.segment "IP65ZP" : zeropage

; pointers for copying
copy_src:	.res 2			; source pointer
copy_dest:	.res 2			; destination pointer
end:		.res 1

.segment "STARTUP"    ;this is what gets put at the start of the file on the C64

	.word basicstub		; load address
.include "../inc/common.i"

basicstub:
	.word @nextline
	.word 2003
	.byte $9e
	.byte <(((init / 1000) .mod 10) + $30)
	.byte <(((init / 100 ) .mod 10) + $30)
	.byte <(((init / 10  ) .mod 10) + $30)
	.byte <(((init       ) .mod 10) + $30)
	.byte 0
@nextline:
	.word 0

init:
  ldax #cart_data
  stax copy_src
  ldax #$8000
  stax copy_dest
  ldax #$2000
  jsr copymem
  jmp ($8000) ;cold start vector
 
;copy memory
;inputs:
; copy_src is address of buffer to copy from
; copy_dest is address of buffer to copy to
; AX = number of bytes to copy
;outputs: none
copymem:
	sta end
	ldy #0

	cpx #0
	beq @tail

:	lda (copy_src),y
	sta (copy_dest),y
	iny
	bne :-
  inc copy_src+1    ;next page
  inc copy_dest+1  ;next page
	dex
	bne :-

@tail:
	lda end
	beq @done

:	lda (copy_src),y
	sta (copy_dest),y
	iny
	cpy end
	bne :-

@done:
	rts
 
;this is where the cart data will be appended to: 
 cart_data: