Today's project: Hack an Indivision into a CD32!

[redrumloa]

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 :-?

[Lorraine]

/

[tonyyeb]

Nah. The chip has too many components that are too close to it IMO.

[weirdami]

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 :-)

[redrumloa]

tonyyeb wrote:
Nah. The chip has too many components that are too close to it IMO.

[weirdami]

all those components just to scan double?

[alexh]

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?

[redrumloa]

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



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:

[alexh]

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?

[redrumloa]

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.

[alexh]

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)

;-)

[MaDDuck]

Well?


How did it go?

I checked the news, and no report of mushroom clouds in Florida!!

[redrumloa]

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.

[redrumloa]

@alexh

BTW, you may have missed some of my previous projects. I can have stupid patience soldering when I want to.



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!

[klx300r]

GO RED GO :pint:  :bow: