The T80 is working just good. What I meant is, htat using the Mike's release did not change the behaviour of my project.<br><br>I managed to identify ad fix the problem, which was related to mixing latches with rising edge flip flops. (at seems this is what I think). I moved all Z80 bus inputs/outputs outside processes.<br>
<br>I have already updated opencores with the new files. It is working great.<br><br>Thanks<br><br><br><div class="gmail_quote">2008/5/14 H. Peter Anvin <<a href="mailto:hpa@zytor.com">hpa@zytor.com</a>>:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d"><a href="mailto:ronivon.costa@gmail.com" target="_blank">ronivon.costa@gmail.com</a> wrote:<br>
</div><div class="Ih2E3d"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Mike,<br>
I downloaded the the T80 from fpgaarcade.<br>
I had to use T80se instead of T80s (which is missing).<br>
Also, I tried T80_RegX instead of T80_Reg.<br>
<br>
The changes did not do any good. A sequence of commands "ld (hl),register" works just fine. If I put<br>
that in a loop, it fails (see first post, I posted a sample program<br>
there).<br>
<br>
It works fine for DE1. So, thinking again, it can't be a bug in the T80.<br>
</blockquote>
<br></div>
For what it's worth, I have a successful project using T80 at:<br>
<br>
<a href="http://www.abc80.org/%7Ehpa/fpga/" target="_blank">http://www.abc80.org/~hpa/fpga/</a><br>
<br>
I had to make a few changes to the T80 core to make it work.<br>
<br>
-hpa<br>
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