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chu-oh

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  1. chu-oh

    Serial cable issues

    Haha fair point! I'll try and wire up a new one and see how I go.
  2. chu-oh

    Serial cable issues

    Weirdly enough it was old/new stock labled as a Mac Plus serial adapter. But I'll check with the multimeter if the pins match up. Otherwise I'll fashion a new one. Cheers.
  3. chu-oh

    Serial cable issues

    I've been trying to get my Plus to talk to my iMac via Z-term, a serial cable a gender changer and a usb to serial adapter. But I can't for the life of me get them to talk to each other, I've got matching settings on both, the Belkin adapter's TX signal lights up when I send a string from the iMac end and the link light flashes on the Belkin adapter when the Plus sends something - but nothing appears on either end. Midi works fine on the Plus's modem port fine so I don't think there's any issue with the Plus, I've also tried 2 different usb adapters with and without the gender changer and no luck. I tested continuity on the cable with a multimeter and this is the only pin that doesn't get a signal, does that mean it's faulty? I've got a few Arduino Nano's floating around so I could probably fashion something with them and a Mini DIN-8 connector, but I'm not sure what the difference between simple RX/TX and the Serial Pin out:
  4. chu-oh

    2011 iMac

    And you lose display backlight with Windows 10 unless you flash to the Dell firmware.. which in turn doesn't work with MacOs. The DHCP tables don't match up (I believe because Apple doesn't use lvds like most laptops). I tried a 780m for a few weeks but as I still had a working 6750M that I reverted back to because it wasn't worth the effort. Though according to this thread a custom (paid) firmware may come out at some point: http://netkas.org/forum/index.php/topic,13815.30.html. This would solve all the issues boot screens, brightness control and bootcamp etc.
  5. chu-oh

    2011 iMac

    Great machine, I got one for $100 and I've added an ssd and 20gb of ram. Only problem is that the gpu's are prone to fail, you can replace them with nvidia cards but there's no EFI compatible firmware for them yet, so you don't get boot screen or brightness control.
  6. chu-oh

    J1 connector (Plus analog board)

    I wonder if you could dremel/cut the shielding off a male molex connector and use that?
  7. chu-oh

    SCS2SD - Mac Plus bootable solution

    I've seen a tutorial on how to do this before, but I can't find anything on the Google now either. Did find this from Techknight though: @techknight can you shed some further light on this?
  8. chu-oh

    SCS2SD - Mac Plus bootable solution

    Unfortunately the Plus doesn't provide termination power: https://support.apple.com/kb/TA44647?locale=en_US
  9. chu-oh

    SCS2SD - Mac Plus bootable solution

    Anybody know if it's possible to make a cable from one of the serial ports 5v pins to power the scsi2sd? http://www.applerepairmanuals.com/the_manuals_are_in_here/Ports_Pinouts.pdf
  10. chu-oh

    SCS2SD - Mac Plus bootable solution

    Good point, I just found this comparison of the scsi/floppy bus speeds: So I'm guessing the SCSI2SD is 4x the speed of a Floppy Emu. I don't have a Floppy Emu to test with but I'm guessing despite the speed difference the Floppy Emu is preferable on the Plus purely for the out of the box Apple HD 20 SC support and the need to not worrying about partition drivers etc.
  11. Here's an update to a previous thread of mine in relation to getting a SCSI2SD booting with the Plus. The Plus is notorious for having a flaky/early version of scsi that doesn't work as expected and as far as I can tell there is no other reports of it working with the SCSI2SD. So my previous attempts to make a bootable SCSI2SD drive with codesrc's tutorial (found here) on the Plus resulted in weird behaviour (clicking noises, resets etc). I found out through setting up the SCSI2SD as if it was a HD 20 (see this comment) and using an earlier unmodified version of the HD SC Setup (v7.1) I could install System 6.08/7.0 to the drive and boot from it. However this relies on access to either a way to easily make 800k disks, access to an original floppy with an early version of HD SC Setup or a floppy emu (in which case why would you bother with the SCSI2SD). So for perpetuity's sake I've copied the driver partition that HD SC Setup created - this can be used in lieu of the ludo.img mentioned in codesrc's tutorial. I've tested this with both the revision c rom and a Rominator (which I believe is based on the c revision), it would be great if someone with a Plus running an earlier rom version to give this a shot too. Apple_Driver.img
  12. chu-oh

    I have no logic!

    Here's a photo I took for my own reference of the correct placement of the Hi/Lo bios chips. Notice the different numbers on the chips: 342-0341-C for Hi 342-0342-B for Lo Once you know the bios chips are in the right order you'll be in a better place to troubleshoot what's happening.
  13. chu-oh

    I have no logic!

    I've got a spare Plus rom with the 3rd revision spare if you need? I got the last batch of the original Rominator's so I no longer need it.
  14. chu-oh

    Broken floppy drive

    Sounds like a broken gear, very common and pretty easy to fix. Give this a read: I got mine from eBay from a guy in Italy that sells them. If you're not fussed I believe you can remove the gear alltogether and just manually eject disks.
  15. chu-oh

    Zip Drive

    I use BasiliskII to mount my HFS formatted scsi2sd drive on Mojave. Should work the same with the zip drive: First I unmount the drive, then give my user account root access to the drive partition eg: sudo chown chu-oh /dev/disk2s2 then I add that drive as a volume in BasiliskII. BasiliskII allows you to mount folders on your mac as drives so you can drag and drop files to the HFS drive.
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