Bug fix on sbc, C was reversed, and result was not stored on V=0

2014-12-07 15:02:40 +09:00 · 2014-12-07 15:02:40 +09:00 · c3c8eafc07
parent 8ff302aaf0
commit c3c8eafc07
1 changed files with 2 additions and 1 deletions
--- a/6502.S
+++ b/6502.S
@ -605,7 +605,7 @@
  __se FLAG_N
 1:
  lsrs r1, r1, #17
-  bcc  1f
+  bcs  1f
  __se FLAG_C
 1:
  mov  r1, RA
@ -615,6 +615,7 @@
  lsrs r0, r0, #8
  bcc 1f
  __se FLAG_V
+1:
  mov  RA, r2
  adds PC, PC, #1
 .endm