Re: [cc65] CA65 Relocatable code?

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From: MagerValp (MagerValp_at_cling.gu.se)
Date: 2003-10-31 10:40:16 

>>>>> "TE" == Todd Elliott <eyeth_at_videocam.net.au> writes:

TE> How do I add code that is destined for an another address?

"Please note that you do not need this command in most cases. Placing
code at a specific address is the job of the linker, not the
assembler, so there is usually no reason to assemble code to a
specific address."

Define a segment with a different load and run address:

	RELOC:	load = ROM, run = FLASH, type = rw, define = yes;

Place the code to be relocated in .segment "RELOC", and relocate the
code:

	.zeropage

src:	.res 2
dest:	.res 2


	.code

relocate:
	ldax __RELOC_LOAD__
	stax src

	ldax __RELOC_RUN__
	stax dest

	ldy #0
	ldx #>__RELOC_SIZE__
	beq @donehi

:	lda (src),y
	sta (dest),y
	iny
	bne :-
	inc src+1
	inc dest+1
	dex
	bne :-
@donehi:

	ldx #<__RELOC_SIZE__
	beq @donelo

:	lda (src),y
	sta (dest),y
	iny
	dex
	bne :-
@donelo:
	rts

-- 
    ___          .     .  .         .       . +  .         .      o   
  _|___|_   +   .  +     .     +         .  Per Olofsson, arkadspelare
    o-o    .      .     .   o         +          MagerValp_at_cling.gu.se
     -       +            +    .     http://www.cling.gu.se/~cl3polof/
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