gnupic: Re: [gnupic] differences in lcall macros
Subject:
Re: [gnupic] differences in lcall macros
From:
Craig Franklin ####@####.####
Date:
24 Aug 2006 02:26:17 +0100
Message-Id: <44ED0129.9070708@users.sourceforge.net>
The lcall macro in gpasm uses the pagesel directive to set the PCLATH
bits. Pagesel knows how many pages are on the device you are targeting,
so it doesn't waste any instructions setting an unused bit.
This might be different than MPLAB, but I think it is better.
Nestor A. Marchesini wrote:
> Hello
> I have met a difference between MPLAB 7.01 and gpasm 0.13.4, in the macro
> lcall, in this case it affected me because my code does checksum of
> all the
> memory of program, originally it had done it with MPLAB, now change lcall
> for mnemonic simple to change the bits of the register pclath of way
> of not
> altering the original checksum of my code.
>
> MPASM 03.90.01 Released
> LOC OBJET CODE LINE
> 074A 158A 120A 2000 02713 lcall CheckSumPrograma1
>
> It would be shaped for:
>
> bsf PCLATH,3
> bcf PCLATH,4
> call CheckSumProgram1
>
> gpasm-0.13.4 beta
> LOC OBJET CODE LINE
> 074A 158A 2000 02713 lcall CheckSumPrograma1
>
> It would be shaped for:
>
> bsf PCLATH,3
> call CheckSumProgram1
>
> Maybe the difference is because I am comparing with MPLAB version 7.01
> and
> in MPLAB's later versions this difference already does not exist.
>
> Regards
>
> Néstor A. Marchesini
> Chajari-Entre Rios-Argentina
> ICQ # 50983752 colo
> MSN ####@####.####
> ####@####.####
> ####@####.####
> http://www.deselectronica.com.ar
>
>
