Hello Harold et all,

> As I recall, the application is in C, so you could always use a
> switch-case statement and let the compiler deal with it!

    yes, but the Assembly code generated by the C compiler isn't that tight.

    I managed to make my computed goto code a little more smart. It have a
limitation of 63 possible GOTOs, but executes on just 11 instruction cycles:

// COMPUTED GOTO
#asm
 rlncf state, W_     // put state*4
 addwf WREG, W_      //     in WREG
 addlw 6             // align future PUSH position
 push                // put PCL+2 on the TOS
 addwf  TOSL,F       // add WREG to TOSL
 clrf   WREG
 addwfc TOSH,F       // if carry, increments TOSH
 return              // returns directly to the "goto caseXX"

 goto  case00
 goto  case01
 goto  case02
 goto  case03
        etc...
#endasm

    Althought this code works perfectly while I'm simulating it in MPLAB,
but doesn't work on the device. This is very strange.

    I've made some tests and it seens to be a bug on the PIC18F452 part(!).
It's like the STKPTR isn't incremented when PUSH is executed.

    Someone want to try it?

    Best regards,

    Brusque

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Edson Brusque                 C.I.Tronics Lighting Designers Ltda
Research and Development               Blumenau  -  SC  -  Brazil
Say NO to HTML mail                          www.citronics.com.br
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