goto is not a good idea as somewhere in the main you could have the
pagesel set to another page than the isr.

Tam=E1s

On 4/6/10, ivp <joecolquitt@clear.net.nz> wrote:
>> First problem:  You have code at 0x04 that doesn't belong in the
>> interrupt routine; it looks more like stuff that should be at "start";
>
> Joe,
>
> Yes. At the bottom of memory are 2 vectors
>
> As absolute addresses you'd have something like
>
> org 0x00 ;reset vector
> goto start
>
> org 0x04 ;interrupt vector
> goto isr
>
> See Figure 2.1 in the datasheet
>
> Now, you can have the ISR before the main program in memory, after
> the main program or within it
>
> For example have the ISR right at the bottom of memory, as some people
> prefer. Then you'd have the main code following it, eg
>
> org 0x00
>
> isr code
>
> org 0x100
>
> main code
>
> Similarly the ISR can go after the main code, eg
>
> org 0x00
>
> main code
>
> org 0x1000
>
> isr code
>
> The ISR code can be embedded within the main code
>
> org 0x00
> goto start
>
> org 0x04
> goto isr
>
> org <program start address>
>
> and isr is a subroutine in the main code that exits with a retfie rather
> than a return
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Sent from my mobile device

int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }

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