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- /2-Z; Z,1/2-X,1/2-Y; Y,1/2-Z,1/2-X;
- -X,1/2+Z,Y; -Y,1/2+X,Z; -Z,1/2+Y,X;
- 1/2-X,Y,1/2-Z; 1/2-Z,X,1/2-Y; 1/2-Y,Z,1/2-X;
- X,1/2-Z,Y; Y,1/2-X,Z; Z,1/2-Y,X;
- 1/2-X,1/2-Y,Z; 1/2-Z,1/2-X,Y; 1/2-Y,1/2-Z,X;
- X,Z,1/2-Y; Y,X,1/2-Z; Z,Y,1/2-X;
- 999
- 223 0 1 PM3N
- HHL 0 0 1 2
- Z,X,Y; Y,Z,X; 1/2-X,1/2-Z,1/2-Y; 1/2-Y,1/2-X,1/2-Z; 1/2-Z,1/2-Y,1/2-X;
- X,-Y,-Z; Z,-X,-Y; Y,-Z,-X;
- 1/2-X,1/2+Z,1/2+Y; 1/2-Y,1/2+X,1/2+Z; 1/2-Z,1/2+Y,1/2+X;
- -X,Y,-Z; -Z,X,-Y; -Y,Z,-X;
- 1/2+X,1/2-Z,1/2+Y; 1/2+Y,1/2-X,1/2+Z; 1/2+Z,1/2-Ynd to slow down the dot-matrix output
- slightly.
-
- If your system has the proper expanded memory and driver installed, you will
- not see any sign of EM use except as you leave ATOMS. If there is a problem
- in accessing the memory, you should get one or more error messages on start-
- up. ATOMS does not release the 128K of expanded memory until you are ready to
- exit the program, so that if there is an abnormal termination the memory
- remains allocated. Depending on how much expanded memory you have available,
- you may have to reboot to free this memory. When you exit ATOMS, the error
- code is printed out: if the error code is other than zero, the memory may not
- have been deallocated.
-
- An expanded memory driver for 80386 computers with Phoenix BIOS is included in
- a separate subdirectory, /EMM, on this disk (700K or 1.2M disk) or on disk 2
- (360K disks). To install this driver, run INSTQMM. It may or may not run
- with other hardware.
-
- This release of ATOMS uses 498,097 bytes of RAM. It allows 2400 total
- displayed atoms and 2800 total displayed bonds. The maximum number of input
- atoms (symmetrically distinct atoms) is 1200, the number of input bonds or bond
- types is 55, and the number of input polyhedron types is 12. The number of
- total polyhedra displayed depends on coordination number; you can have about
- 600 tetrahedra, or 300 octahedra, or a correspondingly smaller number of
- larger polyhedra. ATOMS allows 20 forms and 120 each of faces, edges and
- corners.
-
- The maximum number of atoms is typically reached with boundary faces at
- central distances of about 15 angstroms, depending on structure density; that
- is you can show a volume of about 30 angstroms on edge.
-
- The facility for calling for a DIRectory or issuing other DOS commands from
- within ATOMS, e.g. in [B.2], uses the PAUSE command in FORTRAN. Unfortunately
- the current implementation of this by Microsoft usually suppresses error
- messages if the DOS command fails. Two known types of failure are: (1) the
- DIR command fails if there is insufficient memory; (2) the code for the
- command requested must be on the current disk and sub-directory, or must be
- accessible through a DOS PATH command. Thus if DIR or other DOS command gives
- no output, (1) see how much memory you have available with CHKDSK, and remove
- memory-resident programs if necessary; and/or (2) use the PATH command to make
- your DOS routines accessible on your hard disk, or copy any routines needed
- (such as DIR.COM) to the sub-directory or floppy disk you are using.
-
- This version of ATOMS uses by default a form of direct or low-level serial
- output for the pen-plotter, if it is on a serial port. Previous experience
- has shown that using DOS or BIOS serial output is not completely satisfactory.
- It is possible that the low-level output may fail on some machines which are
- not completely IBM compatible. There is thus an option in the serial port
- input for graphics printer [M.2.2] and pen-plotter [M.3.2] for using direct or
- low-level output (default) or DOS output (although this is superfluous for the
- dot-matrix output, which is always direct). If you find that the direct
- output fails, the DOS output should work for you. However, this often leads
- to DOS messages such as "Write fault error...", when the plotter buffer fills
- up. Pressing "R" for retry will allow you to continue. You can eliminate
- these hitches by initializing the serial port with the MODE command,
- specifying automatic retry with the p option, e.g.:
- MODE COM1:96,n,8,1,p
- This can be done before running ATOMS (e.g. in the AUTOEXEC.BAT file), or
- through the DIR or DOS-command [B.2] option in ATOMS if you forget.
-
- The direct-output option, and the DOS-output option when automatic retry is in
- effect, do not show error messages if the plotter is not connected, is not
- turned on, or there is some other problem. In the direct-output option,
- CTRL-C will return you to ATOMS; in the DOS-output version, CTRL-C will
- return you to DOS.
-
-
-