diff --git a/src/devices/system.c b/src/devices/system.c index 854f1d4..32ddc26 100644 --- a/src/devices/system.c +++ b/src/devices/system.c @@ -18,18 +18,29 @@ WITH REGARD TO THIS SOFTWARE. char *boot_rom; Uint16 dev_vers[0x10]; +static void +system_zero(Uxn *u, int soft) +{ + int i; + for(i = 0x100 * soft; i < 0x10000; i++) + u->ram[i] = 0; + for(i = 0x0; i < 0x100; i++) + u->dev[i] = 0; + u->wst.ptr = 0; + u->rst.ptr = 0; +} + static int system_load(Uxn *u, char *filename) { - int l, i = 0; FILE *f = fopen(filename, "rb"); - if(!f) - return 0; - l = fread(&u->ram[PAGE_PROGRAM], 0x10000 - PAGE_PROGRAM, 1, f); - while(l && ++i < RAM_PAGES) - l = fread(u->ram + 0x10000 * i, 0x10000, 1, f); - fclose(f); - return 1; + if(f) { + int i, l = fread(&u->ram[PAGE_PROGRAM], 0x10000 - PAGE_PROGRAM, 1, f); + while(l && ++i < RAM_PAGES) + l = fread(u->ram + 0x10000 * i, 0x10000, 1, f); + fclose(f); + } + return !!f; } static void @@ -68,35 +79,23 @@ system_version(char *name, char *date) return 0; } -void -system_boot(Uxn *u, int soft) -{ - int i; - for(i = 0x100 * soft; i < 0x10000; i++) - u->ram[i] = 0; - for(i = 0x0; i < 0x100; i++) - u->dev[i] = 0; - u->wst.ptr = 0; - u->rst.ptr = 0; -} - void system_reboot(Uxn *u, char *rom, int soft) { - system_boot(u, soft); + system_zero(u, soft); if(system_load(u, boot_rom)) if(uxn_eval(u, PAGE_PROGRAM)) boot_rom = rom; } int -system_init(Uxn *u, Uint8 *ram, char *rom) +system_boot(Uxn *u, Uint8 *ram, char *rom) { u->ram = ram; - system_boot(u, 0); + system_zero(u, 0); if(!system_load(u, rom)) if(!system_load(u, "boot.rom")) - return system_error("Init", "Failed to load rom."); + return system_error("Could not load rom", rom); boot_rom = rom; return 1; } diff --git a/src/devices/system.h b/src/devices/system.h index 21f783a..a5216db 100644 --- a/src/devices/system.h +++ b/src/devices/system.h @@ -16,7 +16,8 @@ void system_reboot(Uxn *u, char *rom, int soft); void system_inspect(Uxn *u); int system_version(char *emulator, char *date); int system_error(char *msg, const char *err); -int system_init(Uxn *u, Uint8 *ram, char *rom); +int system_boot(Uxn *u, Uint8 *ram, char *rom); + Uint8 system_dei(Uxn *u, Uint8 addr); void system_deo(Uxn *u, Uint8 *d, Uint8 port); diff --git a/src/uxn.c b/src/uxn.c index b8d00cc..9efac2a 100644 --- a/src/uxn.c +++ b/src/uxn.c @@ -11,71 +11,112 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE. */ -#define FLIP { s = ins & 0x40 ? &u->wst : &u->rst; } -#define JUMP(x) { if(m2) pc = (x); else pc += (Sint8)(x); } -#define POP1(o) { o = s->dat[--*sp]; } -#define POP2(o) { o = s->dat[--*sp] | (s->dat[--*sp] << 0x8); } -#define POPx(o) { if(m2) { POP2(o) } else