Help! Attempting SE/30 cpu socket to PowerCache pinout

[IamSpartacus]

(FYI you may have seen this on a mailing post recently)

To make a long story short, I have a Turbo 040, a socketed SE/30, and no adapter. What I DO have are some high-res photos of a IICX daystar adapter, which looks to be quite simple to replicate. My plan is to make a wire harness that mimics the IICX adapter, keeping the new CPU where the hard drive used to be (the HD is now a CF card, which frees up some room close to the CPU socket)

But the IICX adapter photos only got me so far. The connectors block some of the leads. Worse, every one of the card's resistors/capacitors lack visible leads on the outer faces of the board, so I have no idea where they connect to. Still, I've made some progress. This is what I have so far:

THIS PINOUT IS INCOMPLETE AND DEADLY TO YOUR MAC. DO NOT USE IT

http://hiddenkingdom.net/temp/Pinout.htm

The green pins have been mapped to the PowerCache. Yellow is an educated guess. As for the red pins, I have no idea where they map to, or if they're used at all. Again, none of the IICX adapter's resistors and capacitors have been accounted for.

One interesting observation about the PowerCache: it uses some of the cache slot pins that are dead ends on the IICI. These circuits are inactive when plugged into a IICI cache slot, but active when using a CPU socket adapter. Specifically the three Interrupt Pending Level pins are like this. This leads me to believe that a daystar adapter is incompatible with other companies' accelerators (micromac, sonnet, etc).

So yeah, I've gone as far as I can without having a IICX adapter to examine with a multimeter. Do any of you have a Daystar IICX adapter I can buy/borrow/barter for? There's one for sale on eBay, but the clown wants $470 for it (hilarious). This project is kinda up S creek without it.

 

[Trash80toHP_Mini]

When I got my set of LCII adapters, I also bought a IIcx Adapter . . . still have the box handy, but it's empty.

I've got a boatload of boxes to go through and lost s shipload of stuff in my storage room a while back, but I'll keep an eye out for the adapter

I think someone else has the socketed CPU adapter in the SE/30 and has posted about it recently.

 

[tt]

How about a IIvx adapter? I have one of those, I can probe that unit. It's probably electrically equivalent. I have tried it on my SE/30 once or twice to run a Turbo 040 or PowerCache. It worked fine, but it was difficult to hook-up since I had to make a temporary power connection on the back side of the motherboard with wires and a Molex connector. I think Trag also has one that he was doing similar experiments with.

 

[IamSpartacus]

Trash80 - do keep your eyes peeled for it.

tt - I'm finding conflicting information on the IIvx's pds slot. Some sites (including the daystar archive) say it doesn't need an adapter to use a turbo 040, which makes me think it has a Iici slot. Taken from http://lowendmac.com/daystar/pages/dsd_products/upgrades/030.040/t040spec.html:

System Requirements:
Adapter required for SE/30, II, IIx, IIcx*, and IIsi

None needed for IIci, IIvx, IIvi, and Performa 600

Are you sure what you have is a IIvx adapter?

 

[Trash80toHP_Mini]

SE/30 with Micron Xceed Grayscale & Socketed Daystar Acceler

send JDW a PM and see if he can help.

The PowerCache adapters are the "Rosetta Stone" of Apple's '030 PDS FUBAR strategy!

 

[tt]

OK, I was mistaken. Yes, it is a IIcx adapter. I have that adapter and it worked when I plugged it into the '030 SE/30 socket.

The main problem is that routing the connection would be very difficult. I am willing to help out on figuring out the connections. If we come up with a schematic, I am sure the collective minds here could come up with a nice solution.

If only we could replicate the '030 PowerCache board.

 

[Trash80toHP_Mini]

Are there any ICs on the IIx adapter? I don't remember. If there isn't any Conversion Logic to noodle out, then it's a straight PCB Layout, no schematic required. Can you take good pics of the board, or scans of the flat side, if there is one . . .

. . . ISTR the bottom side looks like a freakin' hedgehog! :lol:

I'd rather see effort spent on getting a G3 or G4 onto a card like the PowerCache, the IIci PPC Upgrade Card would be the place to start unraveling . . .

. . . the cobweb of specs for that particular hack! }

 

[tt]

There are no ICs, just capacitors and resistors. A schematic still would be helpful for CAD layout. If you search eBay right now, there is one with large photos to see.

It looks like the PCB has a dark layer obscuring the layout in between, so a high-res photo will not help for everything the OP is looking for.

 

[IamSpartacus]

I've seen photos of the IIx adapter. It has a pass-through socket for the original CPU and a single IC. The IC scared me off.

Now about this IIcx adapter. tt, you found the same images I used to make my incomplete pin map. If you're comfortable with it, I'd like to rent your IIcx adapter for pretty much what I'd pay to buy it (say $50?), map the pins (and verify them several times), and send it back unscathed. I'll use a multimeter and will not damage it in any way. I might even x-ray it just for kicks.

If you're not comfortable with that, I'd need you to check which pins each end of each capacitor maps to. Ditto for the resistors, making note of the measured resistance. For both the CPU socket and the cache slot. I'd also need you to see where the red pins in my diagram map to. It's going to be tedious. Either that or get it x-rayed in high detail and send photos.

In either case, once I have the pin map complete I'll do my best to illustrate it for everyone, and will use my SE/30 as a test subject.

 

[Trash80toHP_Mini]

If you've got an LCIII, have I got an adapter for you!!!! :lol:

I haven't found the IIcx Adapter, but I've got Version 1.0 of the:

Universal PowerCache Installation Manual for the Mac Color Classic, LCIII, and Performa 450

You should see all the chips on the CC Adapter! 8-o

The LCIII/P450 Adapter doesn't have any logic on it, just some resistors/assorted digital glue.

 

[tt]

Hmm, I need to mull it over. But in the meantime, I can take some high-res photos, post them, and poke around with a multimeter. I would like to see this info get disseminated to the community since I think it has the potential to make progress. I also have an x-ray image of a Daystar PowerCache. I am not sure if anyone would think it's interesting though.

 

[Trash80toHP_Mini]

You've GOT TO BE Kidding! Post it! :approve:

 

[IamSpartacus]

Trash80 - I do have an LC III, but right now I'm focused on the SE/30. Interesting that the LC III PDS doesn't need any ICs on the adapter, while the SE/30 PDS does...

 

[trag]

Daystar LC slot adapter:

No mention of the LCIII and P450, but perhaps this adapter was sold before those later models came out.

 

[Trash80toHP_Mini]

Yup that looks like the CC Adapter in my manual for the LCIII, trag.

Gotta do a couple of scans to post . . . }

NoPro on the Adapter, Charleton Heston, I was just offering. I'll assume you've tested your TurboCache in a IIci, correct?

 

[IamSpartacus]

I have one of those LC adapters. It does not fit in an LCIII, the shape of its extended PDS slot prevents one side from completely snapping into place

 

[Trash80toHP_Mini]

I'll post pics of my "L" shaped LCIII adapters and, hopefully, scans of the manual, maybe somebody can stitch it together as a .pdf from my .jpg files. It has pics of the Classic & SE Compatible Cards and the non-Classic & SE compatible Cards.

edit: done with the manual . . .

DAYSTAR Universal PowerCache installation manual

It's a LOT of pics to load, but they're not too bad on my 3g connection.

 

[tt]

I did some poking of the pins in yellow. Confirmed means the connections listed are correct and not confirmed means they are not connected.

Confirmed

H2 to A2

G13 to C25

H13 to C26

L3 to C1

H2 to A2

Not Confirmed

K1 to C27

G1 to C2

G12 to B23 (connection found at C12)

 

[IamSpartacus]

tt - NICE WORK! I've updated the pinout with your info. We've accounted for all 86 leads that go from the CPU to the daystar slot.

I've examined the capacitors on the various non-se/30 daystar adapters I own, and it looks like they're merely charge "buffers" intended to sustain +5v at all times. I'm going to assume the capacitors on the IIcx adapter do the same. If you can, scrutinize the 3 resistors close to the CPU socket next.

Once we figure out where the resistors connect, it's safe to assume the rest of the red pins aren't used