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BadGoldEagle

68000
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    1875
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About BadGoldEagle

  • Birthday 04/18/1996

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  • Website URL
    https://www.youtube.com/channel/UCXC7eF1qRzavpcrWPjtG2gA

Profile Information

  • Gender
    Male
  • Location
    Weissach, Germany
  • Interests
    Compact Macs and post 1998 Macs (PPC and Intel)

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  1. BadGoldEagle

    How to Install System 7 onto SD Card for SCSI2SD using BasiliskII?

    @HeartletTullius Blank image as in blank .img or .dsk 'hard disk' image. An image is basically a file that once opened (mounted) behaves just like a normal USB or SD card (i.e. a volume), you can then access its contents just as usual. So... First, open up Disk Utility, select your SD card and take a look at its capacity. You should be able to get its total size in 'bytes'. Copy that number somewhere. Then, open up Terminal, and use the following command to create your empty completely blank image: from: https://www.gryphel.com/c/minivmac/extras/blanks/ Additionally, you can download pre-made images but they're too small for what you want to do... Divide the number you got for your SD Card in Disk Utility by 512, and enter that number after 'count='. To be safe, I would remove a few bytes (about 200/300) from the number you got in disk utility. Warning: The maximum size your image can be depends on the type of mac you're going to install your scsi2sd in. - Standard 68k Mac (68000 - 68030) up to SSW 7.1: 2GB (can be mounted on ANY MAC with SCSI) - Standard 68k Mac (68000 - 68030) SSW 7.5 to 8.1: 4GB (can NOT be mounted on macs with 7.1 or earlier) - Quadra or PPC: 7.6 onwards: 2TB (CANNOT be mounted on 68030 Macs) source: https://68kmla.org/forums/index.php?/topic/27346-volume-size-limits-under-hfs-and-hfs/ Since you only want System 7, there's no need to dive into HFS+. Then mount your freshly created image in vMac/Basillisk/Sheepshaver... On startup it'll ask you to format the image. Once that's done, start installing System 7. @gobabushka I've never used HFV images but that should work.
  2. BadGoldEagle

    How to Install System 7 onto SD Card for SCSI2SD using BasiliskII?

    Basically, you need to find a blank image, use Basilisk to install Mac OS onto it (plenty of guides online on how to do that), and then use dd (terminal) to write it onto the previously set up SD card (standard procedure, use scsi2sd-util for that).
  3. BadGoldEagle

    Lapis ProColorServer 24 II and System 7.5

    A couple years ago, I got in touch with Lapis’ former CEO about their SE/30 color card. He told me they never got to publish 7.5 friendly drivers for any of their cards...
  4. BadGoldEagle

    Soft Power circuit and /PFW (Q950)

    I've had to find another workshop as the first one wasn't really interested. The second one I've found is great though. This guy services industrial grade PSUs but he's also a 'Funk' collector (ie radios, TVs, talkie walkies, CB etc.) and an Apple aficionado. He worked on a few Lisas and has a Powerbook 190. TBH, we chatted more about those than about the actual repair... If he can fix it, he'll even do a 24h stress test. I'll update you guys as soon as I hear from him.
  5. BadGoldEagle

    SE/30 Sony CR-44 PSU unstable voltage output

    Interested in the outcome of your research, Bolle... My SE/30 also has this issue but somehow it's worse. The wiggling occurs on about 1cm. Mind you, the Analog board is still 100% stock (PSU, LB recapped).
  6. BadGoldEagle

    Soft Power circuit and /PFW (Q950)

    Seems like I'm starting a monologue here... Anyway, the /PFW wire is indeed getting around 5V (4.4V in my case. FYI, the ATXs work by shorting the green Pwr_ON wire to ground, i.e. the other way round). The soft power circuitry must be using the 5V trickle line but the latter isn't directly connected to the /PFW line when the Mac turns on. It must rather be using the standard 5V line once powered on. I shorted the blue (5V trickle) and white (/PFW) wires and the power supply was able to start without it being connected to the logic board. So that's at least a good thing. This time, like an ATX, it doesn't need any load to power itself on. Plus when it's powered that way the PSU doesn't reset itself anymore, because all the other rails (-12V, +12V and 5V trickle) are working perfectly fine. However, I am getting absolutely nothing on the 5V rail. ZERO, NADA. Again, that's 'somewhat' good news, as I used to think the PSU was shutting itself off due to a serious problem (shorts etc...). As it turns out, it's just because the /PFW line isn't powered correctly. So the problem resides within the 5V rail. I'd say it's more capacitor related as I did wait about 20 hours since yesterday to test it again and it was still in the endless reset loop. But yesterday, after a few of weeks of rest, it worked fine for a while until I started loading it. If heat or a bad joint had been the culprit, it would have had plenty of time to cool down... But again, I only chose Nichicons and all of them were rated way higher than the originals. So IDK. Problem is nearly off my hands. I'll give the PSU to a professional (again, I don't have the time to troubleshoot more) and report back when it's done.
  7. BadGoldEagle

    Soft Power circuit and /PFW (Q950)

    Okay, interesting, so it doesn't like loads.
  8. BadGoldEagle

    Soft Power circuit and /PFW (Q950)

    Nevermind what I said above. This doesn't actually mean anything as the 'load' isn't purely resistive. If it had been 0 or really close to 0, then it would have been a problem. Knowing this, I felt pretty confident about plugging it in for yet another smoke test. And it booted right up. I don't usually curse (at least in my posts) but WTAF??? Last time it would simply refuse to do anything but click. The 5V rail used to power the logic board is fine and strong. It's been on for about 25 minutes now and nothing to report. I think it won't last long though. I think some component might not particularly like getting hot or one of the joints might still be bad... If only I had my hot air station around! I used it last month to reflow the joints on the 512k Hyperdrive's additional power supply. The joints looked sublime after a few minutes of heat. Now I'll try putting a higher load on it (HD, Graphics card and perhaps DOS card...).
  9. BadGoldEagle

    Soft Power circuit and /PFW (Q950)

    Well, today I got the multimeter out, and noticed that the entire 5V rail appears to be shorted to ground: there's only 26Ohms of resistance between the two and the multimeter in continuity mode beeps so that can't be good, right?
  10. Hi all To keep things short and simple, I am now in a situation that prevents me from devoting as much time to the hobby as I'd want to. Don't worry, I'll come back to it in a few months, my passion for Macs hasn't gone away at all. There's just more important 'life' things going on at the moment. I'll still be lurking on the site from time to time to see what's up but don't expect me to post a lot... Anyway, before I take that break I'd like to sort this Quadra thing out. I've found a workshop specialized in repairing custom and industrial PSUs. I haven't contacted them yet but given the amount of custom stuff they deal with, this PSU shouldn't cause them that much trouble. I tried to buy the proper schematic but the only source (Bomarc) has apparently disappeared... I'd like to make sure the PSU can be started without the board (I won't be sending them the whole unit). I got hold of the second edition of the 'Guide to Macintosh Family Hardware' reference manual. Pages 269 through 272 deal with the Soft Power circuitry used on the Mac IIs. Could one of you just please confirm that the following statement is correct before I plug it in for a quick test? I don't want to make things worse... If I want to power the PSU without connecting it to the board, connecting the 5V trickle power pin (#12, blue wire) to /PFW (#1, white wire) powers it on without any load needed (?). Thanks! Yours truly, BGE
  11. Makes sense. But 28A should be enough, right?
  12. Okay, I've done more research on PSUs. The original Quadra PSU outputs the following voltages: +5V Trickle 'Constinuous' @ 1.25A +5V 'Normal' @ 33A -12V @ 1A +12V (a) @ 5A +12V (b) @ 5A Modern PSUs can output most of the voltages above with a higher amperage, except for the 5V rail. This is most likely due to the fact that the standard molex connector has been phased out. The more molex connectors a PSU has, the more powerful the 5V rail tends to be. Your average brand new ATX PSU can provide up to 20A on the 5V rail, same thing with the industrial ones. To put things into perspective, even the AX1600i, Corsair's flagship 1600W PSU can't go past 30A. Geekdot's PSU must have been a couple years old already as it too can do 30A. I've checked with Seasonic and most of the other well known brands, and I couldn't find anything relatively new that does more than 28A. I think I'll go with the Corsair VX550, a 40 euro PSU on the second hand market that can do 5V @28A. It also has 6 molex connectors. I'll only need four. For the adapter board, I'd like it to handle a couple of things: 1/ Standard Molex to P4/64 Bit Power 4 Pin Square Molex conversion (DC side) 2/ Soft power (DC side) 3/ Monitor out power (AC 'hot' side) I'll start working on it right away.
  13. Great to hear that it works as expected. The more I think of it, the more I think that the 'locked' behaviour must be handled by the logicboard. It must send some sort of repetitive signal to the PSU to tell it to start up. The only thing I have left to do before kickoff is to select a proper new PSU. The VX450 has the fan on the top instead of on the side like the original PSU. That might cause a problem with cooling... I don't know how much the logic board draws but I doubt that'll cause the new PSU to overheat. The OG PSU was 303W, this Corsair is a 450W unit. I won't have to power 5 drives at the same time so I should be all right with my SCSI2SD and DOS card. The VX450 also does not have a 'monitor out' port, so I need to get a NO SPST relay to control that separately using the ATX's unused 3.3V rail. @GeekDot I unfortunately don't have an LCR-meter, and my multimeter does pretty much everything but inductors...
  14. BadGoldEagle

    Reinstall System 7 from scratch

    There’s no speaker connector on the classic II, just like the Plus it’s integrated in the main LB connector. Is sound working after boot up? You can check this with a system 6.0.8L (make sure there’s an L!) boot disk by navigating to the sounds control panel and adjusting the volume from there. I’m not sure system 7 lets you do that from an install floppy. If you don’t get anything from the built-in speaker, try the headphone jack. Also, you could ask the person who recapped it if sound was working on their end... could be an analog board issue... For the hard drive, I suggest creating a system 7 disk tools disk and a lido 7.5.6 disk. Lido is great for formatting or diagnosing if there’s an issue with the scsi bus or not. It won’t test the whole thing but you should be able to see if the problem is logic board related or hard drive related.
  15. BadGoldEagle

    SE/30 can't recognize SCSI HDD

    Given that you've tested many known good units (correctly terminated I assume since you're using them with other macs), I'm afraid the problem must be coming from the SE/30 board. Can you please post pictures of the top and bottom area around the SCSI chip?
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