Re: A92: MCU and design overhaul: Please read!!
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Re: A92: MCU and design overhaul: Please read!!
JamesL000@aol.com wrote:
> I just found out that unbeknownst to me, motorola has discontinued the
> MC68HC811A8, and the best replacement I can find is the XC68HC711P2, but
> unfortunatly it has a completely different command set.
>
> right now, due to all the different things that can and possibly will be
> implemented, I am comtemplating changing the design almost completely so that
> there are seperate parts that work together in a sort of daisy chain. All
> being controlled by a single, and if desired a second, microprocessor in a
> sort of semi-dumb interface with the calculator that could interpret the TI
> protocal making it possible to send variables by way of the var-link screen
> or a TI-basic program, making it much easier for non-fargo programmers to use
> it in their programs.
> then, depending on the current mode, determined by what module is currently
> plugged in and active, it could say, decode a text file and then send it
> through a printer interface module. Or could write the file to an eeprom or
> other style of low-voltage RAM.
>
> this completely modular approach would also make it easier for other people
> to make and sell peripheral units, and maybe even the main interface unit.
> This method would also satisfy all those people who wish to have all kinds
> of extras or just the basic memory expansion or printer port interface.
>
> I may also make it possible for people to either upload ROM updates ti the
> interface or otherwise upgrade it so that future compatibility will be
> possible.
>
> Please send any thoughts, comments, suggestions, or
> ideas to James L000@aol.com
>
> -James
How about using PICs? Their about $8 a piece. They have plenty of IO pins; I
think about 30.
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