Liren Large Software Subsidy 13/13.iso/p/p082/1.img/LOGIC.DOC

Text File | 1992-04-15 | 11.8 KB | 290 lines

            PADS-LOGIC Version 2.5 ADVISORIES


PINSTALL

The PINSTALL (PADS Installation program) provided with PADS-LOGIC v2.5 can
only be used to install PADS-LOGIC v.2.5 and PADS-PCB v4.x. Do not use the
PINSTALL provided on other PADS product diskettes to install PADS-LOGIC v2.5.

You must use the PINSTALL program provided with other PADS programs (i.e.,
PADS-2000 v3.x, PADS-SuperRouter v4.x) for installing PADS programs other
than PADS-LOGIC v2.5 and PADS-PCB v4.x.

If you are loading other PADS programs, then you must load PADS-LOGIC v2.5
last. Batch files for the other programs reference the old PADS-LOGIC
executable "CAE.EXE" rather than the new ones, "LOGIC32.EXE" and
"LOGIC16.EXE". If you do not load PADS-LOGIC v2.5 last, then you must
modify the names of the executables yourself or re-load the software over
again.

You cannot load PADS-LOGIC 16-bit and 32-bit into the same directory. Before
beginning the installation process, decide which option you will be
installing. To help you select which option to install a list of
considerations is provided in the PADS-LOGIC Reference Manual.



USER LIBRARIES

In order to support all of the new Library features incorporated into the
software, you must convert any library items that you have created into the
new Library format. The procedure on how to use the Library Conversion
Program CONV3TO4 is explained below.

If you are a new user of PADS-LOGIC and/or PADS-PCB, you will not have any
customized library shapes, therefore you can disregard this note.

If you are an existing user and have PADS-PCB Version 4.x or PADS-2000
version 3.x already installed, and you are updating to PADS-LOGIC Version
2.x, pay special attention to items 8 and 9 regarding initializing existing
libraries.

Customers Converting V 1.2x PADS-LOGIC Libraries to PADS-LOGIC V 2.x format:

1)      Load the Version 2.X Update.
2)      Type:  CD  \PADS  <CR>  to change to the \PADS directory.
3)      Type:  CONV3TO4  <CR>
4)      Select Item #4.
5)      Select the version of the package that you are converting.
6)      Select the type of library that you are converting.
7)      Enter the drive letter (followed by a colon) and the path to your old
    PADS Library.  (<CR> defaults to the current drive and the \PADS\LIB
    directory.)
8)      Initialize or add to existing V4 Library? I/A.  "I" should be used if
    your User Library does not exist.  "A" should be entered if you are
    adding parts to an existing V 4.0 Library.
9)      Overwrite duplicate items? (This prompt only appears if you have
    responded with the letter "A" to the question #8, and intend on
    replacing parts already existing in the V4.0 library.  If you are
    only planning on adding parts to the new library, enter an "N" for
    "NO").
10)     Confirm the selection.

Keep in mind that one of the new features with the library is the ability
to have up to 9 different libraries active at one time, not just a standard
and a user library.

To do this with your User Library, once you have finished converting the
libraries, go to the User Library and write out the Part Type and Decal
information that you wish to make a separate library from.  Then, create
the new Library through PLIB\INITIALIZE and feed the ASCII files back into
the new Library using PLIB's READ.

Once the Library Conversion is complete, you may also want to remove
nonessential files located in the Library directory.  Files with .DAT and
.IDX extensions are among the old library data files which can be removed
once the conversion process is complete.





USING PADS-LOGIC 16-bit and 32-bit
A schematic BINARY file created in PADS-LOGIC 16-bit is upward compatible
with the 32-bit option. A schematic created with the 32-bit option must be
transferred to the 16-bit using the ASCII OUT transfer method. Keep in mind
the 32-bit database must stay within the limits of the 16-bit option to
transfer properly.


NETLIST
When a user specifies a Reports, Netlist out, using PADS-PCB, the user
should note that the PCB decal defined in this ASCII file identifies a
specific decal which appears in his/her PCB database.  This new version is
enhanced to allow all the alternates to be available in Pads-Pcb providing
the alternate decal being called out is one of the alternates presently
defined in the part type used to bring the part in.  If the decal is
completely independent of the part type being used, then only that specific
decal will be available in the board design.


REPLACE PART
Attempting to replace a part in a schematic which has less pins than the
original part results in the prompt:  "NEW PART HAS LESS PINS THAN ORIGINAL
PART", and the part will not be replaced.  This is an error checking
function that is performing correctly.  You cannot change a part with fewer
pins because connections would be lost. Always replace with a part
containing the same number or more pins.  If not possible, the original
part must be deleted and the new part (with fewer pins) put in and reconnected.


DUPLICATE PIN NAMES
Unable to have duplicate pin names in LOGIC decal!  Names such as NC or N/C
must be different, ie: NC1, NC2, etc.. This is functioning correctly and
will not be changed.  If desired, add the names as free text in the Mod Gate
routine.


REFERENCE DESIGNATORS
Pure alpha reference designator names are not supported.


BUS NAMES
Bus names with alphanumeric characters are not supported, ie: DA1[00:13],
only names such as  DA[00:13]


SET PLOGIC
If you use the directory variable statement (i.e., set PLOGIC or PPCB), the
batch files associated with PADS Software must also be modified to match
the new directories assigned.


