23 Jan
2003
23 Jan
'03
2:42 p.m.
On Thursday, January 23, 2003, Tony Duell wrote:
The original 8051 really suffers from only having one
16 bit DPTR (data
address register). This has been corrected on some of the improved
versions now available, but code written for those is no longer portable
to all 8051 derivatives.
I wrote a bit of firmware for the Dallas DS80C520, one of the improved
versions. It was great fun. There is a *lot* of functionality packed into
that chip.
--
Jeffrey Sharp