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rsolberg

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  1. rsolberg

    1.5 GHz G4 Mac Mini and OS9

    In GM-speak, these are called PCM (powertrain control module) and ICM. (ignition control module) These modules can and do fail, but the failure rates tend to be fairly low compared to other powertrain components. Based on some of the failure modes, capacitor failure certainly does occur. Typically, a mechanic will replace the PCM or ICM with a remanufactured unit. These modules are quite ruggedized as the ICM is almost always mounted in the engine bay near or under the coil packs and the PCM may or may not be in the engine bay. They're sealed and aren't designed to be serviceable at a garage, but parts suppliers take the broken unit back as a "core" and refurbish it, selling it as a reconditioned part. GM, along with other automakers have used similar technology since electronic fuel injection became standard on most models in the 1980s. Edit: Notably, the capacitors and other electronic components used in these modules will be automotive or industrial grade, thus have much longer expected usable lives than what you'd get in consumer electronics/computers.
  2. This post probably could have gone into Compact Macs or Peripherals, but programming EPROMs seems more hacky. I have a lovely Radius SE Accelerator (16MHz 68020 and 68881) in my SE FDHD and it's got ROM v 1.8 with a date of 1987. It works mostly okay, but I suspect the Radius ROM isn't totally compatible with System 6 or the SE FDHD's ROM. So far, any version of the Radius software I've tried fails. Older software seems to balk at System 6 and refuse to run, newer software tends to just crash spectacularly on load. Does anybody have or know where I can find the 3.0 ROM dumps for this card?
  3. I'd suggest booting into OS 9, making sure the backlight is set appropriately, then restart with the installer CD in the drive. Make sure to hold down the C key from before the chime until you get a Happy Mac icon or grey Apple logo. (depending on the OS X version) I wouldn't bother trying to use the Startup Disk control panel from within Mac OS 9, as I found it quite problematic on my Wallstreet. I find XPostFacto quite helpful as it includes a replacement for the Startup Disk control panel. Version 3.1 is good for 10.0 and 10.1, the latest version is for 10.2-10.4. https://eshop.macsales.com/OSXCenter/XPostFacto/Framework.cfm?page=XPostFacto.html
  4. rsolberg

    ADB Mouse Prevent Boot?

    I know the state of the mouse button is polled before boot up, as holding down the mouse button during power on will eject a floppy if there's one in the drive. I tried holding down all four buttons on my Kensington TurboMouse and powering on my SE FDHD. It stayed on the grey screen with no happy Mac, no question mark, etc for over 30 seconds until I released the buttons, then I briefly saw the happy Mac icon and it booted from the hard drive. If I didn't hold any buttons, I got the happy Mac and it booted almost immediately. If I held down only one button, there was a delay of about five seconds before boot. I wonder if your mouse button is stuck in after retrobriting.
  5. Below I've linked a helpful startup key guide that has saved me much frustration over the years. The Option key boot menu is a New World Mac ROM feature and your Wallstreet is Old World, so holding Option should just force booting to OS 9 from hard drive. On the Wallstreet, holding 'C' should tell the system to boot from CD during power on. If I have trouble with 'C' on an Old World machine, I'll usually try CMD+OPT+SHIFT+DELETE. http://davespicks.com/writing/programming/mackeys.html
  6. If I'm installing Mac OS/OS X from CD images, I've found that burning the install CD-Rs at 4x makes for much less frustration. The higher the CD write speed you use, typically the more error correction the CD-ROM drive has to do when you boot/read the disc. The disc may pass verification in your burning software, and may read fine on your modern burner, but on a "vintage" drive it will often read very slowly, freeze in the installer, display errors, or just fail to boot at all. Also, is the PRAM battery in the Wallstreet holding a charge? The weird backlight behaviour sounds like what I experienced. I had to boot back into Mac OS 9.2.2 in order to turn it back on. I think part of the classic Mac OS boot sequence makes sure the backlight is set to a non-zero value. If I did a warm reboot into the OS X installer, all was good. If I did a totally cold boot (dead/no battery, dead/no PRAM battery) after having the power cord unplugged, no backlight again.
  7. rsolberg

