Thanks for confirming that even the non-Sega emulators also got the BCD instructions wrong :-)
(even if only slightly)
By the way, BlastEm (and I think GPGX) now emulate these instructions correctly.
Not anymore . :) Thanks to your code I was able to spot the slight error in WinUAE, then the ...
Search found 2 matches
- Thu Jan 11, 2018 9:12 am
- Forum: Megadrive/Genesis
- Topic: Undefined behavior for ABCD and SBCD
- Replies: 36
- Views: 68167
- Tue Jan 09, 2018 12:52 am
- Forum: Megadrive/Genesis
- Topic: Undefined behavior for ABCD and SBCD
- Replies: 36
- Views: 68167
Re: Undefined behavior for ABCD and SBCD
Hi there,
a newcomer and non-Sega guy here. :) I found this super interesting thread, thanks for all the published code. It will help me a lot. However:
So, I decided to conduct my own investigation into this issue, and did some HW tests, patent investigation, and number crunching; and after ...
a newcomer and non-Sega guy here. :) I found this super interesting thread, thanks for all the published code. It will help me a lot. However:
So, I decided to conduct my own investigation into this issue, and did some HW tests, patent investigation, and number crunching; and after ...