Always amazing to see that there was an "Apple" in the past beyond slim, not repairable and e-waste after use. The whole device looks well built and worth restoring. Thanks for sharing!

@Zeem4

Ай бұрын

*worth restoring

@ronny332

Ай бұрын

@@Zeem4 right 😀, non native englisch writer on non English keyboard with autocorrection enabled = chaos

@JanBeta

Ай бұрын

Yeah, "more civilized times" as Obi Wan would put it. :D

Great video, Jan. It's always a good thing to re-tin the traces that you scraped with a fiberglass pen, as they lose metal. Re-tinning protects the copper from corrosion and thickens the trace, helping it recover its original electrical conductivity (during manufacturing, traces are tinned before the solder mask is applied on top).

@RachelMant

Ай бұрын

Small correction: In *some* (but not most) PCB fabrication processes, they are tinned first (this is where the crinkly solder mask problems from a certain era of machines comes from), but most processes just see additional copper plated on during via fabrication and the solder mask applied after that followed by one of either ENIG or HASL processes to plate and protect the remaining exposed copper. The solder mask does the protecting of the copper for the rest of the board. This is why as Jan scraped the mask off with the brush, he exposed copper, not tin, first.

@JanBeta

Ай бұрын

Makes sense! I'm going to add some solder and then seal it off with some solder mask, I guess. Caps are already shipped so I'm hopefully going to be able to continue the journey pretty soon. :)

@adambaranek

Ай бұрын

@@JanBeta looking forward to the next one! What an interesting machine!!

Wow, I didn't realize the DOS Compatibility card fit into the 68040 CPU socket on these. I've worked on a bunch of other LC/Performa systems including the "regular" 630 and I assumed that the DOS board only connected to the LC PDS slot. As for the PDS (or Processor Direct Slot) it's a proprietary expansion slot that exposes the CPU bus (or a subset of it) to expansion cards. While NuBus was standardized, the PDS connector, compatibility, and specifications differed in a number of Mac families. The Mac SE introduced one version, the SE/30 and IIci a second one, the IIfx had its own. NuBus equipped Quadra models had yet another type. The Mac LC introduced the LC PDS slot, notably used for the Apple IIe cards, and important for marketing to schools with existing Apple II software. As the LC series evolved, Apple maintained backwards compatibility with the earlier LC PDS slot, eventually extending it to 32 bits as in your 630. It can be found in the 68k Performa, LC, Colour Classic, and LC-based Centris/Quadra models. Until PCI was introduced with the 6360, PowerPC Performa/LC models retained the LC PDS slot for backwards compatibility, though it was no longer directly tied to the CPU bus. On 68k machines, PDS was simpler to implement on the logic board than NuBus, and offered greater bandwidth, lower latency, but was typically limited to a single expansion card. PDS in general can be compared to VLB on 386/486 PCs.

@JanBeta

Ай бұрын

Ah, thanks for the clarification about the expansion slots. As I said, I'm certainly not an expert with that stuff and Apple changed things around quite a bit, it seems. :D

I'm glad you're putting the effort into repairing and restoring this Mac. Mostly because I wouldn't want to be the one to do it! But also because I agree that this could be an interesting machine.

This is such a cool machine! I bet Apple loyalists hated it back in the day, but now getting both a fast 68k Mac and a 486 DX2/66 in a single box? That is a retro enthusiast's wet dream.😄 I'm looking forward to part two and seeing this thing up and running!

@JanBeta

Ай бұрын

It definitely is quite amazing from today's perspective. Two full blown retro machines in one! :D I hope I get it to work!

It’s refreshing to see someone using an ESD strap while working on electronics. I know the usual arguments people use that “it doesn’t matter much”, etc. etc., but honestly a wrist strap is so little effort that everyone should use one. (Not to mention that ESD damage is often not obvious or immediate, so may not be discovered, why risk it?) It does my EE-retired-from-a-manufacturing-company heart good.

@JanBeta

Ай бұрын

Thanks! I learned my lesson regarding ESD damage after "zapping" a C64 SID chip a couple of years ago. Taking all the precautions that are feasible in a little lab like mine now (the work surface is grounded, too). :D

@chrisjones8741

Ай бұрын

@@JanBetahaha, yeah I blew out a couple radio modules and maybe other things before I learned my lesson 😅

This is going to be an interesting series of videos. I look forward to the next one.

@JanBeta

Ай бұрын

Thanks! The capacitors have already shipped so I am going to be able to continue the journey pretty soon, hopefully. :)

IDE drives were significantly slower throughput than SCSI until around when Apple switched to IDE, I believe that is the prime reason why the switch happened. Even after they switched to IDE internal drives, SCSI stayed as standard until the G3 new models as it was still used on a lot of Macs for scanners, etc.

@JanBeta

Ай бұрын

Makes sense! I guess the IDE drives were just a lot less expensive at the time. I was wondering why they had the SCSI still in there at all but as you point out there were quite a few things that connected to it in the Mac world!

Thanks for all the great content, Jan!

@JanBeta

Ай бұрын

Thank you so much! :D

I have the Houdini II card in my Quadra 950. It was from the 6100 Dos Compatible, which had an unique PPC 601 -> 68040 PDS slot adapter at a 90° angle, so I fitted it directly into the 040 PDS slot on the Quadra. The Houdini II has a DX2 and SoundBlaster 2 integrated, so it's like a perfect retro DOS gaming PC.

@JanBeta

Ай бұрын

I read about that. As far as I understand, the PC board in this is basically the same as the Houdini, just in a different form factor to make it fit this system.

Looking forward to episode the second.

Very nice! My wife and I had the Performa 637 & 638. They were identical except that my 638 included the TV tuner card. We were still skeptical about the new PowerPC Macs so we went for our old reliable Motorola 68K CPU. We were not in the least interested in any sort of PC compatibility, though we did try out VirtualPC when it came out. MacOS could already read and write PC-formatted floppies by then, and that's all the PC compatibility we needed. I understood the IDE hard drive was for cost savings. More popular and all that. The Performa 63X series was full of cost-cutting measures like that. We appreciated that they weren't as expensive as we were expecting. That's why we got two! Yes, we had 4MB of RAM, which was a nice upgrade from our old Macintosh IIsi which would only support 2MB. Our higher-numbered Performas had 350MB hard drives. This was indeed from the time when Apple was fully and truly doomed.

@JanBeta

Ай бұрын

Thanks for sharing! I guess the 637/638 were very similar to this 630? Apple seems to have built quite a few models using the same construction, even up to some PowerPCs. IDE drives certainly were less expensive than SCSI at the time. I was just wondering why they still had both SCSI and IDE in the machine. Probably because there were so many Mac specific peripherals that needed a SCSI connection.

@lorensims4846

Ай бұрын

Yes, the different model numbers specified different standard features. This is where the criticism that Apple had a confusing number of different Performa models came from. We didn't find it confusing at all. When we saw the Performa 638 at Circuit City we knew right away it was the consumer version (68C040) of the Quadra 630, but with such a high number, probably with all the bells and whistles. Actually mine was the Performa 638 CDV indicating that it not only included the CD drive but also had the TV Video card. From there we went down the road to the Best store where we found a Performa 637 CD for my wife, which was an identical model, but without the TV card. She wasn't interested in the TV card.

Cool machine, it's always fun to see these hybrid concepts.

@JanBeta

Ай бұрын

Yes, super interesting indeed! If I get this one running, I plan to set it up permanently. Saves space. ;)

Wonderful video. Great job Jan.

@JanBeta

Ай бұрын

Thank you!

For safe removal of components, it is best to use Wood or Rose alloy to reduce the melting point.Even DIP components are easily soldered out.

This video is going to be good for me, I'm just restoring mine :D

@JanBeta

Ай бұрын

Hope everything goes according to plan! (And I also hope the video is of some help!)

I have a later Performa 640CD Dos. I will have to recap it soon. First need to finish the analogue board on my Mac Classic.

@JanBeta

Ай бұрын

The 640 is probably VERY similar to the 630. Hope everything goes well!

When you pointed to the orange glue, my first thought was... Surely that glue is going to prevent the top of the caps from expanding when they fail. I thought that would be the common source of the exploding PSUs you mentioned. Then you pointed out where it could explode, oh! That tiny capacitor next to the thing that gets hot, I'm still trying to learn electronics jargon. How am i doing? It doesn't look like a cheap low end system with the number of daughter boards plugged into it. Although the modular system would allow for reuse of the mainboard in other systems, by mounting a 68040 directly in the central CPU socket. You pointed out the CPU was off to the side on this one and i didn't get how it worked until you lifted the 486/68K board out. They obviously have some logic on that board that enables the 486 to interface with the Mac hardware. This reminds me of the 8-bit BBC Micro's tube interface that allows a second CPU to run with it's own memory. Although this Apple version is very specific and has to include the host processor. The Amiga by contrast allowed expansion CPUs to replace the host processor, no dual processor operation. Unless it was a PC bridgeboard, though i don't have any experience of how they operated.

@JanBeta

Ай бұрын

The glue is just to prevent the caps from vibrating too much usually. The smaller sizes tend to leak more quickly in my experience so that wasn't a huge surprise. :) The separate boards must have been quite expensive indeed. I guess the "DOS Compatible" version must have been a bit more costly than the regular version of this machine. The bridge boards in the Amigas work quite similarly to this, they are basically a full PC on a card that runs independently from the main computer and the graphics output is tunneled through the Amiga graphics (unless you add a dedicated graphics card, which is a possibility on the Amiga because it offers some ISA slots for the bridge board).

An excellent model. The 6100/AV wasn’t bad either. It could accept a DOS card.

@JanBeta

Ай бұрын

Yes, I read about that! Very cool machine, too. (I actually think most vintage Macs are cool in one way or another but the PC compatibility is of course extra interesting.) :)

Yeeeeessss! I had a Performa 638 (still do I think, no idea where it is), complete with video capture. It's amazing to see you rip through this one! Keep going with the power supply. replace all the caps! I do this all the time with my Atari ST power supplies by default (it's an Exxos recommended fix).

@JanBeta

Ай бұрын

Nice! The 638 probably is very similar to this one. I ordered all the capacitors for the PSU. Definitely makes sense to do a full recap, seeing that the smaller caps already leaked quite violently. :)

You can't forget your name with that wrist band! :D

Awesome 🤩

@JanBeta

Ай бұрын

Thanks!

Kapton tape is heat resistant, not reflecting it. I think it is better to use some aluminium foil te deflect the heat back.

@thebyteattic

Ай бұрын

I agree. Kapton is heat-conductive, its utility is in spreading the heat, preventing it from concentrating in a single spot. Using kapton tape to attach aluminum foil is more protective, as the foil spreads the heat even more.

I will say, if I had this machine, I would put a full 68040 in, along with a 586 from either Cyrix or AMD in order to get a powerhouse of a Mac and a PC all in one

@JanBeta

Ай бұрын

Not sure if a 586 is going to work but a full 68040 is very possible, also slightly overclocking should not be a problem. Definitely lots of options for this system that I'm going to look into. If I can get it to work reliably in the first place, that is. :D

Sounds like you have your work cut out for you, Jan. It is not unusual in this kind of work to discover things that make you want to back up and take another path. This will be an interesting project to follow. Thanks for sharing with us! It sounds like you have some solder mask on hand, but if you don't you can also use nail polish for small repairs in a pinch.

@JanBeta

Ай бұрын

I have some UV curable solder mask that I'm going to use. Worked really well in previous projects. :)

Thanks!

@JanBeta

Ай бұрын

Hey, thank you so much! :D

NIce! I have a Perfoma 640 DOS that I have owned for many years, which I am guessing is similar to this one? So this is a great reference for when I will have to do the same and replace all the caps. Thanks for a great video.

@JanBeta

Ай бұрын

It should be very similar to this one, possibly even uses a variant of the same main board.

I'm looking forward to the second part. I own one of the plain LC 630 models of these. After I mentioned on a local Vintage Computer group that this was the first Mac model I used professionally someone sold theirs to me quite cheaply. It worked well for a few days - and I loaded a few different Mac OS versions on it. Then while I was using it it suddenly switched off. I couldn't get it to start up again ever again. I'm almost certain it was a PSU issue - but it's difficult to test these PSUs. They use a button press on the ADB keyboard to start up and so are hard to test when not connected to the machine. When I push the power button on the keyboard I hear a click and I see the fan turning for a split second and then it stops. Likely capacitors but it would be great to know if there is a way to test the PSU outside the machine. Also if there is some way to replace the PSU with some modern ATX supply that would fit - and how the power on circuit would work would also be interesting.

IDE was absolutely a cost-saving thing.

@JanBeta

Ай бұрын

I would have guessed so! I was just wondering why they had both SCSI and IDE in one machine. But probably the drives were a lot cheaper, too.

OMG my first Mac was a Performa 630CD. The college I taught at had one of those DOS compatible variants like the one in this video.

@JanBeta

Ай бұрын

Nice! The 630CD should be the exact same thing, except it lacked the PC expansion. Awesome machines!

Die PC kompatieblen Mac's kamen glaub ich kurz bevor Jobs zurück kam. Diese Maschinen waren auch das erste was er sofort abgeschafft hatte.

@JanBeta

Ай бұрын

Das kommt zeitlich auf jeden Fall hin. Sein Plan hat ja glücklicherweise funktioniert und es gibt immer noch Macs (auch wenn die natürlich mit den damaligen inzwischen eher wenig zu tun haben) und nicht nur IBM kompatible Rechner. :D

@_Matthias_0815

Ай бұрын

​​@@JanBeta Mal eine Frage. Was ist ein vernünftiger Preis um in einem Amiga 500, oder einem Amiga 1200 neue Kondensatoren installieren zu lassen?

@Ramdileo_sys

Ай бұрын

@@JanBeta Compatible with DOS..... Sound Blaster VIBRA... Yamaha OPL....... Okay okay.. but...... "will it run DOOM!"!??

I would replace the resistor with a higher wattage rating and raise it well above the capacitor to avoid heating it.

@JanBeta

Ай бұрын

That may be a good idea. I'm going to keep that in mind!

Adrian's Digital basement in his recent video had an adapter with a Socket 7 MMX 233 in mac. Fun stuff. Maybe you can find one of those adapters.

@JanBeta

Ай бұрын

As far as I've read there were quite a few different PC Cards/boards for different Mac generations. Not sure if the 233 board would fit into this one, the expansion slots vary a lot for different Mac generations, unfortunately.

@tigheklory

Ай бұрын

@@JanBeta This is actually a socket adapter. Although I think it was a Pentium 60/66 to socket 7 adapter. It was using the Apple card and someone just added the socket adapter.

IDE to CF card works as a good drive replacement. But it has to be the kind that can be set to bootable. I used a 4GB.

@JanBeta

Ай бұрын

Thanks! That is very good to know. I think I might have an adapter like that somewhere. Definitely going to look into that!

I have the LC version (with video card), and the power supply is completely different (Dynacomp DCF 704), so naturally I managed to order the wrong set of capacitors (d'oh!). But it still has the open top cage, and it still gives you a nasty belt if you accidentally brush against it. (ask me how I know, lol). But once it get's going it's a nice - if noisy - machine. Looking forward to seeing how the DOS card Perform(a)s...

@JanBeta

Ай бұрын

Nice! I'm going to be careful with that PSU. I really hope I can make this one work reliably and try out the DOS side of things. :D

Cool, I have one of these but without the "DOS compatible" feature sadly :(

@JanBeta

Ай бұрын

Still a very cool system! :)

Its such a kludge way of adding an x86 processor and sound card for a system that advertises this compatibility.

@JanBeta

Ай бұрын

It should be VERY compatible though. :D

Processor Direct Slot 😉 PDS slot.

@JanBeta

Ай бұрын

Ha! That makes sense! 😅

ActionRetro // MAC84 😀😉

I had a PowerMac in that case.

@JanBeta

Ай бұрын

Yes, Apple used the same case construction for quite a few systems!

That's strange, I remember Performa as having four digita, the Quadra line that went by 600 designations. Was this a European thing?

In the early part of the video still, but in KZread tradition I'm going to comment before finishing the video. 486DX66? Does this support a Pentium overdrive upgrade?

@erikreimann5556

Ай бұрын

Probably not

@JanBeta

Ай бұрын

Not sure! It might mess up the timings for the communication between the two systems. If I ever get my hands on such an upgrade, maybe worth a try. :)

It was a performa (the older slim version with the FDD only) that decided to delete months of school coursework (GCSE stuff, so the post-school, job-getting grades that people need!) for me, that was a fun time ending up with bad grades in one subject cos computer sez no, never trusted an apple device since then... :\

@JanBeta

Ай бұрын

Whoops. That sounds horrible. My experience with Apples (mostly from the time when I worked as an audio engineer) are quite the opposite. I had troubles with Windows (XP) more than once and Apple hardware always "just worked". I guess there's black sheep in both worlds. :/

I actually have a different variant of this, the Performa 636.

@JanBeta

Ай бұрын

Interesting! I think there were many variants of this system. There were a couple of PowerPC models that used the same case, too.

@fnjesusfreak

Ай бұрын

@@JanBeta Yeah, think they were called 6300

applying flux with the capacitors....time travel here we come!

@JanBeta

18 күн бұрын

Haha, nice. I never realized that hidden BttF reference even though I work with flux and capacitors quite frequently! 😅

Performa 630: $2000 on eBay now! Come on now, Jan, its a Q-tip!

@JanBeta

Ай бұрын

:D

IDE was cheaper to implement and the drives far cheaper than SCSI ones. In the 1990s the Mac ecosystem were I lived was extremely expensive, both computers and peripherals like disk drives. In 1994 l already was a computer nerd and nobody I knew used Macs. There was only one store selling them at eye watering prices. Not until the release of the G3 iMac in the late 1990s, which was also very overpriced, did they become more popular

@JanBeta

Ай бұрын

Makes sense! I guess Apple always asked "premium" prices for all their machines, even for the budget versions. :D

@glmm2001

Ай бұрын

@@JanBeta PCs were still quite expensive (I suppose the same happened in Germany), but Macs were extremely expensive in comparison to Intel desktops. Amigas were quite expensive too 😉

I hate those 630 machines...though they are small...but loud...on my machine the contact-pins for ground broke loose and made contact on the board itself while moving it in place...this killed the board...on my friends machine the power-supply blew up. I am using a 6100/66 with 486 Doscard instead. Much better machine.

Compatible with DOS..... Sound Blaster VIBRA... Yamaha OPL....... Okay okay.. but...... "will it run DOOM!"!??

@JanBeta

Ай бұрын

It totally will. In case I get it working at all, that is. :D

It’s not an easy job to recap an old computer and power supply. The general rule should be that, no matter how they look, replace all electrolytic capacitors. On the analog board/power supply and on the digital board/motherboard.

@JanBeta

Ай бұрын

I agree. Most electrolytic capacitors in these older systems are not going to survive for much longer. Even if they are still good I tend to replace them as preventative maintenance. In this case, it was clearly a good idea, looking at those leaky caps in the PSU.

Apple must have been really desperate

@daishi5571

Ай бұрын

Let me start by saying I'm no Apple fan, but during the mid 90's ended up working with them rather a lot as part of my job. The truth is they lost focus and were doing anything for a quick buck. Far too many models with little differences, allowing clones to be sold and (according to many Apple fans) selling out for trying to be a PC. There's a lot I don't like about Apple but seeing them fall apart like that was disappointing. Making a Mac DOS compatible, was seen as a betrayal and admittance that the PC was the correct way to go.