    Panasonic KXL-D745 CD-ROM Drive

    You'll need a DB-25M to HDI-50M (M=male) SCSI cable to connect it to your SE. Here's an example I found on eBay: https://www.ebay.com/itm/SCSI-Cable-HPDB50-to-DB25-6-ft-HD-50-to-DB-25-SCSI-2-to-SCSI-1-NEW/112543707132 I read the owner's manual for the drive and it can be used with SCSI equipped desktop computers. See here: https://manualmachine.com/panasonic/kxl-d745/1126527-user-manual/ You'll need to enable termination on the drive and set the SCSI ID to something unique on your SCSI chain. I've posted the pertinent dip switch settings from the manual below. The SCSI host controller in your Mac uses ID 7 and if you have an internal hard drive, it should be using ID 0. If you don't have any other SCSI devices, you can set the CD-ROM drive to 1, 2, 3, 4, 5, or 6. I like to use 3 or 4 for external optical drives for best compatibility with most of my systems. Software wise, you'll need to load a system extension in order to read discs. On the SE, my first choice would be CD Sunrise. It's available here, near the bottom of the page: https://vintageapple.org/macdrivers/disk.html Note that it only allows reading of HFS (Mac OS Standard) CDs, not ISO9660.
  8. I'm curious if anyone has or has seen a Quadra 605 PDS L2 cache module in real life. I'm not sure how common these things are. If anyone has one or has photos of one, I'm very interested in looking at the cache chips on the module to see what speed they are to determine if the module would function on a 33MHz bus. There's long been suggestion that this module *might* work on a LC 575 board, potentially making for an interesting CC Mystic upgrade: http://colourclassicfaq.com/mobo/mystic.shtml#Q2.1.10 Edit: also, I've read anecdotes about a LC PDS cache module as well as the Micromac CPU socket solution. I'm not sure if the PDS slot module references are misunderstandings due to the the CPU socket cache module physically blocking the PDS slot or if there is/was a PDS L2 cache module. In any case, I'm interested in learning about either module.
  9. rsolberg

    AppleCD SC - m2850

    It's worth double checking on your unit, but I checked images of the M2850 and the label on the 100-120v version I found shows 50/60Hz. This means you can use a step down transformer from the Australian 240v 50Hz mains. It's important to use a transformer rather than a converter. Converters tend to be smaller and cheaper, as well as being rated for higher wattages. (often 1600 watts) They work okay for hair dryers and other resistive loads, but not electronics. They use a triac to rapidly switch the mains on and off to achieve an average of 120v, but the triac doesn't work properly without a significant resistive load and its output is very noisy and potentially damaging. Ultimately, you may be able to modify the power supply in your drive by disabling a voltage doubler circuit (if it has one), but I'd suggest using it with a step down transformer at least to begin with. Here's an example on eBay Australia: https://www.ebay.com.au/itm/STEP-DOWN-TRANSFORMER-STEPDOWN-240V-110V-200Watt-Beige/132867110059
  10. rsolberg

    PowerBook-1400c-G3-333mhz-SONNET-CPU-MAX-RAM-MORE . . . $124

    Stack reduction? Sounds more like stack overflow!
  11. rsolberg

    Where to buy 60ns EDO RAM?

    As noted by itsvince725, the 440FX chipset doesn't have SDRAM support, so it needs EDO. The 440FX was used for the Pentium Pro/Socket 8 and early Pentium II/Slot 1 systems. In retrospect, it seems a rather weird regression from Pentium systems with SDRAM support to early PIIs without it. The 440LX chipset added SDRAM and AGP support. While the 440LX and later 440BX still supported EDO, SDRAM could offer twice the throughput and it seems rare to find EDO installed. The trade off is that those chipsets support less SDRAM than EDO: 512MB of SDRAM vs 1024MB of EDO. The EDO used by these systems is 3.3v and unbuffered and the DIMM slots are keyed to accept these as well as the more common 3.3v unbuffered SDRAM DIMMs Power Mac EDO DIMMs were 5v, buffered, and keyed differently to avoid mix-up. *The Power Mac 4400/7220 and many Mac clones used unbuffered 3.3v EDO DIMMs, more like PCs. I had a 440LX AT (not ATX!) system somewhere in the mid 2000s and I found it such an oddity. It had both AT and ATX power connectors, 2 DIMM slots for SDRAM or EDO, 4 SIMM slots for EDO, USB, onboard audio. Since it was AT, it only had an AT keyboard connector at the back edge. Everything else used headers. My guess is that boards like that were marketed to shops upgrading existing late 486 and Pentium PCs since they could use the existing case, power supply, and even RAM.
  12. rsolberg

    Color Classic and LC575

    It sure can. That's essentially the "Mystic" Colour Classic upgrade/mod. Before swapping the 575 board in, you can make a small modification to your System file with ResEdit so that it starts up in the right video mode for the CC's analog board/monitor. This won't affect booting with the stock CC board; it just changes the boot procedure when the 575 board is identified. See item 2.1.3 on this page for steps: http://www.colourclassicfaq.com/mobo/mystic.shtml When I did this, I remember booting from a floppy to replace the System file with the modified version, but I can't remember if that's strictly necessary. If you have a working 575 board and don't do the edit, I think you'll get a chime but no video.
  13. rsolberg

    what is this white stuff on board

    The product/goop I think you're looking at is often referred to as Silastic, Dow Chemical's trade name for the product. It's a elastomeric silicone rubber/polymer used both to secure heavy components and support components that stick out from the PCB considerably, such as large electrolytic capacitors. The product is used because it doesn't break down or melt, even with repeated thermal cycling. Importantly, it's inert, unlike common acid-curing household silicone sealants that will corrode PCB traces and component leads.
  14. rsolberg

    Insane SCSI to FW prices

    On the 512 byte block size optical drive topic, VAXStations also required it to boot. I wonder if this was a de facto standard among UNIX workstations of the era?
  15. Maybe this is technological masochism on my part, but one of my first experiments after BeOS would be to try Debian 8 (Jessie) on the Quad 604. The thought of something that modern on what's essentially a 20 year old high end workstation makes me giddy. Maybe NetBSD too........
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