Expansion board for the CD32

[plasmab]

Originally Posted by supaduper

In my#1645 post with pictures my clock is set to the two nearest the edge connector so thats a definite steve thats where my Hynix booted from

Yeah not working for me


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[kipper2k]

Originally Posted by plasmab

Yeah not working for me


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Hynix is good for me on the one that supaduper replied BOOM to
.
i built 3 and all good

[plasmab]

Originally Posted by kipper2k

Hynix is good for me on the one that supaduper replied BOOM to
.
i built 3 and all good

Hmmm. Maybe soldering fail.

Accidentally soldered an ISSI on backwards... £4 went up in smoke this evening

[solidcore]

R.I.P ISSI ram maybe it wasn't meant to be for her.

On a lighter note nice stream earlier - keep up the great work.

[FOL]

Originally Posted by plasmab

If it doesnt work with a riser then the riser has shorted something or disconnected something. Is there a schematic for that riser?

We have a load of floppy drives here, so will try once I get mine built.

[solidcore]

Perhaps the floppy riser has some different wiring or lack of wiring as it's specifically made for the floppy and RTC? Just my 2 white matter cells pounding away together speculating.

However we can confirm that a modified version of Stevens cd32 riser board in his github actually works, but in the modified version it appears the 5v/12v lanes are a thicker width, and no idea if the tracks are routed differently or not. I have the French version from Mark to test until mine come so I'll inspect the differences and get back to everyone about that shortly.

[alexh]

Originally Posted by FOL

We have a load of floppy drives here, so will try once I get mine built.

NOTE: alenppc is talking about the FWSi CD32 floppy drive which is also a CD32 expansion riser being sold by Analogic

No schematics are available. It is possible this riser doesn't include enough signalling to use a tf328 as it was only previously used with an RTC expansion.

Although it looks very populated. Far more than just the signals required for the RTC.

[FOL]

Originally Posted by alexh

NOTE: alenppc is talking about the FWSi CD32 floppy drive which is also a CD32 expansion riser being sold by Analogic

Thats the one Im talking about too, .

[solidcore]

Yep it's the one I held off on buying. I was told to buy . they go for 129 or so on ebay, the problem is IF the riser board isn't passing the 5v/12v's,grounds,or signals for other pins through the RTC clock expansion port then it's likely it wont work as intended by Plasmab which I think he said Stedy smoked him a kipper. Also perhaps the Floppy is having a fit with the tf328 installed, try disconnecting her so it's just a riser board not a riser+floppy?

solutions I can think of
1) $: If you want a quick and dirty solution fire up eagle, modify Plasmab's cd32 on the 5v/12v and gnds wack the traces up from 6 or so to 12/14... and then slap it on dirtypcb, buy a few dozen edge connectors on digikey or mouser or more expensively arrow.
2) OR $: wait for some kippers to go into stock. (I haven't looked for any in a while now)
3) OR $: I have some coming from china, (passive type , no rgb etc) ill build them test them and update accordingly as and when I have any for sale.
4) OR DIY : take a look at the eagle .brb file from plsamab and follow your traces on the riser, if some are missing, solder wires between the two points .

[alexh]

Originally Posted by solidcore

Yep it's the one I held off on buying. I was told to buy.

You were told it was the only one on sale and it was untested with tf328.

Originally Posted by solidcore

If the riser board isn't passing the 5v/12v's,grounds,or signals for other pins through the RTC clock expansion port then it's likely it wont work as intended by Plasmab

Erm obvious. You can see from the photos that the riser has considerably more signalling than only what is required for an RTC.

I'm curious to know who reported it to alenppc as "not working". They didn't post here or Amibay or Amiga.org etc.

Originally Posted by solidcore

I think plasmab said Stedy smoked him a kipper.

What does that mean?

Originally Posted by solidcore

Also perhaps the Floppy is having a fit with the tf328 installed, try disconnecting her so it's just a riser board not a riser+floppy?

You can't. The floppy controller etc. is part of the Riser. Look at the photos.

[AJCopland]

I have one of those (Fwsi/Analogic units) and I've used a multi-meter to check the connectors before, it's somewhere on this forum.

If I remember correctly it's nearly 1:1 between the connectors so all of the signals were present.

Tomorrow is the earliest I could test it as a board has arrived from supaduper, which is awesome work by the - much better than I can do!

EDIT: found it http://eab.abime.net/showpost.php?p=...&postcount=182

[alenppc]

Originally Posted by AJCopland

I have one of those (Fwsi/Analogic units) and I've used a multi-meter to check the connectors before, it's somewhere on this forum.

If I remember correctly it's nearly 1:1 between the connectors so all of the signals were present.

Tomorrow is the earliest I could test it as a board has arrived from supaduper, which is awesome work by the - much better than I can do!

EDIT: found it http://eab.abime.net/showpost.php?p=...&postcount=182

Please let us know what you find out.

[plasmab]

Originally Posted by FOL

Thats the one Im talking about too, .

I would bet that PUNT isn't being passed though and is routed to something critical on the riser itself. Either that or it is being held high or low by the logic on the board and doesn't go high impedance when not selected. Easy mistake to make. Easily checked


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[alexh]

Originally Posted by plasmab

I would bet that PUNT isn't being passed though and is routed to something critical on the riser itself.

AJ Copeland has said which pin is not connected straight through in the post he linked above.

Originally Posted by AJCopland

the 13th pin from the left on the top row

If I am reading the schematic correctly this is pin 158. "CCK_B".

[plasmab]

Originally Posted by AJCopland

I have one of those (Fwsi/Analogic units) and I've used a multi-meter to check the connectors before, it's somewhere on this forum.



If I remember correctly it's nearly 1:1 between the connectors so all of the signals were present.



Tomorrow is the earliest I could test it as a board has arrived from supaduper, which is awesome work by the - much better than I can do!



EDIT: found it http://eab.abime.net/showpost.php?p=...&postcount=182

Try and boot it with DiagROM too. If it does boot try the autoconfig routines under Memory section... if that hangs see if you can measure PUNT.


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[plasmab]

Originally Posted by alexh

If I am reading the schematic correctly this is pin 158. "CCK_B".

Unused in the TF328.

My bet is that the Analogic riser uses PUNT to map out access to the built in CIAs. I futher bet that it doesnt "float" when not in use. Its not expecting add on cards to need to map out memory access with PUNT. Unfortunately I need to do that with the IDE emulation.

If the Analogic card pulls PUNT high when the TF328 tries to push it low then the logic level will never go low and the TF328 will not be seen.

The symptoms would be no card found. Is that what we're seeing?

EDIT: possibly might interfere with RAM timing enough to cause the card to appear defective to.

EDIT2: Way to test this theory is to watch the TF328 try and boot while watching PUNT on a scope.

EDIT3: PUNT = /OVR for the CD32

[alenppc]

Originally Posted by plasmab

The symptoms would be no card found. Is that what we're seeing?

Exactly.

[plasmab]

You may get ram but will definitely not get IDE.

Sounds like a theory worth checking out.

I can give out a CPLD Jed that will hold PUNT low. You can then measure it. If it's sitting at 2.7V then my theory is correct.

If that's the case these risers are useless

[alexh]

Originally Posted by plasmab

If that's the case these risers are useless

Without modification? Why would the riser need PUNT (/OVR)?

[alenppc]

I don't have this riser, it's somebody I sent the card to, the card works fine with Kipper's riser, but is not detected on Analogic. Let's see if AJCopland can confirm.