POP1(o) } -#define PUSH1(y) { s->dat[s->ptr++] = (y); } -#define PUSH2(y) { tt = (y); s->dat[s->ptr++] = tt >> 0x8; s->dat[s->ptr++] = tt; } -#define PUSHx(y) { if(m2) { PUSH2(y) } else PUSH1(y) } -#define PEEK(o, x, r) { if(m2) { r = (x); o = ram[r++] << 8 | ram[r]; } else o = ram[(x)]; } -#define POKE(x, y, r) { if(m2) { r = (x); ram[r++] = y >> 8; ram[r] = y; } else ram[(x)] = (y); } -#define DEVR(o, p) { if(m2) { o = (emu_dei(u, p) << 8) | emu_dei(u, p + 1); } else o = emu_dei(u, p); } -#define DEVW(p, y) { if(m2) { emu_deo(u, p, y >> 8); emu_deo(u, p + 1, y); } else emu_deo(u, p, y); } +/* Registers +[ Z ][ Y ][ X ][ L ][ N ][ T ] < +[ . ][ . ][ . ][ H2 ][ . ] < +[ L2 ][ N2 ][ T2 ] < +*/ + +#define T *(s->dat + s->ptr) +#define N *(s->dat + (Uint8)(s->ptr - 1)) +#define L *(s->dat + (Uint8)(s->ptr - 2)) +#define X *(s->dat + (Uint8)(s->ptr - 3)) +#define Y *(s->dat + (Uint8)(s->ptr - 4)) +#define Z *(s->dat + (Uint8)(s->ptr - 5)) +#define T2 (N << 8 | T) +#define H2 (L << 8 | N) +#define N2 (X << 8 | L) +#define L2 (Z << 8 | Y) +#define T2_(v) { r = (v); T = r; N = r >> 8; } +#define N2_(v) { r = (v); L = r; X = r >> 8; } +#define L2_(v) { r = (v); Y = r; Z = r >> 8; } +#define FLIP { s = ins & 0x40 ? &u->wst : &u->rst; } +#define SHIFT(y) { s->ptr += (y); } +#define SET(x, y) { SHIFT((ins & 0x80) ? x + y : y) } int uxn_eval(Uxn *u, Uint16 pc) { - Uint8 t, kp, *sp, *ram = u->ram; - Uint16 tt, a, b, c; + Uint16 t, n, l, r; + Uint8 *ram = u->ram, *rr; if(!pc || u->dev[0x0f]) return 0; for(;;) { - Uint8 ins = ram[pc++], m2 = ins & 0x20; + Uint8 ins = ram[pc++]; Stack *s = ins & 0x40 ? &u->rst : &u->wst; - if(ins & 0x80) kp = s->ptr, sp = &kp; - else sp = &s->ptr; - switch(ins & 0x1f) { + switch(ins & 0x3f) { + /* IMM */ case 0x00: case 0x20: - switch(ins) { - case 0x00: /* BRK */ return 1; - case 0x20: /* JCI */ POP1(b) if(!b) { pc += 2; break; } - case 0x40: /* JMI */ a = ram[pc++] << 8 | ram[pc++]; pc += a; break; - case 0x60: /* JSI */ PUSH2(pc + 2) a = ram[pc++] << 8 | ram[pc++]; pc += a; break; - case 0x80: case 0xc0: /* LIT */ PUSH1(ram[pc++]) break; - case 0xa0: case 0xe0: /* LIT2 */ PUSH1(ram[pc++]) PUSH1(ram[pc++]) break; - } break; - case 0x01: /* INC */ POPx(a) PUSHx(a + 1) break; - case 0x02: /* POP */ POPx(a) break; - case 0x03: /* NIP */ POPx(a) POPx(b) PUSHx(a) break; - case 0x04: /* SWP */ POPx(a) POPx(b) PUSHx(a) PUSHx(b) break; - case 0x05: /* ROT */ POPx(a) POPx(b) POPx(c) PUSHx(b) PUSHx(a) PUSHx(c) break; - case 0x06: /* DUP */ POPx(a) PUSHx(a) PUSHx(a) break; - case 0x07: /* OVR */ POPx(a) POPx(b) PUSHx(b) PUSHx(a) PUSHx(b) break; - case 0x08: /* EQU */ POPx(a) POPx(b) PUSH1(b == a) break; - case 0x09: /* NEQ */ POPx(a) POPx(b) PUSH1(b != a) break; - case 0x0a: /* GTH */ POPx(a) POPx(b) PUSH1(b > a) break; - case 0x0b: /* LTH */ POPx(a) POPx(b) PUSH1(b < a) break; - case 0x0c: /* JMP */ POPx(a) JUMP(a) break; - case 0x0d: /* JCN */ POPx(a) POP1(b) if(b) JUMP(a) break; - case 0x0e: /* JSR */ POPx(a) FLIP PUSH2(pc) JUMP(a) break; - case 0x0f: /* STH */ POPx(a) FLIP PUSHx(a) break; - case 0x10: /* LDZ */ POP1(a) PEEK(b, a, t) PUSHx(b) break; - case 0x11: /* STZ */ POP1(a) POPx(b) POKE(a, b, t) break; - case 0x12: /* LDR */ POP1(a) PEEK(b, pc + (Sint8)a, tt) PUSHx(b) break; - case 0x13: /* STR */ POP1(a) POPx(b) POKE(pc + (Sint8)a, b, tt) break; - case 0x14: /* LDA */ POP2(a) PEEK(b, a, tt) PUSHx(b) break; - case 0x15: /* STA */ POP2(a) POPx(b) POKE(a, b, tt) break; - case 0x16: /* DEI */ POP1(a) DEVR(b, a) PUSHx(b) break; - case 0x17: /* DEO */ POP1(a) POPx(b) DEVW(a, b) break; - case 0x18: /* ADD */ POPx(a) POPx(b) PUSHx(b + a) break; - case 0x19: /* SUB */ POPx(a) POPx(b) PUSHx(b - a) break; - case 0x1a: /* MUL */ POPx(a) POPx(b) PUSHx(b * a) break; - case 0x1b: /* DIV */ POPx(a) POPx(b) PUSHx(a ? b / a : 0) break; - case 0x1c: /* AND */ POPx(a) POPx(b) PUSHx(b & a) break; - case 0x1d: /* ORA */ POPx(a) POPx(b) PUSHx(b | a) break; - case 0x1e: /* EOR */ POPx(a) POPx(b) PUSHx(b ^ a) break; - case 0x1f: /* SFT */ POP1(a) POPx(b) PUSHx(b >> (a & 0xf) << (a >> 4)) break; + switch(ins) { + case 0x00: /* BRK */ return 1; + case 0x20: /* JCI */ t=T; SHIFT(-1) if(!t) { pc += 2; break; } /* fall-through */ + case 0x40: /* JMI */ rr = ram + pc; pc += 2 + PEEK2(rr); break; + case 0x60: /* JSI */ SHIFT( 2) rr = ram + pc; pc += 2; T2_(pc); pc += PEEK2(rr); break; + case 0x80: /* LIT */ case 0xc0: SHIFT( 1) T = ram[pc++]; break; + case 0xa0: /* LIT2 */ case 0xe0: SHIFT( 2) N = ram[pc++]; T = ram[pc++]; break; + } break; + /* ALU */ + case 0x01: /* INC */ t=T; SET(1, 0) T = t + 1; break; + case 0x21: /* INC2 */ t=T2; SET(2, 0) T2_(t + 1) break; + case 0x02: /* POP */ SET(1,-1) break; + case 0x22: /* POP2 */ SET(2,-2) break; + case 0x03: /* NIP */ t=T; SET(2,-1) T = t; break; + case 0x23: /* NIP2 */ t=T2; SET(4,-2) T2_(t) break; + case 0x04: /* SWP */ t=T;n=N; SET(2, 0) T = n; N = t; break; + case 0x24: /* SWP2 */ t=T2;n=N2; SET(4, 0) T2_(n) N2_(t) break; + case 0x05: /* ROT */ t=T;n=N;l=L; SET(3, 0) T = l; N = t; L = n; break; + case 0x25: /* ROT2 */ t=T2;n=N2;l=L2; SET(6, 0) T2_(l) N2_(t) L2_(n) break; + case 0x06: /* DUP */ t=T; SET(1, 1) T = t; N = t; break; + case 0x26: /* DUP2 */ t=T2; SET(2, 2) T2_(t) N2_(t) break; + case 0x07: /* OVR */ t=T;n=N; SET(2, 1) T = n; N = t; L = n; break; + case 0x27: /* OVR2 */ t=T2;n=N2; SET(4, 2) T2_(n) N2_(t) L2_(n) break; + case 