$CPU 8086          ' make compatible with XT systems
$LIB ALL OFF       ' turn off all PowerBASIC libraries
$ERROR ALL OFF     ' turn off all PowerBASIC error checking
$OPTIMIZE SIZE     ' optimize for smaller code
 $COMPILE UNIT      ' compile to a UNIT (.PBU)
'$COMPILE EXE       ' compile to a UNIT (.PBU)

DEFINT A-Z         ' Required for all numeric functions, forces PB to not
                   ' include floating point in UNIT (makes it smaller)
'/*------------------------------------------------------------------*/
DECLARE FUNCTION GETSCREEN() AS STRING
DECLARE SUB PUTSCREEN(BYVAL X AS STRING)
DECLARE SUB MDELAY(COUNT AS WORD)
DECLARE FUNCTION GETVIDEOSEGMENT() AS INTEGER
'/*------------------------------------------------------------------*/
$CODE SEG "MLIB4"
'/*------------------------------------------------------------------*/
' DSCREEN2(SCREEN$)
'     Display Screen Format 2.
'     Display Screen by moving new screen (SCREEN$) in from bottom.
'     SCREEN$ = Mem (binary) screen to display.
'     Returns old screen.
'     EXAMPLE:  OLD$ = DSCREEN2(SCREEN$)
'/*-2----------------------------------------------------------------*/
FUNCTION DSCREEN2(TEMP$) PUBLIC AS STRING
  R$ = GETSCREEN
  A$=TEMP$
  A%=3840
  Row%=CSRLIN
  Col%=POS(0)
  DEF SEG=GETVIDEOSEGMENT
  DO WHILE A%>-1
    AA$=AA$+LEFT$(A$,160)
    A$=MID$(A$,161)
    POKE$ A%,AA$
    DECR A%,160
    CALL MDELAY(30)
  LOOP
  LOCATE Row%,Col%
  FUNCTION = R$
END FUNCTION
'/*------------------------------------------------------------------*/
'   $INCLUDE "C:\CODE\MLIB\MLIB.INC"
'   TD$ = GETMEM("c:\code\mapper\APOGEE.MEM")
'   T2$ = GETMEM("c:\code\mapper\VMESAM.MEM")
'     PUTSCREEN T2$
'     Y$ = GETKEY
'     T$ = DSCREEN2(TD$)
'     Y$ = GETKEY
'/*------------------------------------------------------------------*/