readme.mkd 7.89 KB
Newer Older
1
# SquirrelJME
2

3
4
5
**SquirrelJME** is a Java ME 8 Virtual Machine for embedded and Internet of
Things devices. It has the ultimate goal of being 99.9% compatible with the
Java ME standard.
6

7
8
9
10
11
12
13
14
15
16
This project is purely written in Java, with a small secondary C project, and 
is very easy to port to different hardware. For running on native hardware, a
compiler handles the conversion of Java byte code to machine code (in an
intermediate format). Any system specific APIs are accessed via standardized
system calls that handle the logic the compiler cannot provide. An execution
engine which is written in C is available and it offers a lightweight method
of code execution.

Additionally, there is a port of SquirrelJME to RetroArch which enables the
ability to play older J2ME software and games designed for flip-phones.
17

18
 * Copyright (C) 2013-2019 Stephanie Gawroriski
19
   <xer@multiphasicapps.net>
20
 * "SquirrelJME" and "Lex" are trademarked by Stephanie Gawroriski 2016-2019
21
 * _Lex_ and The _SquirrelJME_ Logo were illustrated by...
22
   * Kat Adam-MacEwen
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
23
   * Kat@CMYKat Designs & Illustrations <http://www.cmykat-designs.com/>
24

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
25
Please support me on [Patreon](https://www.patreon.com/SquirrelJME)!
26

27
28
Badges:

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
29
30
 * ![Commit Activity](
https://img.shields.io/github/commit-activity/w/XerTheSquirrel/SquirrelJME.svg)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
31
32
33
 * [![Patreon](
   https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.herokuapp.com%2FSquirrelJME%2Fpledges&style=flat)](
   https://www.patreon.com/SquirrelJME)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
34
 * [![Liberapay](
35
  https://img.shields.io/liberapay/receives/xershadowtail.svg?logo=liberapay)](
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
36
   https://liberapay.com/xershadowtail)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
37
38
39
 * [![CircleCI](
   https://img.shields.io/circleci/build/github/XerTheSquirrel/SquirrelJME/trunk.svg)](
   https://circleci.com/gh/XerTheSquirrel/SquirrelJME/tree/trunk)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
40
41
 * [![Discord](https://img.shields.io/discord/278929900893634560.svg)](
   https://discord.gg/9PkMMKt)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
42
43
44
 * [![Twitter](
 https://img.shields.io/twitter/follow/MultiPhasicApps.svg?label=Follow)](
   https://twitter.com/MultiPhasicApps)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
45
   
46

47
48
Information:

49
 * [Code of Conduct](code-of-conduct.mkd)
50
51
52
 * [License](license.mkd)
   * _Source_: GNU General Public License, Version 3 or later
   * _Assets_: Creative Commons CC-BY-SA 4.0
53
   * _Fonts_ : SIL Open Font License Version 1.1
54
55
56
57
58
59
 * [Contributing to SquirrelJME](contributing.mkd)
 * _End-User Documents_
   * [Building](building.mkd)
   * [Changelog](changelog.mkd)
   * [Compatibility](compatibility.mkd)
   * [History](history.mkd)
60
   * [Release Roadmap](route.mkd)
61
   * [Usage](usage.mkd)
62
 * _Developer Resources_
63
64
   * [CircleCI Status](
     https://circleci.com/gh/XerTheSquirrel/SquirrelJME/tree/trunk)
65
   * [Developer Guide](developer-guide.mkd)
66
67
68
69
70
71
   * [Developer Notes](assets/developer-notes/index.mkd)
   * [Design Document](design.mkd)
   * [Project Scope](scope.mkd)
   * [SquirrelJME As A Runtime](asruntime.mkd)
   * [CLDC 1.8 API (docs.oracle.com)](
     https://docs.oracle.com/javame/8.0/api/cldc/api/overview-summary.html)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
72

73
74
75
76
Also check out SquirrelJME's sister project _Mu_ at:

