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Offline alexh

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Re: minimig 4000
« Reply #59 from previous page: November 25, 2007, 09:13:06 AM »
Quote

AeroMan wrote:
I'm not stating that we should ignore what was done in Verilog and try to rewrite everything in VHDL. It was just one comment from them I would like to share.

Sure, but the comment is invalid.

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AeroMan wrote:
Actually, one of them is PHD... What they told me in that discussion is that there are some stuff that you can implement in VHDL easier than in Verilog

Not true. Trust me I've worked as a Verilog and VHDL designer for over 10 years. Ask them to name something, just out of curiosity.

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AeroMan wrote:
but it is more difficult to learn.

It depends. If you've never done C (software) then you'll find both equally difficult. If you've done any C then you'll probably favour verilog as its syntax is quite similar.

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AeroMan wrote:
as Assembly and C are also languages and althrough C is very powerful, there are things that can't be done using it. You can do everything in Assembly, but it is way more difficult.

Nice simile. Unfortunately not a valid one. C is a high level language and Assembler is a low level language. VHDL and Verilog are both equally high level languages.

Verilog has pro's and cons, VHDL has pro's and cons. The majority are not valid for MiniMig as they centre on verification and code reuse.

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AeroMan wrote:
With the 60% number that AJCopland said below, I can tell the hardware needs prevision for a second FPGA or a bigger one.

No you cant, cos you dont know how more complex AGA is over ECS. Dont try to tell me you do, cos you dont :-P

The only thing you could work out is if we had enough I/O for 32-bit CPU/RAM interface and 24-bit video interface.
 

Offline freqmax

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Re: minimig 4000
« Reply #60 on: November 25, 2007, 10:38:05 AM »
What's the status of the Softcore MC68000 eg Suska, and opencore.org ..?
Does it work long enough to at least show workbench screen?

If it works good enough. Then we have a starting point for a build that don't require massive parallel pcb traces.
(Obviously the DE2 build has something going)

Then there's the mc68060 softcore.. :-D
 

Offline AJCopland

Re: minimig 4000
« Reply #61 on: November 25, 2007, 04:10:25 PM »
Quote

downix wrote:
92, but I wasn't using "pins" but a card-edge.

If you don't mind me asking what kind of connector are you using? One of the MCA style edge connectors like the ones on the CD32 or one that matches the original A500 more closely?

I was thinking that if you're making a connector design then it's not going to be readily usable by the old A500 expansions due to the 3.3v and 5v issues. So why not make it using a more common and easy to source connector type?

Andy
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Offline downix

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Re: minimig 4000
« Reply #62 on: November 25, 2007, 04:14:03 PM »
Quote

AJCopland wrote:
Quote

downix wrote:
92, but I wasn't using "pins" but a card-edge.

If you don't mind me asking what kind of connector are you using? One of the MCA style edge connectors like the ones on the CD32 or one that matches the original A500 more closely?

I was thinking that if you're making a connector design then it's not going to be readily usable by the old A500 expansions due to the 3.3v and 5v issues. So why not make it using a more common and easy to source connector type?

Andy

I have been considering just this.  The slot is 3.3v, but my thinking was to also make an adaptor to turn it into a 5v A500-slot clone.  But first things first, need to find something of at least 92-pins for a connector.  (I need it a lot smaller than the A500's slot to work)
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Offline freqmax

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Re: minimig 4000
« Reply #63 on: November 25, 2007, 05:10:03 PM »
Some developer boards (Digilent) use "Hirose FX2" connectors I think. These could be used?
 

Offline downix

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Re: minimig 4000
« Reply #64 on: November 25, 2007, 05:33:00 PM »
Quote

freqmax wrote:
Some developer boards (Digilent) use "Hirose FX2" connectors I think. These could be used?

They could, yes.  TYVM
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