0x08: /* EQU */ t=T;n=N; SET(2,-1) T = n == t; break; + case 0x28: /* EQU2 */ t=T2;n=N2; SET(4,-3) T = n == t; break; + case 0x09: /* NEQ */ t=T;n=N; SET(2,-1) T = n != t; break; + case 0x29: /* NEQ2 */ t=T2;n=N2; SET(4,-3) T = n != t; break; + case 0x0a: /* GTH */ t=T;n=N; SET(2,-1) T = n > t; break; + case 0x2a: /* GTH2 */ t=T2;n=N2; SET(4,-3) T = n > t; break; + case 0x0b: /* LTH */ t=T;n=N; SET(2,-1) T = n < t; break; + case 0x2b: /* LTH2 */ t=T2;n=N2; SET(4,-3) T = n < t; break; + case 0x0c: /* JMP */ t=T; SET(1,-1) pc += (Sint8)t; break; + case 0x2c: /* JMP2 */ t=T2; SET(2,-2) pc = t; break; + case 0x0d: /* JCN */ t=T;n=N; SET(2,-2) if(n) pc += (Sint8)t; break; + case 0x2d: /* JCN2 */ t=T2;n=L; SET(3,-3) if(n) pc = t; break; + case 0x0e: /* JSR */ t=T; SET(1,-1) FLIP SHIFT(2) T2_(pc) pc += (Sint8)t; break; + case 0x2e: /* JSR2 */ t=T2; SET(2,-2) FLIP SHIFT(2) T2_(pc) pc = t; break; + case 0x0f: /* STH */ t=T; SET(1,-1) FLIP SHIFT(1) T = t; break; + case 0x2f: /* STH2 */ t=T2; SET(2,-2) FLIP SHIFT(2) T2_(t) break; + case 0x10: /* LDZ */ t=T; SET(1, 0) T = ram[t]; break; + case 0x30: /* LDZ2 */ t=T; SET(1, 1) N = ram[t++]; T = ram[(Uint8)t]; break; + case 0x11: /* STZ */ t=T;n=N; SET(2,-2) ram[t] = n; break; + case 0x31: /* STZ2 */ t=T;n=H2; SET(3,-3) ram[t++] = n >> 8; ram[(Uint8)t] = n; break; + case 0x12: /* LDR */ t=T; SET(1, 0) r = pc + (Sint8)t; T = ram[r]; break; + case 0x32: /* LDR2 */ t=T; SET(1, 1) r = pc + (Sint8)t; N = ram[r++]; T = ram[r]; break; + case 0x13: /* STR */ t=T;n=N; SET(2,-2) r = pc + (Sint8)t; ram[r] = n; break; + case 0x33: /* STR2 */ t=T;n=H2; SET(3,-3) r = pc + (Sint8)t; ram[r++] = n >> 8; ram[r] = n; break; + case 0x14: /* LDA */ t=T2; SET(2,-1) T = ram[t]; break; + case 0x34: /* LDA2 */ t=T2; SET(2, 0) N = ram[t++]; T = ram[t]; break; + case 0x15: /* STA */ t=T2;n=L; SET(3,-3) ram[t] = n; break; + case 0x35: /* STA2 */ t=T2;n=N2; SET(4,-4) ram[t++] = n >> 8; ram[t] = n; break; + case 0x16: /* DEI */ t=T; SET(1, 0) T = emu_dei(u, t); break; + case 0x36: /* DEI2 */ t=T; SET(1, 1) N = emu_dei(u, t++); T = emu_dei(u, t); break; + case 0x17: /* DEO */ t=T;n=N; SET(2,-2) emu_deo(u, t, n); break; + case 0x37: /* DEO2 */ t=T;n=N;l=L; SET(3,-3) emu_deo(u, t++, l); emu_deo(u, t, n); break; + case 0x18: /* ADD */ t=T;n=N; SET(2,-1) T = n + t; break; + case 0x38: /* ADD2 */ t=T2;n=N2; SET(4,-2) T2_(n + t) break; + case 0x19: /* SUB */ t=T;n=N; SET(2,-1) T = n - t; break; + case 0x39: /* SUB2 */ t=T2;n=N2; SET(4,-2) T2_(n - t) break; + case 0x1a: /* MUL */ t=T;n=N; SET(2,-1) T = n * t; break; + case 0x3a: /* MUL2 */ t=T2;n=N2; SET(4,-2) T2_(n * t) break; + case 0x1b: /* DIV */ t=T;n=N; SET(2,-1) T = t ? n / t : 0; break; + case 0x3b: /* DIV2 */ t=T2;n=N2; SET(4,-2) T2_(t ? n / t : 0) break; + case 0x1c: /* AND */ t=T;n=N; SET(2,-1) T = n & t; break; + case 0x3c: /* AND2 */ t=T2;n=N2; SET(4,-2) T2_(n & t) break; + case 0x1d: /* ORA */ t=T;n=N; SET(2,-1) T = n | t; break; + case 0x3d: /* ORA2 */ t=T2;n=N2; SET(4,-2) T2_(n | t) break; + case 0x1e: /* EOR */ t=T;n=N; SET(2,-1) T = n ^ t; break; + case 0x3e: /* EOR2 */ t=T2;n=N2; SET(4,-2) T2_(n ^ t) break; + case 0x1f: /* SFT */ t=T;n=N; SET(2,-1) T = n >> (t & 0xf) << (t >> 4); break; + case 0x3f: /* SFT2 */ t=T;n=H2; SET(3,-1) T2_(n >> (t & 0xf) << (t >> 4)) break; } } } diff --git a/src/uxn11.c b/src/uxn11.c index a1ace98..cfa52b5 100644 --- a/src/uxn11.c +++ b/src/uxn11.c @@ -202,16 +202,6 @@ emu_event(Uxn *u) } } -static int -emu_init(void) -{ - display = XOpenDisplay(NULL); - if(!display) - return system_error("X11", "Could not open display"); - screen_resize(WIDTH, HEIGHT, 1); - return 1; -} - static int emu_run(Uxn *u, char *rom) { @@ -274,16 +264,24 @@ main(int argc, char **argv) { Uxn u = {0}; int i = 1; - if(i == argc) - return system_error("usage", "uxn11 [-v] file.rom [args...]"); - /* Read flags */ - if(argv[i][0] == '-' && argv[i][1] == 'v') - return system_version("Uxn11 - Graphical Varvara Emulator", "18 Nov 2023"); - if(!emu_init()) - return system_error("Init", "Failed to initialize varvara."); - if(!system_init(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++])) - return system_error("Init", "Failed to initialize uxn."); + if(i == argc) { + fprintf(stdout, "usage: %s [-v] file.rom [args..]\n", argv[0]); + return 0; + } + if(argv[i][0] == '-' && argv[i][1] == 'v') { + fprintf(stdout, "Uxn11 - Varvara Emulator, 15 Jan 2023.\n"); + i++; + } + if(!(display = XOpenDisplay(NULL))) { + fprintf(stdout, "Could not open display.\n"); + return 0; + } + if(!system_boot(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++])) { + fprintf(stdout, "Could not boot.\n"); + return 0; + } /* Game Loop */ + screen_resize(WIDTH, HEIGHT, 1); u.dev[0x17] = argc - i; if(uxn_eval(&u, PAGE_PROGRAM)) { console_listen(&u, i, argc, argv); diff --git a/src/uxncli.c b/src/uxncli.c index 68f2932..145e266 100644 --- a/src/uxncli.c +++ b/src/uxncli.c @@ -72,7 +72,7 @@ main(int argc, char **argv) /* Read flags */ if(argv[i][0] == '-' && argv[i][1] == 'v') return system_version("Uxncli - Console Varvara Emulator", "11 Nov 2023"); - if(!system_init(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++])) + if(!system_boot(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++])) return system_error("Init", "Failed to initialize uxn."); /* Game Loop */ u.dev[0x17] = argc - i;