b6422516ec0af6bd7af3b9d502d682ca9ca6e3a5

prior implimentation of the bld insruction was ORing bit with T, rather than replacing.

bug find credit goes to: Shay Green <gblargg@gmail.com>

diff --git a/simavr/sim/sim_core.c b/simavr/sim/sim_core.c
index 03d46ffd6fe83e512a56451ecbf15a321897d419..2657a5efd28a8e7e32fea175a6f1196c6ea36d6e 100644 (file)
--- a/simavr/sim/sim_core.c
+++ b/simavr/sim/sim_core.c
@@ -1336,7 +1336,7 @@ avr_flashaddr_t avr_run_one(avr_t * avr)
                                case 0xf900: {  // BLD – Bit Store from T into a Bit in Register 1111 100r rrrr 0bbb
                                        uint8_t r = (opcode >> 4) & 0x1f; // register index
                                        uint8_t s = opcode & 7;
-                                       uint8_t v = avr->data[r] | (avr->sreg[S_T] ? (1 << s) : 0);
+                                       uint8_t v = (avr->data[r] & ~(1 << s)) | (avr->sreg[S_T] ? (1 << s) : 0);
                                        STATE("bld %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], 1 << s, v);
                                        _avr_set_r(avr, r, v);
                                }       break;