Specifications

178 Chapter 9—Menu Reference
 Design—This choice creates a new, empty circuit window. This can be
used to create an entirely new design, to create a subcircuit that will
later be associated with a device, or as a temporary area to edit a circuit
scrap. There is no fixed limit on the number of designs that can be open
at once, although the complete contents of all open designs must fit
into available memory. New Design does not create a disk file and has
no effect on any files on your disk.
 Text Document—This creates a simple text document that can be used
to view or edit text used by the timing, export, and PROM/PLA
facilities in LogicWorks.
 Device Symbol—This creates a new device symbol document that can
be used to draw a new symbol for your symbol library. Symbol editing
commands are not covered in this chapter. See “Device Symbol
Editing” on page 135.
Open
This command allows a design or text document to be opened from a disk
file.
NOTE: Device symbols are not stored in separate files and so cannot be opened
using this command. For information on opening a device symbol for
editing, see “Editing an Existing Part in a Library” on page 147.
When you open a design file, the circuit data is read into memory in its
entirety and no further access to the disk file is required. LogicWorks will
let you open multiple copies of the same file and will make no attempt to
restrict you from writing any of them back to the same file. If you do this, it
is up to you to keep track of which windows have been updated and which
file you want to save each one into.
Compatibility with Older Versions
LogicWorks 5 will directly read files created by older versions. However,
once they have been modified and saved using this version, they can no
longer be used with the older version that created them.
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