Game boy模拟器：完整的 Z80 内核CPU源码
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/**
* jsGB: Z80 core
* Imran Nazar, May 2009
* Notes: This is a GameBoy Z80, not a Z80. There are differences.
* Bugs: If PC wraps at the top of memory, this will not be caught until the end of an instruction
*/
Z80 = {
_r: {
a:0, b:0, c:0, d:0, e:0, h:0, l:0, f:0,
sp:0, pc:0, i:0, r:0,
m:0, t:0,
ime:0
},
_clock: {m:0, t:0},
_halt: 0,
_stop: 0,
reset: function() {
Z80._r.a=0; Z80._r.b=0; Z80._r.c=0; Z80._r.d=0; Z80._r.e=0; Z80._r.h=0; Z80._r.l=0; Z80._r.f=0;
Z80._r.sp=0; Z80._r.pc=0; Z80._r.i=0; Z80._r.r=0;
Z80._r.m=0; Z80._r.t=0;
Z80._halt=0; Z80._stop=0;
Z80._clock.m=0; Z80._clock.t=0;
Z80._r.ime=1;
},
exec: function() {
Z80._r.r = (Z80._r.r+1) & 127;
Z80._map[MMU.rb(Z80._r.pc++)]();
Z80._r.pc &= 65535;
Z80._clock.m += Z80._r.m; Z80._clock.t += Z80._r.t;
if(MMU._inbios && Z80._r.pc == 0x0100) MMU._inbios=0;
},
_ops: {
/*--- Load/store ---*/
LDrr_bb: function() { Z80._r.b=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_bc: function() { Z80._r.b=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_bd: function() { Z80._r.b=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_be: function() { Z80._r.b=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_bh: function() { Z80._r.b=Z80._r.h; Z80._r.m=1; Z80._r.t=4; },
LDrr_bl: function() { Z80._r.b=Z80._r.l; Z80._r.m=1; Z80._r.t=4; },
LDrr_ba: function() { Z80._r.b=Z80._r.a; Z80._r.m=1; Z80._r.t=4; },
LDrr_cb: function() { Z80._r.c=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_cc: function() { Z80._r.c=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_cd: function() { Z80._r.c=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_ce: function() { Z80._r.c=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_ch: function() { Z80._r.c=Z80._r.h; Z80._r.m=1; Z80._r.t=4; },
LDrr_cl: function() { Z80._r.c=Z80._r.l; Z80._r.m=1; Z80._r.t=4; },
LDrr_ca: function() { Z80._r.c=Z80._r.a; Z80._r.m=1; Z80._r.t=4; },
LDrr_db: function() { Z80._r.d=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_dc: function() { Z80._r.d=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_dd: function() { Z80._r.d=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_de: function() { Z80._r.d=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_dh: function() { Z80._r.d=Z80._r.h; Z80._r.m=1; Z80._r.t=4; },
LDrr_dl: function() { Z80._r.d=Z80._r.l; Z80._r.m=1; Z80._r.t=4; },
LDrr_da: function() { Z80._r.d=Z80._r.a; Z80._r.m=1; Z80._r.t=4; },
LDrr_eb: function() { Z80._r.e=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_ec: function() { Z80._r.e=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_ed: function() { Z80._r.e=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_ee: function() { Z80._r.e=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_eh: function() { Z80._r.e=Z80._r.h; Z80._r.m=1; Z80._r.t=4; },
LDrr_el: function() { Z80._r.e=Z80._r.l; Z80._r.m=1; Z80._r.t=4; },
LDrr_ea: function() { Z80._r.e=Z80._r.a; Z80._r.m=1; Z80._r.t=4; },
LDrr_hb: function() { Z80._r.h=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_hc: function() { Z80._r.h=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_hd: function() { Z80._r.h=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_he: function() { Z80._r.h=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_hh: function() { Z80._r.h=Z80._r.h; Z80._r.m=1; Z80._r.t=4; },
LDrr_hl: function() { Z80._r.h=Z80._r.l; Z80._r.m=1; Z80._r.t=4; },
LDrr_ha: function() { Z80._r.h=Z80._r.a; Z80._r.m=1; Z80._r.t=4; },
LDrr_lb: function() { Z80._r.l=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_lc: function() { Z80._r.l=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_ld: function() { Z80._r.l=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_le: function() { Z80._r.l=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_lh: function() { Z80._r.l=Z80._r.h; Z80._r.m=1; Z80._r.t=4; },
LDrr_ll: function() { Z80._r.l=Z80._r.l; Z80._r.m=1; Z80._r.t=4; },
LDrr_la: function() { Z80._r.l=Z80._r.a; Z80._r.m=1; Z80._r.t=4; },
LDrr_ab: function() { Z80._r.a=Z80._r.b; Z80._r.m=1; Z80._r.t=4; },
LDrr_ac: function() { Z80._r.a=Z80._r.c; Z80._r.m=1; Z80._r.t=4; },
LDrr_ad: function() { Z80._r.a=Z80._r.d; Z80._r.m=1; Z80._r.t=4; },
LDrr_ae: function() { Z80._r.a=Z80._r.e; Z80._r.m=1; Z80._r.t=4; },
LDrr_ah: function() { Z80._r.a=Z80._r.h; Z80._r.m=1; <以上是关于Game boy模拟器：完整的 Z80 内核CPU源码的主要内容，如果未能解决你的问题，请参考以下文章