The Library.

T8_BENCH_LOOP:
        ; Timed counting core is unchanged from r012 and r011.
        ; Native BRK is not asynchronous in this card-ROM running state.
        ; No OFFCHK, MENU, or keyboard decoder in the counted core.

        CAL     T8_GETTM
        LD      $10,$8
        SBC     $10,$24
        JR      NZ,T8_WINDOW_DONE
        ADBW    $16,$SY
        LDW     $20,$16
        SBCW    $20,$22
        JR      NZ,T8_BENCH_LOOP

procedure DrawCell(R,C,Color:Integer);
begin
   X := (C - 1) * SIZE ;
   Y := (R - 1) * SIZE ;
   Xp := X + 1;
   Yp := Y + 1;
   Line(X,Y  ,Xp,Y , Color);
   Line(X,Yp ,Xp,Yp, Color);
end;