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Added 'sim6502' and 'sim65C02' targets.

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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.
This commit is contained in:
Oliver Schmidt
2013-05-20 20:35:42 +02:00
parent 3a028fb621
commit 55f9e6ac25
13 changed files with 331 additions and 1 deletions
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35
cfg/sim65c02.cfg Normal file
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SYMBOLS {
__EXEHDR__: type = import;
__STACKSIZE__: type = weak, value = $0800; # 2k stack
}
MEMORY {
ZP: file = "", start = $0000, size = $001A;
HEADER: file = %O, start = $0000, size = $0001;
RAM: file = %O, define = yes, start = $0200, size = $FDF0 - __STACKSIZE__;
}
SEGMENTS {
EXEHDR: load = HEADER, type = ro;
STARTUP: load = RAM, type = ro;
LOWCODE: load = RAM, type = ro, optional = yes;
INIT: load = RAM, type = ro, define = yes, optional = yes;
CODE: load = RAM, type = ro;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
}
FEATURES {
CONDES: type = constructor,
label = __CONSTRUCTOR_TABLE__,
count = __CONSTRUCTOR_COUNT__,
segment = INIT;
CONDES: type = destructor,
label = __DESTRUCTOR_TABLE__,
count = __DESTRUCTOR_COUNT__,
segment = RODATA;
CONDES: type = interruptor,
label = __INTERRUPTOR_TABLE__,
count = __INTERRUPTOR_COUNT__,
segment = RODATA,
import = __CALLIRQ__;
}