! do not REAL*8 CONVERT this... it is for single precision TRGRAF control...
 
      REAL XBND1,XBND2,YBND1,YBND2
      LOGICAL LOGX,LOGY
      COMMON/PLOT1MMX/ XBND1,XBND2,YBND1,YBND2,LOGX,LOGY
 
! see also PLOT1MMX -- same COMMON, different variable names!