 * <https://github.com/meepingsnesroms/Mu>

77
78
## Repository

79
80
 * [Online repository](http://squirreljme.cc/)
   ([HTTPS](https://squirreljme.cc/),
81
82
   [Tor (A)](http://squirrelzarhffxz.onion/),
   [Tor (B)](http://squirrelmfbf2udn.onion/))
83
 * SquirrelJME uses `fossil` <http://fossil-scm.org/>.
84
85
 * The repository may be cloned using Fossil:
   * One of these commands:
86
87
     * `fossil clone -u http://squirreljme.cc/ squirreljme.fossil`
     * `fossil clone -u https://squirreljme.cc/ squirreljme.fossil`
88
     * `fossil clone -u http://squirrelzarhffxz.onion/ squirreljme.fossil`
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
89
     * `fossil clone -u http://squirrelmfbf2udn.onion/ squirreljme.fossil`
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
90
   * `mkdir squirreljme`
91
92
   * `cd squirreljme`
   * `fossil open ../squirreljme.fossil`
93
94
95
 * Alternatively via [GitHub](https://github.com/XerTheSquirrel/SquirrelJME):
   * `git clone https://github.com/XerTheSquirrel/SquirrelJME`
   * `cd SquirrelJME`
96
 * Trunk Source Snapshot (Main website or `fossil serve` only):
97
98
   * [TAR.GZ](/tarball/squirreljme-trunk.tar.gz?uuid=trunk)
   * [ZIP](/zip/squirreljme-trunk.zip?uuid=trunk)
99

100
## Links
101

102
 * [My Portfolio](https://shadowtail.dev/)
103
 * [My Public PGP Key](public-key.gpg.mkd)
104
 * [SquirrelJME Twitter](https://twitter.com/MultiPhasicApps)
105
 * Locations where you can get support:
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
106
   * [Discord](https://discord.gg/9PkMMKt)
107
 * Front facing social media:
108
109
   * [YouTube](
     https://www.youtube.com/playlist?list=PLpBpyrtWn1U3motx3AUOm70qG5zraCepD)
110
 * Personal Accounts (If you wish to contact me this way)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
111
   * [GitHub](https://github.com/XerTheSquirrel/)
112
   * [Keybase](https://keybase.io/xerthesquirrel)
113
   * [LinkedIn](https://www.linkedin.com/in/xerthesquirrel/)
114
   * [Mastodon (awoo.space)](https://awoo.space/@XerTheSquirrel)
115
   * [Twitter](https://twitter.com/XerShadowTail)
116
   * E-Mail: <xer@multiphasicapps.net>
117

118
119
120
## Goals

 * _To be self-hosting_ - it can build itself while running on itself, provided
Stephanie Gawroriski's avatar
Fixups.    
Stephanie Gawroriski committed
121
   there is a filesystem and enough memory.
122
123
124
125
126
127
 * _To be small_ - Smaller programs are easier to maintain and are usually
   simpler.
 * _To be fast_ - With the potential of AOT/JIT, systems that do not normally
   have a port of an existing virtual machine will usually only have an
   interpreter.
 * _To be compatible_ - So that existing Java ME 8 applications can run on this
128
129
130
   virtual machine, along with J2ME applications when required. This has the
   added bonus of allowing one to use older software to catalog for
   preservation.
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
131
132
133
134
135
136
137
 * _To compile once and run anywhere_ - Current and up to date Java
   implementations are limited only to a few select systems (_Solaris_,
   _Linux_, _BSD_, _Mac OS X_, and _Windows_). Java ME 8 as of this writing
   only supports the *FRDM-K64F* and the *Raspberry Pi*. There are multitudes
   of devices that support **J2ME**, however that is horribly out of date when
   compared with the Java that is used today (**J2ME** is equal to Java 1.4
   which was released in _2002_).
138
139
140

## Donations

141
142
143
You may donate to SquirrelJME to which would be used by the author to keep the
web server online, the purchasing of new hardware/software, and for the
purchasing of food items for consumption.
144

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
145
 * [Ko-Fi](http://ko-fi.com/xerthesquirrel)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
146
 * [Patreon](https://www.patreon.com/SquirrelJME)
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
147
 * [Liberapay](https://liberapay.com/xershadowtail)
148
149
150
151
152
153
154
155
156
157
 * BitCoin (**BTC/XBT**):
   `3NEF6Pyt2JfWnb6hn7WFcwH5jpkHYPkTNj`
 * BitCoin Cash (**BCH**):
   `qrgww4z9aalgxyyddh5ax8jyy34c89phxuklp3hcwd`
 * Ethereum (**ETH**):
   `0x7C2316f5336C63855C199784a6e145921145B74a`
 * Ethereum Classic (**ETC**):
   `0x1b30e6411bd7da6dd72cA35dabD5b98BA25A0Ae7`
 * LiteCoin (**LTC**):
   `MAogNXdjPQ7ZABtpeXztCHf4UXvfiwTuGX`
158
159
 * Stellar Lumens (**XLM**):
   `GB4O2MAMTINKS6GM6RH34KO32TJMF4QZKZTFJBE4HIPFMKRBXFQ7IAF6`.
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
160
161
162
 * XRP (**XRP**):
   * Tag: `2912047087`
   * Address: `rw2ciyaNshpHe7bCHo4bRWq6pqqynnWKQg`
163
164
 * ZCash (**ZEC**):
   `t1cBD4dJYNWs5TQk1JKFNy1Qkg3TBx8noXQ`
165

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
166
## Important Statements
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
167

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
168
169
170
***JAVA AND ALL OTHER RELATED TRADEMARKS AND COPYRIGHTS ARE OWNED BY ORACLE
CORPORATION <http://www.oracle.com/>.***

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
171
***SQUIRRELJME IS NEITHER PRODUCED BY NOR ENDORSED BY ORACLE CORPORATION.***
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
172

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
173
174
175
176
***ALL SOURCE CODE IS WRITTEN BY MYSELF WITH FUNCTIONALITY DETERMINED BY THE
DOCUMENTED APIS AND RUN-TIME BEHAVIOR. I HAVE NOT LOOKED AT THE SOURCE CODE FOR
OTHER IMPLEMENTATIONS, NEITHER FREE SOFTWARE NOR PROPRIETARY IMPLEMENTATIONS.
ESSENTIALLY SQUIRRELJME IS A CLEAN-ROOM IMPLEMENTATION OF THE DESIGN OF JAVA
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
177
ME 8. THE IMPLEMENTATIONS OF THE JAVA ME 8
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
178
179
180
APIS AND ASSOCIATED JSRS/JEPS IS CONSIDERED BY MYSELF TO BE IN THE FAIR USE
(AND IT ALSO HELPS THE JAVA ECOSYSTEM BY PERMITTING IT TO RUN IN MORE PLACES
WHERE IT IS NOT SUPPORTED BY ORACLE).***
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
181

Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
182
***THIS SOFTWARE IS INCOMPLETE AND IN ITS CURRENT STATE IS NOT CURRENTLY
183
184
185
186
100% COMPATIBLE WITH JAVA ME 8. THERE ARE CURRENTLY NO STABLE RELEASED VERSIONS
OF THIS SOFTWARE. AS SUCH THE FIRST MAJOR VERSION RELEASE WILL BE WHEN IT IS
COMPATIBLE SO AS TO NOT VIOLATE POTENTIAL LICENSES, AND IF POSSIBLE BE VERIFIED
WITH ANY APPLICABLE TCKS (SO IT WOULD BE AN "OFFICIAL" IMPLEMENTATION).***
Stephanie Gawroriski's avatar
Stephanie Gawroriski committed
187
188