PC/104

[Lennart Sorensen]

On Wed, Jul 18, 2007 at 02:10:50PM -0400, phiscock-g851W1bGYuGnS0EtXVNi6w at public.gmane.org wrote:
> Last time I looked, 8 bit machines were outselling 16 and 32 bit machines
> by a fair margin. Even 4 bit machines are still popular.
> 
> Furthermore, it depends what you need to do. If you want to use the chip
> real estate for cache, pipelining and MMU, that will help with raw
> performance. If you want hardware timers, SCI, SPI, A/D and so on, then
> that will reduce the board parts count. (In some cases, you can get both.
> But not at rock-bottom price.)
> 
> Most of these 8 bit machines are 8/16 bit manipulators. For example, in
> the 68HC11, the basic memory width is 8 bits but there are 16 bit index
> registers.

Well the 8bit cpus were mostly 8bit data, 16 bit address, hence 64k
memory space.  So 16bit registers make good sense for things relating to
addresses.

--
Len Sorensen
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