I'm trying to decode 2 16-bit hex numbers to BCD then display them on =
7-segment displays from a '877.

I only need 3 digits of each, so I can easily drop rest of the data =
internally, but they do need to be full range i.e. -999 to +999.  So, =
that means 3 BCD digits and a sign bit externally. (I already have a =
16-bit binary - BCD output routine)

I have only PORTB used, and the rest of the ports are free, but the =
device is in an application where it only might be possible to multiplex =
the display.  Basically, I could use the tmr0 interrupt which is running =
at 9600 interrups/second, but it couldn't opperate when one specific =
other operation (also interrupt driven) was running, but it would be =
easy to set up a flag for that.

What I'm thinking right now is setting up a few 22v10's to act as =
combination BCD to 7-segment decoders and latches, and using them to =
handle everything.

So, what I'm asking is which of those is better, given that I have =
enough 22v10's handy to do it, and the code written for them to handle =
the decoding/latching.  Or is there a better method entirely?

Regards,

--Brendan

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