POKE STRING and @string$

[LCD]

Sorry for the late reply. I was busy fixing the next bug in BorIDE that stopped me from running your code.
Anyway, I tested it using this program:

Code:

sub CopyMem(src as Uinteger,des as Uinteger,length as Uinteger,bank as ubyte)
    asm
        ld a,(ix+11)
    ld bc,32765
    out (c),a
    ld h,(ix+5)
    ld l,(ix+4)
    ld d,(ix+7)
    ld e,(ix+6)
    ld b,(ix+9)
    ld c,(ix+8)
        ldir
        ld a,(23388)
        ld bc,32765
        out (c),a
    end asm
end sub

sub fastcall cpymempaged(src as Uinteger,des as Uinteger,length as Uinteger,bank as ubyte)
  asm
    ex de, hl       ; de = src
    pop hl          ; RET address
    pop af          ; bank
    ld bc,32765
    out (c),a
    pop bc          ; length
    ex (sp), hl     ; hl = des, RET addr back in the stack
    ex de, hl       ; hl = src, de = dest
    ldir
    ld a,(23388)
    ld bc,32765
    out (c),a
  end asm
end sub

paper 7:ink 0:border 7:cls
poke 23388,16
CopyMem(0,49152,6144,17)

CopyMem(49152,16384,6144,17)
border 1
pause 0
cls
cpymempaged(49152,16884,6144,17)
pause 0

It uses my and your routine. First it copies ROM contents to Bank 1 (17), then it copies it back to screen using my routine, clears screen and copies it again to screen with your routine.
I fear, your routine does not work. But it is in fact shorter than mine.