MAIN    START
        LD      GR1,XMIN
LOOPX   CPL     GR1,XMAX
        JPL     FIN
        OUT     SEP,SLEN
        CALL    OUTL
        OUT     SEP,SLEN        
        LD      GR2,YMIN
LOOPY   CPL     GR2,YMAX
        JPL     XNEXT
        CALL    MULL
        PUSH    0,GR1
        LD      GR1,GR0
        CALL    OUTL
        POP     GR1
        LAD     GR2,1,GR2
        JUMP    LOOPY
XNEXT   LAD     GR1,1,GR1
        JUMP    LOOPX
FIN     RET
XMIN    DC      0        
XMAX    DC      19
YMIN    DC      0        
YMAX    DC      19
SEP     DC      '--------------------'
SLEN    DC      20
        END