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cc65 - a freeware C compiler for 6502 based systems
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Christian Groessler 1cc4fa9356 Atari: fix interrupt handling if extended memory is banked in 
Extendend memory is mapped over the main memory in the 0x4000..0x7FFF
area. Many DOSes disable interrupts while extended memory is banked in,
but not all (e.g. SpartaDOS-X).
This change modifies the initial interrupt handler to map in main memory
before chaining to the "worker" handlers.
Since the initial interrupt handler uses a data segment to store the
trampoline to chain to the original handler, introduce a new "LOWBSS"
segment to hold this trampoline. Otherwise the trampoline may end up
inside the 0x4000..0x7FFF area.

Add a link time warning if "LOWCODE" segment lays within the extended
memory window.
2018-09-05 11:28:15 +02:00
asminc Fixed and improved some pce comments. 2018-08-30 11:48:46 +02:00
cfg Atari: fix interrupt handling if extended memory is banked in 2018-09-05 11:28:15 +02:00
doc Fixed some mistakes (mostly in the documentation). 2018-08-30 11:48:46 +02:00
include Style changes. 2018-08-30 11:48:46 +02:00
libsrc Atari: fix interrupt handling if extended memory is banked in 2018-09-05 11:28:15 +02:00
samples Support --print-target-path with spaces. 2018-06-10 18:12:09 +02:00
src Made cc65's "Illegal escaped character" diagnostic show which code was escaped. 2018-08-21 08:58:21 -04:00
test Increased consistency. 2018-08-02 15:45:57 +02:00
testcode seek test: Test some additional error cases. 2018-08-20 22:24:48 +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 Added console 2018-03-13 22:19:19 +00:00

README.md

Windows Snapshot

Documentation

Wiki

Build Status

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 2600 console.
  • 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.