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Commit Graph

19 Commits

Author SHA1 Message Date
Christian Groessler
85170998ad more atarixl linker cfg file cleanups; adapt atarixl-overlay.cfg 2013-09-13 21:47:39 +02:00
Christian Groessler
5caf6c8854 atarixl linker cfg file cleanups; set default load address to 400 for atarixl 2013-09-13 20:29:24 +02:00
Christian Groessler
237bb9850c Remove obsolete ZPSAVE segment. 2013-09-13 16:00:56 +02:00
Christian Groessler
8bc4b4c636 add code to add free shadow memory to heap (currently disabled) 2013-09-11 22:43:35 +02:00
Christian Groessler
21e6654524 adjust size of SRPREP to account for 1K aligned character generator
(not page aligned as I thought before)
2013-09-04 22:25:29 +02:00
Christian Groessler
405a5df431 Merge remote-tracking branch 'upstream/master' 2013-08-21 16:38:13 +02:00
Oliver Schmidt
1dab0103f1 Made EXTZP segment optional on GEOS as it is used only by CONIO. 2013-08-20 07:43:47 +02:00
Christian Groessler
d3d7499faa Remove saving and restoring of zeropage variables.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	cfg/atarixl.cfg
	libsrc/atari/crt0.s
2013-07-03 11:38:28 +02:00
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
Christian Groessler
1e9823306a Merge remote-tracking branch 'upstream/master' 2013-06-28 00:49:12 +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
Christian Groessler
85dc09fd9f add LOWBUFS segment 2013-06-12 13:26:26 +02:00
Christian Groessler
164fb56580 move ZPSAVE into area already saved by 2nd load chunk 2013-05-31 01:35:19 +02:00
Christian Groessler
34cf7657e8 Add two load chunks:
- First chunk checks system (if it's XL and memory is ok).
 - Second chunk contains the contents for the shadow memory beneath the
   ROM and copies the contents to their destination address.
   It also moves the screen memory to low memory in front of the program.
2013-05-30 02:26:15 +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