# MatCat BrowserLogic

MatCat BrowserLogic https://www.logic.parts/ is a logic simulator written purely in HTML5 / Javascript using 2D Canvas.

## Status

This simulator is in extremely early stages, it is not even Alpha at this point but early development.  Outside contribution is welcome, please contact me in #LogicParts on Freenode IRC network.

## License

To be decided, but at this moment this code is open source and free to use for non-commercial uses.

## Changelog

### 0.4.2

* Added Hex keypad with 4 bit output, also has 3 function keys

### 0.4.1

* Fixed a signal propogation bug with IC's

### 0.4.0

* You can now pan the work area, hold ctrl key while mouse dragging an empty area.
* Right Click Menu
  * If an item is selected you can delete or disconnect them
* Top menu
  * New / Open / Save moved to File menu
  * You can now disable connection drawing, or put them above or below elements in View menu
  * There is now a pan to center feature in View menu
  * Create IC has been moved to Tools menu
  * Help menu -> About opens the Welcome Window
* Save dialog
* Fixed  various small bugs

### 0.3.10
* Added BCD and Decimal options to the 4 bit output display, as well as bit labels in inputs

### 0.3.9

* Added grid alignment, hold CTRL key while moving to get pixel level positioning.
* Fixed property restoration issue with labels on loading a save

### 0.3.8

* Added labels!  You can specify the text, size, and color

### 0.3.7

* Added 4 bit display!  Currently shows hex format
* Fixed a bug with flip flop save states for connections

### 0.3.6

* Fixed a bug where flip flops weren't firing output changes when only !Q changed.

### 0.3.5

* Fixed a bug where newly linked objects weren't being polled to the proper output

### 0.3.4

* Added Flip-Flops!  There are 4 to choose from, JK, SR, D, and T!

### 0.3.3

* Fixed a bug that crashed the engine when attempting to place an IC with no inputs

### 0.3.2

* Added IC Element, allows for converting a logic design to an IC for use in designs.
* Added IC Input and IC Output which allow for external connections when a design is used as an IC
* Added a New button for creating a new design

### 0.3.1
* Toolbox is now dynamically created and categorized
* The delete button is gone for now (use delete key on keyboard), it will come back when toolbar is added.

### 0.3.0
* Saving / Loading of designs
* New Element: Buffer, allows for construction of circuits that would otherwise be recursive
* Added pulse count to the delay block printout
* Fixed grid draw bug

### 0.2.12
* Fixed floating active link when deleting an element while linking
* Fixed the delay element so that it properly buffers all input pulses

### 0.2.11
* Added Delay element

### 0.2.10
* New elements will now do overlap detection on placement
* Newly placed elements will now be selected

### 0.2.9
* Active linking is now drawn with quadratic curves
* Links can now be deleted by simply trying to link the same link again
* Added pulse element
* Clock element now shows countdown in ms to next state change

### 0.2.8
* New elements now spawn in the center
* Added button element
* Changed switch graphical look

### 0.2.7
* Added welcome screen window

### 0.2.6
* Added background grid
* Logic elements now have proper logic shapes


### 0.2.5
* Fixed clock sync issue when disabled
* Added recursive detection on logic to prevent runaway oscillations
* Fixed click alignment on single input elements

### 0.2.4
* Brought connections to foreground to make them more obvious in less then ideal layouts
* Resized logic elements and positions I/O better
* Logic elements will now grow or shrink in size based on I/O
* Made selection box transparent

### 0.2.3
* Fixed bug where timer isn't removed when clock is deleted

### 0.2.2
* Fixed freaking out inputs on some input values
* Quadratic CURVES!  Links now look MUCH nicer :)

### 0.2.1
* Fixed input property constraints on elements
* Added NOT gate

### 0.2.0
* Switched to a dark theme
* Added left hand toolbar
* Linking can now be done by clicking on an output then an input
* Added new element: Clock

### 0.1.0
Initial public release.