etc/uxn
0
0
Fork 0
mirror of https://git.sr.ht/~rabbits/uxn synced 2024-11-22 22:05:11 +00:00
Code Issues Projects Releases Wiki Activity

(uxn.c) Reconnected the wires to the old core to be compatible with emu

Browse source
This commit is contained in:
neauoire 2023-08-07 12:07:39 -07:00
parent 222246748e
commit e0bbf38af5
1 changed files with 19 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

43
etc/archives/uxn.c
View file

@ -1,3 +1,4 @@
#include <stdio.h>
#include "uxn.h"
/*
@ -11,22 +12,20 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
*/
/* a,b,c: general use. m2: byte/short mode flag.
tsp: macro temp stack ptr. ksp: "keep" mode copy of stack ptr. sp: ptr to stack ptr.
x,y: macro in params. o: macro out param. */
#define HALT(c) { return uxn_halt(u, instr, (c), pc - 1); }
#define HALT(c) { return emu_halt(u, instr, (c), pc - 1); }
#define JUMP(x) { if(m2) pc = (x); else pc += (Sint8)(x); }
#define PUSH8(x) { if(s->ptr == 0xff) HALT(2) s->dat[s->ptr++] = (x); }
#define PUSH16(x) { if((tsp = s->ptr) >= 0xfe) HALT(2) t = (x); POKE16(&s->dat[tsp], t); s->ptr = tsp + 2; }
#define PUSH16(x) { if((tsp = s->ptr) >= 0xfe) HALT(2) t = (x); POKE2(&s->dat[tsp], t); s->ptr = tsp + 2; }
#define PUSH(x) { if(m2) { PUSH16(x) } else { PUSH8(x) } }
#define POP8(o) { if(*sp == 0x00) HALT(1) o = s->dat[--*sp]; }
#define POP16(o) { if((tsp = *sp) <= 0x01) HALT(1) o = PEEK16(&s->dat[tsp - 2]); *sp = tsp - 2; }
#define POP16(o) { if((tsp = *sp) <= 0x01) HALT(1) o = PEEK2(&s->dat[tsp - 2]); *sp = tsp - 2; }
#define POP(o) { if(m2) { POP16(o) } else { POP8(o) } }
#define POKE(x, y) { if(m2) { t = (y); POKE16(u->ram + x, t) } else { u->ram[(x)] = (y); } }
#define PEEK(o, x) { if(m2) { o = PEEK16(u->ram + x); } else o = u->ram[(x)]; }
#define DEVR(o, x) { o = u->dei(u, x); if(m2) o = (o << 8) | u->dei(u, (x) + 1); }
#define DEVW(x, y) { if(m2) { u->deo(u, (x), (y) >> 8); u->deo(u, (x) + 1, (y)); } else { u->deo(u, x, (y)); } }
#define POKE(x, y) { if(m2) { t = (y); POKE2(u->ram + x, t) } else { u->ram[(x)] = (y); } }
#define PEEK(o, x) { if(m2) { o = PEEK2(u->ram + x); } else o = u->ram[(x)]; }
#define DEI(port) { }
#define DEO(port, value) { u->dev[(port)] = (value); if((deo_mask[(port) >> 4] >> ((port) & 0xf)) & 0x1) emu_deo(u, (port)); }
#define DEVR(dest, port) { if(m2) { dest = (emu_dei(u, (port)) << 8) + emu_dei(u, (port+1)); } else { dest = emu_dei(u, (port)); } }
#define DEVW(port, value) { if(m2) { DEO((port),(value >> 8)) DEO((port+1),(value)) } else { DEO((port),(value)) } }
int
uxn_eval(Uxn *u, Uint16 pc)
@ -37,11 +36,12 @@ uxn_eval(Uxn *u, Uint16 pc)
if(!pc || u->dev[0x0f]) return 0;
for(;;) {
instr = u->ram[pc++];
/* printf("%02x\n", instr); */
opcode = instr & 0x1f;
/* Short Mode */
m2 = instr & 0x20;
/* Return Mode */
s = instr & 0x40 ? u->rst : u->wst;
s = instr & 0x40 ? &u->rst : &u->wst;
/* Keep Mode */
if(instr & 0x80) { ksp = s->ptr; sp = &ksp; }
else sp = &s->ptr;
@ -50,12 +50,12 @@ uxn_eval(Uxn *u, Uint16 pc)
/* Immediate */
case -0x0: /* BRK */ return 1;
case -0x1: /* JCI */ POP8(b) if(!b) { pc += 2; break; } /* else fallthrough */
case -0x2: /* JMI */ pc += PEEK16(u->ram + pc) + 2; break;
case -0x3: /* JSI */ s = u->rst; PUSH16(pc + 2) pc += PEEK16(u->ram + pc) + 2; break;
case -0x2: /* JMI */ pc += PEEK2(u->ram + pc) + 2; break;
case -0x3: /* JSI */ s = &u->rst; PUSH16(pc + 2) pc += PEEK2(u->ram + pc) + 2; break;
case -0x4: /* LIT */
case -0x6: /* LITr */ a = u->ram[pc++]; PUSH8(a) break;
case -0x5: /* LIT2 */
case -0x7: /* LIT2r */ PUSH16(PEEK16(u->ram + pc)) pc += 2; break;
case -0x7: /* LIT2r */ PUSH16(PEEK2(u->ram + pc)) pc += 2; break;
/* ALU */
case 0x01: /* INC */ POP(a) PUSH(a + 1) break;
case 0x02: /* POP */ POP(a) break;
@ -70,8 +70,8 @@ uxn_eval(Uxn *u, Uint16 pc)
case 0x0b: /* LTH */ POP(a) POP(b) PUSH8(b < a) break;
case 0x0c: /* JMP */ POP(a) JUMP(a) break;
case 0x0d: /* JCN */ POP(a) POP8(b) if(b) JUMP(a) break;
case 0x0e: /* JSR */ POP(a) s = (instr & 0x40) ? u->wst : u->rst; PUSH16(pc) JUMP(a) break;
case 0x0f: /* STH */ POP(a) s = (instr & 0x40) ? u->wst : u->rst; PUSH(a) break;
case 0x0e: /* JSR */ POP(a) s = (instr & 0x40) ? &u->wst : &u->rst; PUSH16(pc) JUMP(a) break;
case 0x0f: /* STH */ POP(a) s = (instr & 0x40) ? &u->wst : &u->rst; PUSH(a) break;
case 0x10: /* LDZ */ POP8(a) PEEK(b, a) PUSH(b) break;
case 0x11: /* STZ */ POP8(a) POP(b) POKE(a, b) break;
case 0x12: /* LDR */ POP8(a) PEEK(b, pc + (Sint8)a) PUSH(b) break;
@ -93,17 +93,12 @@ uxn_eval(Uxn *u, Uint16 pc)
}
int
uxn_boot(Uxn *u, Uint8 *ram, Dei *dei, Deo *deo)
uxn_boot(Uxn *u, Uint8 *ram)
{
Uint32 i;
char *cptr = (char *)u;
for(i = 0; i < sizeof(*u); i++)
cptr[i] = 0x00;
u->wst = (Stack *)(ram + 0xf0000);
u->rst = (Stack *)(ram + 0xf0100);
u->dev = (Uint8 *)(ram + 0xf0200);
cptr[i] = 0;
u->ram = ram;
u->dei = dei;
u->deo = deo;
return 1;
}