Editing Cc65

{{lowercase title|cc65}}
{{Infobox software
 | name = cc65
 | logo = Cc65-logo.png
 | screenshot = 
 | caption = 
 | developer = Ullrich von Bassewitz
 | released = {{Start date and age|1998|11|15}}<ref>[http://unusedino.de/ec64/technical/c=hacking/ch17.html C=Hacking #17] first mention</ref>
 | latest release version = {{wikidata|property|preferred|references|edit|Q1052150|P348}}
 | latest release date = {{Start date and age|2020|11|20}}
 | latest preview version = 
 | programming language = [[ANSI C]]
 | operating system = Multiplatform
 | genre = [[Cross compiler]]
 | license = [[zlib license]]
 | website = {{URL|https://cc65.github.io}}
 }}

'''cc65''' is a cross development package for [[MOS Technology 6502|6502]] and [[WDC 65C02|65C02]] targets, including a macro [[Assembly language#Assembler|assembler]], a [[C (programming language)|C]] [[cross compiler]], [[Linker (computing)|linker]], [[File archiver|librarian]] and several other [[programming tool|tools]].

==Overview==
cc65 is based on a native C compiler that was originally adapted for the [[Atari 8-bit computers]] by John R. Dunning in 1989, which originated as a [[Small-C]] descendant. It has several extensions, and some of the limits of the original Small C compiler are gone.

The toolkit has largely been expanded by Ullrich von Bassewitz and other contributors. The actual cc65 compiler, a complete set of binary tools (assembler, linker, etc.) and runtime library are under a license identical to [[zlib]]'s.<ref>{{Cite web|url=https://github.com/cc65/cc65/commit/aeb849257277a6b98542de8579697b81c6dd70e6|title = Simplified license. · cc65/Cc65@aeb8492|website = [[GitHub]]}}</ref>

The compiler itself comes close to [[ANSI C]] compatibility, while C library features depend on the target platform's hardware. [[Stdio.h|stdio]] is supported on many platforms, as is [[Borland]]-style {{mono|[[conio.h]]}} screen handling. [[GEOS (8-bit operating system)|GEOS]] is also supported on the [[Commodore 64]] and the [[Apple II]]. The library supports many of the Commodore platforms ([[Commodore 64|C64]], [[Commodore 128|C128]], [[Commodore 16|C16/116]]/[[Commodore Plus/4|Plus/4]], [[Commodore CBM-II|P500 and 600/700 family]]), Apple II, [[Atari 8-bit computers]], [[Oric Atmos]], [[Nintendo Entertainment System]],<ref>{{Cite book |last=Hugg |first=Steven |title=Making Games for the NES |publisher=[[Amazon Digital Services LLC]] |year=2019 |isbn=9781075952722 |pages=231–232 |language=en}}</ref><ref>{{Cite book |last=Cruise |first=Tony |title=Classic Game Programming on the NES |publisher=[[Manning Publications]] |year=2024 |isbn=9781633438019 |pages=268 |language=en}}</ref> [[Watara Supervision]] game console, [[Synertek]] Systems [[SYM-1]] and [[Ohio Scientific]] Challenger 1P.<ref>{{Cite web|url=https://cc65.github.io/doc/osi.html|title = Ohio Scientific-specific information for cc65}}</ref>

Officially supported host systems include [[Linux]], [[Microsoft Windows]], [[MS-DOS]] and [[OS/2]], but the source code itself has been reported{{by whom|date=November 2017}} to work almost unmodified on many platforms beside these.

The ca65 macro assembler supports [[MOS Technology 6502|6502]], [[WDC 65C02|65C02]], and [[WDC 65C816|65C816]] processors, and can be used standalone without the C compiler.<ref>[https://cc65.github.io/doc/ca65.html ca65 Users Guide]</ref>

==Supported API==

===static===
*conio (text-based console I/O non-scrolling)
*dio (block-oriented disk I/O bypassing the file system)

===dynamic===
*em (expanded memory, used for all kinds of memory beyond the 6502's 64K barrier, similar [[Expanded memory|EMS]])
*joystick (relative input devices)
*mouse (absolute input devices)
*serial (communication)
*tgi (2D graphics primitives inspired by [[Borland Graphics Interface|BGI]])

{| class="wikitable"
! 		!![[conio.h|conio]]	!!dio	!!emd	!!joy	!!mou	!!ser	!!tgi
|-
! apple2
|		{{yes}}	||{{yes}}	||1	||1	||1	||1	||2
|-
! apple2enh
|	{{yes}}	||{{yes}}	||1	||1	||1	||1	||2
|-
! atari
|		{{yes}}	||{{yes}}	||	||2	||	||	||15<ref name="tgiAtari" />
|-
! atmos
|		{{yes}}	||	||	||	||	||	||1
|-
! c16
|		{{yes}}	||	||1	||1	||	||	||
|-
! c64
|		{{yes}}	||	||6	||4	||3	||1	||1
|-
! c128
|		{{yes}}	||	||5	||2	||3	||1	||2
|-
! cbm510
|		{{yes}}	||	||1	||1	||	||1	||
|-
! cbm610
|		{{yes}}	||	||1	||	||	||1	||
|-
! geos
|		{{yes}}	||{{yes}}	||1	||1	||	||	||1
<!--|-
! lunix
|		x	||	||	||1	||	||	||-->
|-
! lynx
|			||	||	||1	||	||1	||1
|-
! nes
|		{{yes}}	||	||	||1	||	||	||1
|-
! osic1p
|		{{yes}}	||	||	|| 	||	||	||
|-
! pet
|		{{yes}}	||	||	||1	||	||	||
|-
! plus4
|		{{yes}}	||	||	||1	||	||1	||
|-
! supervision
|			||	||	||	||	||	||
|-
! sym1
|			||	||	||	||	||	||
|-
! vic20
|		{{yes}}	||	||	||2	||	||	||
|}

Note: For static libraries, "Yes" means the feature is available. For dynamic libraries, the columns list the number of available drivers.

==References==
{{reflist|refs=
<ref name="tgiAtari">By Fatih Aygün. CIRCLE doesn't work at all, some graphics modes may crash on some machines.</ref>
}}

==External links==
* [https://web.archive.org/web/20210120204936/https://www.cc65.org/ Official website (archive)] (no longer maintained)
* [https://cc65.github.io Modern github fork of cc65]
* [http://hitmen.c02.at/html/tools_contiki.html Contiki desktop, written with cc65]
* [http://www.cc65.org/mailarchive/2009-11/7459.html Atari TGI 2009-11-02 release announcement on cc65 mailing list]
* [https://github.com/efornara/jbit/wiki/Android Android host]

[[Category:C (programming language) compilers]]
[[Category:Cross-compilers]]
[[Category:Free and open source compilers]]
[[Category:Assemblers]]
[[Category:Atari 8-bit computers]]
[[Category:Commodore 64]]
[[Category:Apple II family]]