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Commit Graph

7 Commits

Author SHA1 Message Date
Christian Groessler
7ebaec1802 Don't save and restore the zero page locations used.
Saves 19 bytes code (in the exe file) and reduces memory footprint
of the program by 45 bytes (code & bss).
2013-07-02 19:55:00 +02:00
Oliver Schmidt
5edcd639e0 Made EXTZP segment option for modules.
This allows to remove the "add empty EXTZP segement to avoid warnings"
approach.
2013-06-28 00:30:24 +02:00
Oliver Schmidt
7572834ebf Use cbm_load() to load overlays on CBMs. 2013-05-29 01:12:24 +02:00
Oliver Schmidt
98c47d1877 Introduced target 'atarixl'.
The target 'atarixl' is to be used for Atari XL (and better) machines.
It will disable the OS ROM and enable the Shadow RAM available on
those machine.

Note: This commit is only the inital step towards for this goal that just
replicates the target 'atari' as a starting point!
2013-05-28 21:56:37 +02:00
Oliver Schmidt
55f9e6ac25 Added 'sim6502' and 'sim65C02' targets.
The targets allow to run cc65 programs in the sim65 exection
einvironment. As there are no "real" i/o facilities there's no
need for header files. Paravirtualized entry points are mapped
to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF.

The binary format includes a one-byte header indicating the required
execution environment: The value 0 means 6502 and the value 1
means 65C02. The load adress for the binary is fixed to $0200.

Note: Running sim65C02 programs currently doesn't work bcause
sim65 doesn't actually implement 65C02 opcodes.
2013-05-20 20:35:42 +02:00
Oliver Schmidt
da255245ad Adjusted comment. 2013-04-09 23:10:35 +02:00
Oliver Schmidt
37c492b544 Replaced builtin linker configs with ordinary .cfg files.
The benefits are:
- Independency of ld65 build from perl
- More transparent behaviour
2013-04-09 23:09:46 +02:00