mirror of https://git.sr.ht/~rabbits/uxn
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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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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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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#define PAGE_PROGRAM 0x0100
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#define VISOR_DEV 0xfa00
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#define VISOR_WST 0xfb00
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#define VISOR_RST 0xfc00
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#define PAGE_DEV 0xfd00
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#define PAGE_WST 0xfe00
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#define PAGE_RST 0xff00
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/* clang-format off */
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#define DEVPEEK16(o, x) { (o) = (d->dat[(x)] << 8) + d->dat[(x) + 1]; }
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#define DEVPOKE16(x, y) { d->dat[(x)] = (y) >> 8; d->dat[(x) + 1] = (y); }
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#define GETVECTOR(d) ((d)->dat[0] << 8 | (d)->dat[1])
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/* clang-format on */
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typedef struct {
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Uint8 ptr, dat[255];
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} Stack;
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typedef struct Device {
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struct Uxn *u;
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Uint8 dat[16];
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Uint8 (*dei)(struct Device *d, Uint8);
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void (*deo)(struct Device *d, Uint8);
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} Device;
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typedef struct Uxn {
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Uint8 *ram;
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Stack wst, rst;
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Device dev[16];
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} Uxn;
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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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int uxn_halt(Uxn *u, Uint8 error, Uint16 addr);
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int uxn_interrupt(Uxn *u);
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Device *uxn_port(Uxn *u, Uint8 id, Uint8 (*deifn)(Device *, Uint8), void (*deofn)(Device *, Uint8));
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