Re: [sdcc-devel] DS390/ucsim commits

[Karl B. <ka...@tu...>]

Hi all,

I've commited a few more changes to allow
sdcc -mds390 --model-small
sdcc -mds390 --model-large

These invocations will now link to the stock
small and large librarys.  An "experimental"
message is printed.  It may generate code
with dual-dptr/scratch pad AP register use.

I've commited a ucsim -t ds390 type which
emulates the dual dptr feature of the ds390.
This does not support flat24 or any other
special features of the ds390 now, only the
dual-dptr operation.

Some things to work toward:
* simulation of ds390 flat24 mode.

* Options to turn on/off various dual-dptr
   features so code can apply to
   other processors - Anchor USB chips, ...
   (auto-toggle/AP register is unique to DS390).
   (so for example: --auto-toggle)

* Add alternative to dual-dptr, so ds390
   can output common mcs51 code.  This
   may take the form of using other registers
   to swap out DPTR(a few bytes of reg bank1, or
   flags area?)  Or maybe we can find a more
   efficient way to deal with it.

* We should add --model-large to regression suite.

cheers,


Karl.