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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.
17 lines
432 B
ArmAsm
17 lines
432 B
ArmAsm
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; Oliver Schmidt, 2013-05-16
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;
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; int open (const char* name, int flags, ...);
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; int __fastcall__ close (int fd);
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; int __fastcall__ read (int fd, void* buf, unsigned count);
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; int __fastcall__ write (int fd, const void* buf, unsigned count);
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;
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.export exit, _open, _close, _read, _write
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exit := $FFF0
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_open := $FFF1
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_close := $FFF2
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_read := $FFF3
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_write := $FFF4
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