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Interested in helping out
by Unknown on Nov 27, 2008 |
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----- Original Message -----
From: David Kessner davidk at f...>
To: cores at o...
Date: Mon, 27 Mar 2000 12:10:08 -0700
Subject: Re: [oc] Interested in helping out
(snip)
The 68K is not a good choice for a core. Especially a core
intended for an FPGA. Here's a couple of reasons why:
- Microcode ROM is very large. Too large for just about
any FPGA. (Assuming a 68020 or higher.) This was some years ago, so might not be true today. I was wondering about implementing a Sun3 in FPGA, such as the Spartan3E board. That would need a 68020 core. At current FPGA speeds, it would probably not need to be all that fast to compete with a real Sun3. Video would be optional, you can use a serial port. Ethernet would be nice, though. I believe the Sun3 uses an intel ethernet chip. Oh well. -- glen |
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Interested in helping out
by Unknown on Nov 28, 2008 |
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gah at egn2.com wrote:
----- Original Message -----
From: David Kessner davidk at f...>
The 68K is not a good choice for a core. Especially a core
intended for an FPGA. Here's a couple of reasons why:
- Microcode ROM is very large. Too large for just about
any FPGA. (Assuming a 68020 or higher.) This was some years ago, so might not be true today. There are two (free) 68k cores available that I'm aware of, plus a commercial core from Cast IIRC. The free cores aren't complete, but one of them is at least sufficient to implement an Amiga 500.
Video would be optional, you can use a serial port.
Video is trivial in an FPGA - text mode especially so.
Regards,
--
Mark McDougall, Engineer
Virtual Logic Pty Ltd, http://www.vl.com.au>
21-25 King St, Rockdale, 2216
Ph: +612-9599-3255 Fax: +612-9599-3266
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