mirror of
https://github.com/bobbimanners/emailler.git
synced 2024-07-26 06:28:58 +00:00
b2d1f1875f
git-svn-id: http://svn.code.sf.net/p/netboot65/code@2 93682198-c243-4bdb-bd91-e943c89aac3b
55 lines
653 B
ArmAsm
55 lines
653 B
ArmAsm
;originally from Per Olofsson's IP65 library - http://www.paradroid.net/ip65
|
|
|
|
; copy memory
|
|
|
|
|
|
.export copymem
|
|
.exportzp copy_src
|
|
.exportzp copy_dest
|
|
|
|
|
|
.segment "IP65ZP" : zeropage
|
|
|
|
; pointers for copying
|
|
copy_src: .res 2 ; source pointer
|
|
copy_dest: .res 2 ; destination pointer
|
|
|
|
|
|
.bss
|
|
|
|
end: .res 1
|
|
|
|
|
|
.code
|
|
|
|
; copy memory
|
|
; set copy_src and copy_dest, length in A/X
|
|
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
|