Other SMS300/8X300/8X305 uses?

Eric Smith spacewar at gmail.com
Tue Nov 29 15:00:58 CST 2016

On Tue, Nov 29, 2016 at 12:11 PM, Brent Hilpert <hilpert at cs.ubc.ca> wrote:

>  is the 8X300 the 'unusual', proto-DSP device discussed in a chapter of
> the Osborne book?

I don't know whether Osborne described it that way, but since the 8X300 and
8X305 don't have a multiplier, only support 8-bit addition, and can only
address 512 bytes of data address space, they wouldn't make very good DSP
processors.  However, since all instructions execute in 250 ns, they'd be
able to perform some DSP operations faster than contemporary 8-bit
microprocessors, which usually took at least 2 us for the simplest
instructions, and even longer for fancier instructions.

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