MEMORY REQUIREMENTS
Customers using the 16-bit option of Pads-Logic must have 1 Megabyte of
expanded memory available in order to run the program.  Customers who are
using a 286 CPU MUST have the expanded memory loaded on a true expanded
memory card.  Customers with a 386 CPU can configure their expanded memory
via an expanded memory manager.

Customers using the 32-bit option of PADS-Logic do not need expanded memory
to operate the software. Since the 32-bit option is written in 32-bit code,
it will only operate on 80386 and 80486 computers.


DISK SPACE
Please be advised that on systems with low amounts of hard disk space, a
message appears indicating your disk space is low, and the backup files
cannot be created without clearing up more disk space.  If the message goes
unheeded, the system in some cases will attempt to try backing up the
schematics and get caught in a never ending loop. A reboot of the system is
the only way out of the software.


CAE DECAL GENERATION
Many users are modifying existing parttypes to make other parts.  While
this is a valid procedure, please be aware that if you make changes to a
gate decal at this level (physical changes rather than text modifications),
any other parttype that utilizes this gate decal in its configuration, will
also assume these physical changes.  The correct way to implement these
changes is:

1)      To use an existing gate decal as a base for generating another, call
    up gate "A" under the "GATE DECAL" command in the library menus,
    produce all the modifications necessary at this point, and save it
    away as gate"B".  This way gate "A" is preserved in its original form
    and gate"B" has now been created.
2)      To generate a new gate decal at the parttype stage, you simply define
    the name in the electrical section.  When you complete (F9) the
    parttype, the system alerts you that your gate decal does not
    exist.  At this time, select "MOD GATE" and generate your gate decal.
    Once you have finished defining the gate, select complete (F9), and
    save the part away in the normal fashion.


OFFPAGE
If a schematic is brought to another design station and a GROUP/CUT is
performed which contained offpage symbols, when that cut is re-added to a
new sheet, the offpage symbol may be added using the wrong symbol.  This is
caused by the differences between the offpage parts which can vary from
system to system.  We recommend modifying the offpage part on system two to
match that of system one, then paste the group back in.


REPORTS
The REPORTS/NETLIST selection called "other" should not be used by any
customer as a type of output netlist.  It is a spare entry which PADS
Software, Inc. will use when new output formats become available.
Several output formats have been removed from PADS-LOGIC Version 2.X.
These outputs have been removed to avoid confusion and will be re-instated
as they become available. They are CADnetics, ViewLOGIC, and Mentor.


DOS 5.0 ADVISORY
DOS 5.0 is functioning fine on many systems here at PADS Software, Inc.
The systems are loading all available drivers into high extended memory
which provides a large additional amount of DOS 640K memory to our
programs.  This additional DOS memory allows for larger numbers of parts,
as well as connections in our 16-bit programs. We have, however, run into
several cases where certain statements when executed through the CONFIG.SYS
file would cause the programs to lock up or act unpredictably.  We advise
stripping the CONFIG.SYS file down until you find which statements are
causing the problem.  One known statement is:

        DOS = HIGH, UMB

We also advise stripping the AUTOEXEC.BAT down until you find which
statements are causing the problem. Two known statements are:

        VERIFY ON/OFF
        MIRROR

Once these statements have been explored, investigate stripping your disk
caching programs, they may be causing problems as well.





             PADS-LOGIC 32-BIT OPTION ADVISORIES


HARDWARE NOTES
The 32-bit option of PADS-LOGIC is not compatible with 80286 or XT computers.


TRANSFERRING FILES TO PADS-LOGIC 16-BIT
A schematic created with the 32-bit option must be transferred to PADS-
LOGIC 16-bit using the ASCII OUT transfer method. Keep in mind the 32-bit
database must stay within the limits of the 16-bit option to transfer
properly.


ENGINEERING CHANGE ORDERS (ECO)
The current ECO routine supports up to 12 character net names. Problems may
occur if more than 12 character net names are used. A new ECO routine that
corrects this problem is scheduled for the next release of PADS-LOGIC.


NETWORK USERS
PADS-LOGIC 32-bit option will not run if you execute the software from a
directory other than the server's directory. Reason is, the software looks
for the PADS directory to be at the root level rather than the client path.
To run PADS-LOGIC 32-bit on a network, simply go to the server's directory,
and type:
        LOGIC32 <CR>

to invoke the executable.  NOTE: Job files are saved to the "client's" path.


FOR PADS-PCB USERS
If you plan to use the PADS-LOGIC 32-bit option with PADS-PCB, take care
not to exceed the limits of PADS-PCB. The 16-bit option of PADS-LOGIC will
not allow you to create a schematic that exceeds the maximum design size of
PADS-PCB.


NET NAMES
PADS-LOGIC 32-bit supports 47 character net names. PADS-PCB only supports
12 character net names. Problems may occur if you are using PADS-PCB and
exceed the 12 character limitation. PADS-2000 v3.x does support 47 character
net names.


BUS NAMES
PADS-LOGIC 32-bit supports BUS NAMES up to 44 characters.


SIGNAL PINS
Do not exceed more than 20 characters in the EDIT SIGPIN routine, problems
may result.


EDIT TEXT
Hierarchical symbol names cannot be turned off.


PRINTING REPORTS
To directly print out report files to your printer, type PRN <CR>.



If, after reviewing this document and consulting your PADS-LOGIC manual,
you would like additional information, then contact our Technical Support
Staff at [phone] or 1-800-423-PADS.

4/92

        *****   END OF LOGIC.DOC FILE   *****