. Unfortunately I'm lost when it comes to interfacing the RTC and Floppy disk drive to the system. I have the HC11 in expanded mode, and the RTC I have selected is the DS12887 which has a multiplexed Address/Data bus. I have not yet bought a floppy disk drive because I don't know what kind I should get. If anyone has ever done anything like this or has any ideas of how to go about this problem, please let me know. Also, if anyone can direct me to a good book or some useful information, I would be very grateful. Thanks Chad Dudonis Yahoo! Groups SponsorADVERTISEMENT To unsubscribe from this group, send an email to: Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Yahoo! Messenger Nueva versión: Super Webcam, voz, caritas animadas, y más #161;Gratis! [Non-text portions of this message have been removed]

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