REQUIRE "DDLIB[SUB,SYS]" LOAD_MODULE;
DEFINE DDSIZX=512,DDSIZY=480;

EXTERNAL SIMPLE PROCEDURE DDOUT(INTEGER ARRAY DDBUF);
EXTERNAL INTEGER DDCHAN,OVERLAY;
EXTERNAL SIMPLE PROCEDURE DDFIX(INTEGER CHAN;INTEGER ARRAY DDBUF;INTEGER C0,L0,LL,SIZLX);
EXTERNAL PROCEDURE DDCLR;
EXTERNAL PROCEDURE DDSTR(STRING STR;INTEGER X0,Y0,PICWID,NLINES,CHAN);
EXTERNAL PROCEDURE DDSTRS(STRING ARRAY STR;INTEGER X0,Y0,PICWID,NLINES,CHAN);