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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: redrumloa on December 13, 2008, 07:05:54 PM
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Burned out of eBay a little bit, taking a Saturday for something fun :-D Today's project? Hack an indivision to work in a CD32.
Think I can make it work :-?
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Nah. The chip has too many components that are too close to it IMO.
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tonyyeb wrote:
Nah. The chip has too many components that are too close to it IMO.
just need a steady hand and tiny soldering iron :-)
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tonyyeb wrote:
Nah. The chip has too many components that are too close to it IMO.
(http://i37.tinypic.com/o38l5.jpg)
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all those components just to scan double?
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What is that in the photo? A clip for a Lisa with two rows of inline pins? You took the crystal off the board (that's the component most likely to get in the way)
Bet ya that either A) you've got a short or B) you've got an unconnected pin.
The surface mount components on the left hand side are incredibly close to the Lisa chip reducing clearance and effectiveness of any clip.
If you've managed it... what next?
(http://img379.imageshack.us/img379/431/cd32motherboard41vc2.jpg)
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alexh wrote:
What is that in the photo? A clip for a Lisa with two rows of inline pins? You took the crystal off the board (that's the component most likely to get in the way)
Bet ya that either A) you've got a short or B) you've got an unconnected pin.
The surface mount components are incredibly close to the Lisa chip reducing clearance of the clip.
It fits, though I've moved the crystal to the bottom. I've also shaved the plastic of the connector in a couple spots to clear SMD resistors. I could have gotten fancy and relocated the resistors to this board, but why when this is just a hack? :-D
(http://i34.tinypic.com/2lnz8yt.jpg)
One of 2 things is going to happen.
1) I turn it on and it works like a charm the first time.
2) I screw something up and a small mushroom cloud comes from the CD32.
:lol:
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redrumloa wrote:
I could have gotten fancy and relocated the resistors to this board
Remove them from the PCB and solder 10's of wires from one side of the SMT placements to your PCB? Ooo not nice. Bound to introduce signal integrity problems. Not to mention analog stuff like impedance etc.
That's assuming that all those resistors are connected to pins on the Lisa.
Interesting... if this works and doesn't short what are you planning to do? Shave a real Indivision 1200's socket and moving the crystal away from that area perhaps out on wires?
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alexh wrote:
Interesting... if this works and doesn't short what are you planning to do? Shave a real Indivision 1200's socket and moving the crystal away from that area perhaps out on wires?
No, wire wrap. A lot of wire wrap.
The indivision will never mechanically work in the original confuration with an expansion like the SX32. It physically obstructs it and would not fit in the case.
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I say... by the end of this decade that we send a man to the moon and do the other things, like fit an indivision 1200 into a CD32 with SX32 Pro.
We do these things... not because they are easy... but because they are hard
(And so are we)
;-)
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Well????
How did it go?
I checked the news, and no report of mushroom clouds in Florida!!
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You guys crack me up! :roflmao:
After driving to 3 different Radio Shack stores I am unable to source any wire wrap locally :angry:
Soo... This complicates things a bit, I have to make my own wire wrap by separating individual wires out of some twisted pair ribbon cable I have on hand :crazy: We'll see how much patience I have tonight. I may shelve it until next weekend so I can order some proper wire wrap online.
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@alexh
BTW, you may have missed some of my previous projects. I can have stupid patience soldering when I want to.
(http://i30.tinypic.com/1o61i9.jpg)
That's an expansion port extension cable I made for my Commodore 128 Tower project. Now that one got me cursing :lol: It works, actually it works like a champ!
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GO RED GO :pint: :bow:
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How much room is there between the motherboard and the bottom of the case in a CD32? Enough room for a crystal by any chance?
If there is, or if you're willing to make a hole in the bottom of the case, mount it on the bottom of the board. Just flip it over, rotate it by 180 degrees, mount pins 7 & 8 into their regular holes and run a wire from pin 14 to the original pin 14 hole. You can just cut off pin 1 because it's not used.
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mongo wrote:
How much room is there between the motherboard and the bottom of the case in a CD32? Enough room for a crystal by any chance?
No, there isn't...
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Good luck. Sounds like a fun project. The CD32 is friggin cool. With the SX-1 and a CF card HD, 8 megs ram, a PC keyboard. Nice... The CD32 is like the only new old stock item showing up these days on ebay so I revisited this system.
Have all my games and whdload stuff on there. Cool to connect it to a modern HDTV TV. My HDTV has somekind of filter in there that makes the S-video output really really nice.
