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some skeleton for further codebase

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Luxferre
2022-08-07 22:20:48 +03:00
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@@ -127,9 +127,10 @@ Please also note that Equi doesn't specify any graphical or sound output capabil
## Reference implementation
Being a purely PC-oriented low-level runtime/programming environment, Equi has the reference implementation emulator/VM written in C (ANSI C89 standard), `equi.c`, compilable and runnable on all the systems supporting standard I/O. Note that this emulator:
Being a purely PC-oriented low-level runtime/programming environment, Equi has the reference implementation emulator/VM written in C (ANSI C89 standard), `equi.c`, compilable and runnable on all the systems supporting standard I/O. Note that, for portability reasons, this emulator:
- doesn't fully implement `P` instruction but instead outputs its parameters to the standard error stream and puts three 0x0000 values back onto the stack,
- doesn't implement non-blocking key input (the ',' instruction is identical to blocking key input instruction `?`),
- sandboxes the `{` and `}` operations using the file you supply in the command-line parameter. If you don't supply the file, these operations will effectively do nothing except putting 0x0000 (success status) onto the stack.
The source code file should compile using any mainstream C compiler with C89 support, like GCC/DJGPP, Clang, TCC etc. However, it is also being developed to be compilable with CC65 compiler for targets like Apple II or Atari 800. All the machine/target specific configuration is done at compile time, using compiler command-line switches. Here are the instructions to build Equi using different known C compilers.