z80: fixed bug in "add iy,sp"

2022-07-13 13:23:18 -05:00 · 2022-07-13 13:23:18 -05:00 · 3766576bae
parent e69a5d433d
commit 3766576bae
1 changed files with 1 additions and 1 deletions
--- a/src/common/cpu/ZilogZ80.ts
+++ b/src/common/cpu/ZilogZ80.ts
@ -1125,7 +1125,7 @@ let do_ix_add = function(operand)
   flags.H = (((ix & 0xfff) + (operand & 0xfff)) & 0x1000) ? 1 : 0;
   update_xy_flags((result & 0xff00) >>> 8);
   
-   ix = result;
+   ix = result & 0xffff;
 };