Used to have the video module too for playing Hong Kong Chop Socky flicks from mainland china as in Shenzen you could walk into a store with wall to wall VCD's for like 25 cents each.
Ok so I'm stoppoing at the A1200 and CD32, got em cheap. My collection is complete.
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WIP
(http://i33.tinypic.com/2a82naa.jpg)
About 1/4 done with the wiring. Done for today, maybe until my wire wrap order comes in next week. Slow going this way..
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Looks interesting. Hope the wiring doesn't mess up the signals too bad. What about a PCB that would go where your PCB starts, but is layed out with a new "chip plug" to the right in your picture but is rotates 90 degrees. Would the flickerfixer fit that way, with the longer arm pointing to the left in this picture instead of toward the expansion edge connector? OK, PCB layout may cost mroe and take a bit to receive, plus getting the "chip plug" as the opposite if the chip socket. But might helo clean things up if you get bad picture due to all those longer wires. I am interested to see how well your experiment goes though.
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i see. the cd32 has an edge connector like a1200 did. :oops:
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Different shape and pinout though... most of the signals are the same. You can build an A1200->CD32 adapter PCB
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alexh wrote:
Different shape and pinout though... most of the signals are the same. You can build an A1200->CD32 adapter PCB
I didn't know that. So, in theory with this adaptor PCB you could put a Blizzard PPC and/or Mediator busboard in a CD32 too?
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Can you not just build/buy a TALL socket extender,rather than all those long wires?
Put CD32 in new case or make filler pieces to go between original case top and bottom ?
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Lando wrote:
So, in theory with this adaptor PCB you could put a Blizzard PPC and/or Mediator busboard in a CD32 too?
Not IN the CD32 but sticking out the back. Sure. I only tried a RAM card and a 1230 but I imagine anything would work.
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recidivist wrote:
Can you not just build/buy a TALL socket extender,rather than all those long wires?
Put CD32 in new case or make filler pieces to go between original case top and bottom ?
Go any taller and you obstruct expansion hardware (ie SX32)
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Are you putting a cap thing on top of that chip or are you about to remove that chip and put it on that board?
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I say... by the end of this decade that we send a man to the moon and do the other things, like fit an indivision 1200 into a CD32 with SX32 Pro.
We do these things... not because they are easy... but because they are hard
And of course... because we can!
:-D
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OK red,
Now your next project is to be the PPC-32.
I suppose you had better use a slower chip as you are hand soldering and wire-wrapping.
Do try to have the prototype finished and tested by 1 Jan 2009 !The wise men will be placing their orders for production units a week later.
It occurs to me that the CD-32 is the ONLY TRUE AMIGA currently being sold on eBay daily.(Was there a huge warehouse in China full of them or do you suppose they are new production?) :-D
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A load of CD32s got stuck in the Far East when C= folded. The NTSC CD32s being sold on EBay are still a leftover from that stock AFAIK.
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Looks like 12 CD-32s have been sold on eBay from Dec 04 to Dec15;not a huge number but about one per day.Might be a few more as ebay sellers and search don't always use correct titles or include all international ebay auctions.
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Almost there...
(http://i40.tinypic.com/245lo5w.jpg)
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Wow... looking at this reminds me of a gal I once dated. Sort of hacked, but very pretty at the same time in a unique kind of way. lol
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Bzzzz.. first test is a big fat failure. I suspect wire length / cross talk is the primary issue.
(http://i41.tinypic.com/2yx5ces.jpg)
Some start up tests I actually get the Individual Computers splash screen, but it is somewhat garbled and the CD32 just sits there at it.
Gonna take some more work, but it is getting shelved for a while.
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Ouch. My indivision barely holds it together clipped on tight to my A1200, so I'm not surprise. A noble effort brother....
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if i did this project,i would have soldered a PCB on top of indivision let it strech over the chip with a socket.
useing two PCB solder together for connecting the links,this would also held the indivision in place.
there seems to be a lot of wires in this project,i would have check to to remove unnecessary wires that is not needed.
another way is to remove the socket on the indivision altogether and add a PCB via a jrop down links then go up again with a socket over the chip,again holding the indivision in place.
this project could have been connected without a single wire in view all connections would be on the PCB via solder links or with wires ( if any ) out of view.
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What if you moved the indivision to where the yellow pcb is now to reduce distance to the chip and then do some wires from newly centered indivision to where it used to be? It'd be different things being soldered so maybe crosstalk/wirelength won't matter.