52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/*
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Copyright (c) 2021 Devine Lu Linvega
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE.
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*/
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#define PAGE_PROGRAM 0x0100
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/* clang-format off */
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#define POKE2(d, v) { (d)[0] = (v) >> 8; (d)[1] = (v); }
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#define PEEK2(d) ((d)[0] << 8 | (d)[1])
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#define DEO(p, value) { u->dev[p] = value; if((deo_mask[p >> 4] >> (p & 0xf)) & 0x1) emu_deo(u, p); }
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#define DEI(p) ((dei_mask[(p) >> 4] >> ((p) & 0xf)) & 0x1 ? emu_dei(u, (p)) : u->dev[(p)])
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/* clang-format on */
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typedef unsigned char Uint8;
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typedef signed char Sint8;
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typedef unsigned short Uint16;
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typedef signed short Sint16;
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typedef unsigned int Uint32;
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typedef struct {
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Uint8 dat[255], ptr;
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} Stack;
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typedef struct Uxn {
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Uint8 *ram, dev[256];
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Stack wst, rst;
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Uint8 (*dei)(struct Uxn *u, Uint8 addr);
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void (*deo)(struct Uxn *u, Uint8 addr);
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} Uxn;
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/* required functions */
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extern Uint8 emu_dei(Uxn *u, Uint8 addr);
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extern void emu_deo(Uxn *u, Uint8 addr);
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extern int emu_halt(Uxn *u, Uint8 instr, Uint8 err, Uint16 addr);
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extern Uint16 dei_mask[];
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extern Uint16 deo_mask[];
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/* built-ins */
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int uxn_boot(Uxn *u, Uint8 *ram);
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int uxn_eval(Uxn *u, Uint16 pc);
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