diff --git a/src/uxn.c b/src/uxn.c index 14c4382..cf48d82 100644 --- a/src/uxn.c +++ b/src/uxn.c @@ -46,8 +46,14 @@ uxn_eval(Uxn *u, Uint16 pc) /* Short Mode */ bs = instr & 0x20; switch(instr & 0x1f) { - case 0x00: /* LIT */ if(bs) { PEEK16(a, pc) PUSH16(src, a) pc += 2; } - else { a = u->ram[pc]; PUSH8(src, a) pc++; } break; + case 0x00: + /* Literals/Calls */ + if(instr == 0x20) /* JMI */ { sp = &u->wst->ptr; PEEK16(a, pc) pc = a; } + else if(instr == 0x40) /* JCI */ { sp = &u->wst->ptr; src = u->wst; POP8(a) PEEK16(b, pc) pc = a ? (Uint16)b : pc + 2; } + else if(instr == 0x60) /* JSI */ { sp = &u->wst->ptr; PEEK16(a, pc) PUSH16(u->rst, pc + 2) pc = a; } + else if(bs) /* LIT2 */ { PEEK16(a, pc) PUSH16(src, a) pc = pc + 2; } + else /* LITr */ { a = u->ram[pc++]; PUSH8(src, a) } break; + /* ALU */ case 0x01: /* INC */ POP(a) PUSH(src, a + 1) break; case 0x02: /* POP */ POP(a) break; case 0x03: /* NIP */ POP(a) POP(b) PUSH(src, a) break;