Wiring harness

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MaxTek's picture
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The Smith family has a wiring harness on that auction site.

Is is a stock wiring harness or something they created for the PowerPC CC?

I am tired of my Color Classic 575 and want to go further with the mod.

Thanks.

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Dr. Webster's picture
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Looks like a custom harness t

Looks like a custom harness to me. The "Color Classic connector" is where the analog board plugs in.

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jt
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ATA + CCconnector = Hack . . .

. . . Looks like the frogeye setup to me. They've left out the SCSI/CD connections per that diagram, so if you're looking to make use of those eventually, rolling your own would be better. I'm no CC expert, but it looks like a good starting point.

jt

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MaxTek's picture
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frogeye?

Thanks both you for your replies...

What is a frogeye setup? And rolling my own..I guess that means make my own.

Just to clarify further, did they make this from the CC harness or does it look like they made it from a CC and 64xx/65xx series harness?

jt
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Read the CC FAQ . . .

. . . it's SOP for CCHacking and the "frogeye" diagram link there is the blueprint/pinout for doing the PowerCC harness hack. The ATA/IDE connector on the auction harness means it's from a Q630 or one of the desktop/AIO 68040 (6xx/580) or PPC variants/descendents (5xxx & 6xxx) of that line. Dunno if you can tell exactly which one from that piccie or not, but look it up and you'll see what I mean . . .

jt Wink

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MaxTek's picture
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I have a stock Color Classic

I have a stock Color Classic with keyboard and mouse in great condition and working condition. Anyone have the above wiring harness they would like to trade for the CC?

Thanks

MaxTek

eeun's picture
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Re: frogeye?

MaxTek wrote:

Just to clarify further, did they make this from the CC harness or does it look like they made it from a CC and 64xx/65xx series harness?

If it's got IDE, it's going to be from a 630 + above.

I've sent you a PM about the harness.

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Diego_Knyte's picture
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It looks like the harness for

It looks like the harness for a TAKKY mod.

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jt
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Harness Adapter PCB?

This is CERTAINLY not ready for prime time, but since the subject came up . . .

PowerLC575PCBs_00.pdf 227k

. . . the point of this excercise is the bottom of the three diagrams. The full range of lines on the 630 harness is on the left and the 575/CC AB connector is on the right. You can ignore the flareout of the signals, that's so I can use either 28 pin DIP jumpers on the sides or standard IDC header connectors on the middle two rows.

Whatever . . . I wanted to document the full range of available signals and design an adapter PCB to simplify doing a TAKKY harness adaptation without losing full function of either of the two harnesses involved. By chopping the cables in two and crimping on IDC goodies, the process becomes reversible and provides a breakout interface for turning a "TinyTrinitron" into a "crossover" KVM/Monitor rig that'll switch any which way.

If the inductive loading doesn't go bonkers, whatcha think of the concept? I haven't done all the troubleshooting yet, in fact, I think there's a major boo-boo in the pinout as depicted . . . or I already fixed it . . . dunno . . . don't remember . . . too many hacks in the "Illustrator" stage of the pipeline ATM!

jt Embarrassed

p.s. After the layout is finished and the connections are documented online, anybody should be able to do a perf-board/wire wrap version of this adapter, but I intend to etch, rout out or have a production run done of some PCBs.

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eeun's picture
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w00t!

Excellent work, jt! The diagram alone will be a huge asset to the CC crowd.Cool Mac

There ya go, MaxTek, just hold on 'til jt's got some boards made!

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jt
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Could be quite a while . . .

. . . I start my first "new job" in over 25 years next week. Review by, and advice from, the CC gang on this preliminary diagram might help speed things up a lil' bit though!

Advice on the ramifications of the cabling/header/connector/switchbox setup's electrical characteristics would be the most important stumbling block to be cleared up . . . as I see it at this point anyway.

Thanks for the support though, e!

jt Smile

edit: any input on the function of undocumented pins on any of the connectors would be MUCH appreciated!

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Tired already?

Curious to know why you're tired of your CC/575? Is it too slow? I'm just starting my 575 conversion now. Should I skip the 575 and go straight to the G3?

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Possible Reason(s)

Well, obviously I'm not MaxTek, so I can't comment on why he's tired of his 575.

But as the owner of a Mystic (575) CC and a couple of Takky (PPC) CCs, I would guess that he's just ready for a new challenge, and that the Mystic itself is probably still a great computer for him.

For this reason, I would recommend that you try a Mystic first.

This recommendation has nothing to do with the skill level required for each mod. Rather, I've found that a gradual, incremental approach to doing hacks can be more rewarding than going "right to the end," so to speak. It's fun to get in there and do a relatively quick hack, test it out, live with it for awhile, and then move on to another, possibly more involved hack, after a little while.

More than a few of the hacks at AF have multiple versions to them, or inspire other hacks, or are inspired by other hacks. It's all part of a process, and I think the doing is as much fun as the end result.

In the case of CCs, you can make a Mystic without doing the 640x480 VGA screen mod, but it's usually a good idea to do the VGA mod. I mention this because once you make a VGA Mystic, you can still turn that CC into a Takky later on. The only wasted expense is the 575 board, which shouldn't cost you any more than $20 shipped, and can often be found for free.

As I wrote above, I have two Takkys and only one Mystic. And my Mystic is a PowerMystic--I can switch between running it as a 66MHz PPC 601, or a 33MHz 68040.

Even with all that PPC power available in my CCs, I stil really enjoy running that Mystic in 68k mode. You should try it, at least for awhile.

That's my $.02 anyway. Others may have different perspectives.

Matt