gnupic: support for 18Fxxx parts ?
Subject:
Re: support for 18Fxxx parts ?
From:
Scott Dattalo ####@####.####
Date:
3 Jul 2002 04:12:51 -0000
Message-Id: <Pine.LNX.4.44.0207022050470.16066-100000@ruckus.brouhaha.com>
On Tue, 2 Jul 2002, Jesse Lackey wrote:
> Hello all,
>
> Is anyone using the 18Fxxx parts under linux? I've been using gpasm and
> a tweaked programmer (picprg2.x) for 16F877 with good success. From
> looking at the gpasm documentation it doesn't appear to support the
> 16-bit program word devices.
gpasm supports the 18fxxx devices just fine.
>
> Anyone using microchip software under Wine to do this? Tips/advice?
I've heard of it being done, but I don't know the latest status (only
parts worked).
> Is it possible to use SDCC output and assemble it for 18Fxxx parts?
yes, in the same way any 14-bit targetted program works on the 16-bit
cores. SDCC will not target the 18fxxx parts natively.
> Perhaps with some (automated?) conversion process? Are the 16-bit parts
> upwardly compatible with the 14-bit at the source level?
Almost 100%, but as Matt says almost is not good enough. There are a
couple of really subtle differences - e.g. incf and decf affect the C and
DC bits in the 18fxxx parts, but not in the 14-bit cores.
Scott
