27 lines
642 B
ArmAsm
27 lines
642 B
ArmAsm
|
.define Stil
|
||
|
|
|
||
|
|
! This subroutine stores indirect a block of bytes if
|
||
|
|
! the number of bytes is greater than four.
|
||
|
|
! The destination address is in registerpair AX.
|
||
|
|
! The lowbyte of the number of bytes is in Y,
|
||
|
|
! the highbyte is in zeropage location NBYTES+1.
|
||
|
|
|
||
|
|
|
||
|
|
Stil:
|
||
|
|
sta ADDR+3 ! destination address (highbyte)
|
||
|
|
stx ADDR+2 ! destination address (lowbyte)
|
||
|
|
sty NBYTES ! number of bytes (lowbyte)
|
||
|
|
clc
|
||
|
|
lda SP+2
|
||
|
|
sta ADDR ! source address (lowbyte)
|
||
|
|
adc NBYTES
|
||
|
|
sta SP+2 ! new stackpointer (lowbyte)
|
||
|
|
lda SP+1
|
||
|
|
sta ADDR+1 ! source address (highbyte)
|
||
|
|
adc NBYTES+1
|
||
|
|
sta SP+1 ! new stackpointer (highbyte)
|
||
|
|
inc NBYTES+1
|
||
|
|
jmp Blmnp ! do the move
|
||
|
|
|
||
|
|
|