all repos — xyw @ 7eb2ae5a80f0efa16213f104a7f37ce769672b9c

A minimal virtual machine and assembler for terminals.

xyw.h

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#ifndef XYW_H
#define XYW_H

#define XYW_MODE_X 0x20
#define XYW_MODE_Y 0x40
#define XYW_MODE_W 0x80
#define XYW_TOTAL_INSTRUCTIONS 0x20
#define XYW_TOTAL_DEVICES 0x10

// clang-format off
#define PEEKW(d) (*(d) << 8 | (d)[1])
#define POKEW(d, v) { *(d) = (v) >> 8; (d)[1] = (v); }
// clang-format on

typedef unsigned char xyw_byte;
typedef unsigned short xyw_word;

typedef xyw_byte (*xyw_read)(xyw_byte addr, xyw_byte *error);
typedef void (*xyw_write)(xyw_byte addr, xyw_byte val, xyw_byte *error);
typedef xyw_word (*xyw_readw)(xyw_byte addr, xyw_byte *error);
typedef void (*xyw_writew)(xyw_byte addr, xyw_word val, xyw_byte *error);

typedef struct xyw_device
{
    xyw_read read;
    xyw_write write;
    xyw_readw readw;
    xyw_writew writew;
} xyw_device;

// clang-format off
#define xyw_dbg(...) do { if (xyw_debug) fprintf(stdout, __VA_ARGS__); } while(0)
// clang-format on

extern const char xyw_instructions[][4];
extern int xyw_debug;
extern xyw_device xyw_devices[XYW_TOTAL_DEVICES];

int xyw_assemble(const char *input, const char *output);
int xyw_run(const char *input);

#endif // XYW_H