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  1. 1200XL M.U.L.E.

    Maximizing memory on my Centris 650 - will this work?

    Hmmm! This all sounds very enticing! If I'm going to go down this rabbit hole then I want to go all in with four modules. Too bad the seller only has two and is listing this in British pounds. Here are two listings for 128MB modules. https://www.ebay.com/itm/304179340349?hash=item46d280643d...
  2. 1200XL M.U.L.E.

    Maximizing memory on my Centris 650 - will this work?

    Wow, that's a lot to unpack! Let me see if I understand this right. The Apple-approved, or stock limit, is using four 32MB modules, 4 * 32MB = 128MB. It is possible to use four 64MB modules, as long as they are in a dual bank configuration (vs. single bank, I assume?) and get even more memory...
  3. 1200XL M.U.L.E.

    Looking for a good benchmark program for my Centris 650.

    My Centris 650 is slowly coming together. Last night I got TattleTech 2.59 installed and I could see some specifications on my system. Nice! Now I want to test and benchmark those systems, especially RAM. Can anyone recommend a good benchmarking program that would run my Centris 650 through...
  4. 1200XL M.U.L.E.

    Maximizing memory on my Centris 650 - will this work?

    I'd like to max out the RAM in my Centris 650 before I button up the case. From a little bit of research on the internet, I am thinking of buying two of these to get 128MB. https://www.ebay.com/itm/155306584183 I want to max out the RAM because I want to run a RAM disk. It sounds like the...
  5. 1200XL M.U.L.E.

    When to use OS 7 and when to use OS 8 on my Centris 650?

    I enabled virtual memory from a control panel in OS 8.1. The panel would not allow me to enable anything less than 33MB of virtual memory. Doing so did bring down the memory allocated to the OS to 8MB. That was significant! @Paralel Is this CD available on the Macintosh Garden or Macintosh...
  6. 1200XL M.U.L.E.

    Mac ISO incompatible with Windows?

    I installed ImgBurn. The installation process asked me if I wanted to install other programs. I was starting to think I downloaded some kind of virus infested program. No, just another method of advertising, I suppose. Anyways ... it worked! 🥳 I was able to burn my downloaded image of...
  7. 1200XL M.U.L.E.

    Mac ISO incompatible with Windows?

    I tested my CD drive in my Centris 650 by playing an audio CD. It works! Now I want to try reading data from the drive. I have the OS 8.1 installation CD and I downloaded the ISO images of MS Office and ClarisWorks. These images seem to mount fine when I use the Basilisk II emulator. For some...
  8. 1200XL M.U.L.E.

    When to use OS 7 and when to use OS 8 on my Centris 650?

    RAM Doubler - yes, I think the original hard drive had that installed. Unfortunately, the hard drive crashed. :cry:
  9. 1200XL M.U.L.E.

    When to use OS 7 and when to use OS 8 on my Centris 650?

    @Byrd What percentage of my overall memory should I set to be virtual, in general? @Cory5412 Good suggestion on trying them all! :) Do you mean to burn CDs of the installed operating system or of the installation sources?
  10. 1200XL M.U.L.E.

    ZuluSCSI doesn't fit into my Centris 650 rear SCSI port

    Yes, mine has a male end - pins.
  11. 1200XL M.U.L.E.

    When to use OS 7 and when to use OS 8 on my Centris 650?

    Last night I installed OS 8.1 onto my ZuluSCSI. I didn't know what to install or not so I installed everything. Since this is all on SD card I can backup what I did and reinstall. Anyways, without having anything proper to compare to, the system feels kind of laggy. Maybe a better way to say is...
  12. 1200XL M.U.L.E.

    ZuluSCSI doesn't fit into my Centris 650 rear SCSI port

    "Gender benders" and cables. I ordered both from Amazon after my post last night. (y) If Rabbit Hole Computing couldn't design around this, then I wish they would have mentioned this in big and bold letters on their website. I would have bought a cable and one of those quasi "gender benders"...
  13. 1200XL M.U.L.E.

    ZuluSCSI doesn't fit into my Centris 650 rear SCSI port

    I received my ZuluSCSI today and tried using it with some images. It looks like it doesn't fit into the rear SCSI port. The underside of the resin case bumps into the surrounding plastic bezel. I remove the ZuluSCSI's case and was able to insert the board into the reard SCSI connector, but now...
  14. 1200XL M.U.L.E.

    Problem with Quadra 650

    I will double check my board when I come home tonight. The photo on my phone of the entire board is a little blurry because I'm zoomed out to capture it all. However, I can see that C39 and C40 have the same markings. Maybe this is consistent with the Quadra 650 as well?
  15. 1200XL M.U.L.E.

    When to use OS 7 and when to use OS 8 on my Centris 650?

    Neat! So, having one of everything is not out of the ordinary. Good to know! Good point on the memory footprint, @Phipli. I didn't think OS 8 could be a bit more bloated than OS 7 due to extra features and functionality. Sometimes we just want to boot up and go, right? Does OS 8 noticeably...
  16. 1200XL M.U.L.E.

    When to use OS 7 and when to use OS 8 on my Centris 650?

    My ZuluSCSI Mini is scheduled to arrive tomorrow. I understand I can run OS 7 and OS 8 on my Centris 650. Is there a guide or consensus on when to use each OS version? I was thinking of having an image of OS 7 and image for OS 8 and just toggling between them. Or, should I go with OS 8 since...
  17. 1200XL M.U.L.E.

    Centris 650 Won't Boot - "?"

    CD Drive - I was a little skeptical about my CD drive. The front had a white sticker on it that I removed and behind that sticker are opening for what look like a headphone jack, volume knob, and LED. None of those pieces are installed. I thought maybe they broke off. Tonight I removed the...
  18. 1200XL M.U.L.E.

    Centris 650 Won't Boot - "?"

    Thanks, @3lectr1cPPC ! Quick question on CD drives ... I think the ZuluSCSI emulates CD drives if I copy the ISO image file and rename it. Is that true? If yes, then how useful would a CD drive be? I imagine if I ever got any CDs then I could make ISO images on my Windows machine and copy...
  19. 1200XL M.U.L.E.

    Centris 650 Won't Boot - "?"

    Macintosh Garden - Wow, what a cool site! There is a literal ton of abandonware on that site! Thanks @joshc for mentioning it! I have some digging around to do. Floppy Drive - I threw caution into the wind and washed (not cleaned) the floppy drive with 91% alcohol. What came out resembled muddy...
  20. 1200XL M.U.L.E.

    Centris 650 Won't Boot - "?"

    @joshc I have been downloading images wherever Google finds them. Searching for "mac 68k boot disk" or "mac 68k disk image" helps. @Juror22 I partially disassembled the drive and cleaned the heads and rails.
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