Don Hyde wrote:
............
>The paging and banking are without a doubt the ugliest, nastiest,
>bug-waiting-to-happen-est flaws of the PIC architecture.  A whole lot of my
>programming time is devoted to finding and fixing or trying to avoid those
>bugs.
>

Ditto, ditto. [this and possibly trying to figure out where regW is
stored after an interrupt call].
=================

..........
>Somehow the Atmel guys seem to have found the extra silicon to add the
>adders in the addressing paths, so why can't the Microchip guys do it?  If
>you look at the pretty posters of chips, the part labeled "CPU" amounts to
>about 10% or so of the chip, what with all the nice peripherals and memory.
>So 10% more stuff in the CPU would be about 1% more stuff on the chip.
........

If you ever go to the Scenix - Mchp do-alikes - you'll find they have
their own set of anachronisms, but they did figure out how to handle
the page switching with relative grace. Coming back to Mchp from Scenix
usually requires a strong jolt of java.

- danM

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu