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  1. Mk.558

    Help with identifying a capacitor on an Asanté MacCon

    The third-party cards, true, may have a different design philosophy but there's no reason for them to not use a much cheaper electrolytic if it serves the job just fine. A FWB JackHammer, for instance, is a high performance SCSI card with a nice stack of expensive SRAM on board and at least one...
  2. Mk.558

    Help with identifying a capacitor on an Asanté MacCon

    https://iequalscdvdt.com/index.html Someone linked that site here a month or two ago, and it's decent. Just flip through that and pick a few pages on the left side that interest you. It's not the best, but it was written by a human, unlike the "AI" sewage we have for content these days. But to...
  3. Mk.558

    Help with identifying a capacitor on an Asanté MacCon

    But tantalums are the best capacitor! says everybody I used Chemi-Con electrolytics for the recap of the IIci PSU, IIsi motherboard and PSU, SE/30 analog board and PSU. While electrolytics have their failure mode, and the usual ESR issues, realistically, they work fine enough and they don't...
  4. Mk.558

    System P-7.1 Bootable 800K Floppy Flop!

    Only one of them will be "blessed". The others will not and cannot be all blessed as well. Using System Picker is/was a common tool to swap between different boot folders.
  5. Mk.558

    Help with identifying a capacitor on an Asanté MacCon

    Grab a 20MHz oscillator for it while you're there, if you have not already replaced it.
  6. Mk.558

    System P-7.1 Bootable 800K Floppy Flop!

    Probably a difference in the boot blocks. Compare them back to back with something like BootConfigure or Fedit. Some or both of those applications may not work very well past System 6. Instructions for editing the boot blocks with Fedit is in the More Info section below.
  7. Mk.558

    Mac Plus, SE/30 Add external LED for "Activity"?

    Try to use clean links when possible. https://www.amazon.com/dp/B0F27W6ZR1/ The SCSI2SD does have pinouts. One of the more popular ones, the V5.2 has the holes for adding a 2-pin header for an activity light. Shown here is a V6, with the ZuluSCSI very much similar for this discussion...
  8. Mk.558

    Advice on Mac Portable selling?

    They really need an accelerator for them to be really useful. They're kind of like an SE/30 with a 8-bit color card: the speed hit is very noticeable. Worse, it doesn't run System 6.
  9. Mk.558

    Advice on Mac Portable selling?

    The scatter plot for good working Portables and not-working or troubled Portables would look very different. Statistically, having a rock solid one is going to be a much lower probability. Also survivorship bias, statistical anomalies and outliers probably fits in to your situation there Mr Fink.
  10. Mk.558

    Advice on Mac Portable selling?

    Portables weren't really on the desirable list until around 2012-2014ish. Before then you could get a Portable for a song, as they weren't on the hot list like the usual 840AV, SE/30, IIfx, 128K, the lot. After then Portables spiked in price, suddenly became quite desirable, and the forums got...
  11. Mk.558

    System 7.5.5 on Mac Plus and HD20

    It won't work. If you insert a 1.44MB disk in, it won't recognize the format, and will prompt for initialization. Of course there is some leeway with formatting a HD disk as DD, but it could work, but you'll be writing 800KiB format onto a HD disk, which has historically been sketchy. But you...
  12. Mk.558

    System 7.5.5 on Mac Plus and HD20

    yeah I don't even like 7.5.3 on my SE/30, I avoid running it. If anything, a stripped down version with OT for connecting to Tiger over AFP, but no other reason to run it. Don't even like it on the IIci. On a 68040, it's fine, but so is 7.1, and 7.1 boots faster anyways. On a PowerPC machine I...
  13. Mk.558

    System 7.5.5 on Mac Plus and HD20

    I suppose we might need some more specifics because I can't say I can reproduce the problem. I don't own a Mac Plus, or a SCSI CD-ROM drive. A BlueSCSI V2 should suffice though. Downloaded "SYSTEM_7-5-3-RETAIL.ISO (255.30 MB)" from Mac Garden. Download #2. Put on the BlueSCSI as CD40. Results...
  14. Mk.558

    Good & reasonable HDMI scaler: Extron RGB-HDMI 300(A)

    Settings for a Mac Plus -- wouldn't know where to start other than my earlier post. It's got some weird thing where it doesn't like to set the Input configuration, Active, V to 480. If I go one up on the dial to try to go to 480 instead of 479 (default) it zooms up to like 1148 or something. H...
  15. Mk.558

    Decent video capture for ~$30

    How are you using this setup? How does the output look like? I'm using an Extron RGB-300A, which is decent, and a Elgato HD60S. The Extron has to be configured to input 720x480p, which can also output back as 720x480p. It looks like this in OBS:
  16. Mk.558

    System 7.5.5 on Mac Plus and HD20

    I don't own a Mac Plus. However I'm very certain that 7.0, maybe not with the Disk Tools System build, but a Minimal install is probably OK, is all you need. To mount the CD-ROM, all you'd need is the Apple CD-ROM extension. Whether it can boot from it, I couldn't say for sure. It's a really...
  17. Mk.558

    System 7.5.5 on Mac Plus and HD20

    The Before you Install disk has a text file which tells us how to install the system software: While you can't put 7.5 on a 800K disk, you can put 7.0 on one. Presumably, you'd be installing a hard disk, which also means you could install it on a different machine and copy the whole thing over...
  18. Mk.558

    How do avoid Adrian's C10 replacement short 12V to data line 31?

    The reason why it says that warning is because there's a bunch of fine traces that run right along the C8 - C10 area, and they're kind of critical. When that image was created, about 11-ish years ago, there was a big rash of people getting a little clumsy with a soldering iron and raking the tip...
  19. Mk.558

    KEYSPAN USB to Serial adapter G3 PowerBook

    I don't consider it a bad adapter, but not a great one either. Instead, I'd advise you to use a generic RS232 adapter with a genuine FTDI chipset. Some thoughts are in the Serial Data Interlinks section in the link below.
  20. Mk.558

    Questions about 3D printing a reset/interrupt switch (AKA programmers button) for a Mac SE

    Well I already have it, so what to do? Acetone? It'll harm the color, but that doesn't matter on the inside. I'm sure they asked about the filament, but I have no idea of what filament is good for what (although, you could argue I could have searched, but then I can counter with SEO and AI...
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