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From: Paul Burke
Subject: Re: ? Binary to BCD conversion chip ?
Date: Thu, 28 Nov 2002 08:49:57 +0000
Organization: Scazon Systems
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Spehro Pefhany wrote:
> >Does anyone know if there's any IC chip commercially available that can
> >convert a 4 (or 8 bit) number to BCD? Where can I buy it? I tried
> >looking up on the Net but only found 74185, which seemed to be discontinued?
> One easy way would be to use one or more standard EPROMs. For example,
> a 64K x 16 EPROM costs less than $5 one-off and will give you any 16
> bit output you like, for any 16 bit input, in less than 100ns.
There is an algorithmic way to do the conversion on an incoming stream
of data. All I can remember about it was that it was in an old
programmable logic applications book (over 15 years ago)- perhaps MMI? A
colleague implemented it in software on a 6809 and all I can say is it
worked, and saved a few vital bytes compared with divides or repeated
subtraction. Took an age though.
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