Utility routines: MVBL

       Name: MVBL                                                    [Show more]
       Type: Subroutine
   Category: Utility routines
    Summary: Move a multi-page block of memory
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * Elite loader (Part 1 of 3) calls MVBL


 Arguments:

   P(1 0)               The source address of the block to move

   ZP(1 0)              The destination address of the block to move

   X                    Number of pages of memory to move (1 page = 256 bytes)


.MVBL

 JSR MVPG               \ Call MVPG above to copy one page of memory from the
                        \ address in P(1 0) to the address in ZP(1 0)

 INC ZP+1               \ Increment the high byte of the source address to point
                        \ to the next page

 INC P+1                \ Increment the high byte of the destination address to
                        \ point to the next page

 DEX                    \ Decrement the page counter

 BNE MVBL               \ Loop back to copy the next page until we have done X
                        \ pages

 RTS                    \ Return from the subroutine