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cc65 - a freeware C compiler for 6502 based systems
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7f52a770d9
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Oliver Schmidt 7f52a770d9 Removed joy_masks array. 
So far the joy_masks array allowed several joystick drivers for a single target to each have different joy_read return values. However this meant that every call to joy_read implied an additional joy_masks lookup to post-process the return value.

Given that almost all targets only come with a single joystick driver this seems an inappropriate overhead. Therefore now the target header files contain constants matching the return value of the joy_read of the joystick driver(s) on that target.

If there indeed are several joystick drivers for a single target they must agree on a common return value for joy_read. In some cases this was alredy the case as there's a "natural" return value for joy_read. However a few joystick drivers need to be adjusted. This may cause some overhead inside the driver. But that is for sure smaller than the overhead introduced by the joy_masks lookup before.

!!! ToDo !!!

The following three joystick drivers become broken with this commit and need to be adjusted:
- atrmj8.s
- c64-numpad.s
- vic20-stdjoy.s
2017-08-19 19:11:28 +02:00
asminc Removed joy_masks array. 2017-08-19 19:11:28 +02:00
cfg Fix regression of #pragma bss-name 2017-03-21 22:35:25 +01:00
doc Removed undesirable empty lines. 2017-07-31 13:50:27 +02:00
include Removed joy_masks array. 2017-08-19 19:11:28 +02:00
libsrc Removed joy_masks array. 2017-08-19 19:11:28 +02:00
samples make: change uppercase prefix var 2017-07-22 16:38:50 +02:00
src Merge pull request #468 from pmjdebruijn/samples 2017-07-23 02:09:20 +02:00
test Merge pull request #446 from clbr/lz4 2017-06-10 23:23:12 +02:00
testcode Removed joy_masks array. 2017-08-19 19:11:28 +02:00
util dont use that silly buffer 2015-11-29 21:15:10 +01:00
.gitattributes Added .gitattributes to force LF line endings on commit. 2017-03-12 18:13:18 +01:00
.gitignore Don't ignore more than necessary. 2016-06-01 22:36:38 +02:00
.travis.yml Migrate 'encrypted variables' variables to 'repository settings'. 2017-05-17 20:56:21 +02:00
LICENSE Simplified license. 2015-05-05 21:56:23 +02:00
Makefile Added "html" and "info" goals to the top-level Makefile. 2017-05-24 18:49:02 -04:00
Makefile.travis Fixed file name of Windows binary snapshot. 2015-01-20 21:00:44 +01:00
README.md README.md: PC-Engine is a console 2017-02-22 14:25:10 +01:00

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cc65 is a complete cross development package for 65(C)02 systems, including a powerful macro assembler, a C compiler, linker, librarian and several other tools.

cc65 has C and runtime library support for many of the old 6502 machines, including

  • the following Commodore machines:
    • VIC20
    • C16/C116 and Plus/4
    • C64
    • C128
    • CBM 510 (aka P500)
    • the 600/700 family
    • newer PET machines (not 2001).
  • the Apple ][+ and successors.
  • the Atari 8 bit machines.
  • the Atari 5200 console.
  • GEOS for the C64, C128 and Apple //e.
  • the Bit Corporation Gamate console.
  • the NEC PC-Engine (aka TurboGrafx-16) console.
  • the Nintendo Entertainment System (NES) console.
  • the Watara Supervision console.
  • the VTech Creativision console.
  • the Oric Atmos.
  • the Oric Telestrat.
  • the Lynx console.
  • the Ohio Scientific Challenger 1P.

The libraries are fairly portable, so creating a version for other 6502s shouldn't be too much work.