Jump to content


  • Content Count

  • Joined

  • Last visited

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. register

    PowerBook 550c

    I would like to add to 6502's comment, that it is highly recpmmended to use an SSD or other Flash Memory to replace the primary hard disk drive in any (vintage or not so vintage) computer you would like to put into frequent use. Even a ten years old Macbook benefits so very much from fast mass storage, that it remains usable as an everyday computer for most tasks up till today. To get some inspiration, you might consider to look into the Wiki article SCSI hard disk replacement options. The PB5xx series has an internal IDE connector and also an SCSI host adapter. Using the IDE connector you are already halfways up the path to use a CF card instead of the original HDD. Other options are available. The Peripherals section of our forum is a valuable source. If you tried using flash memory in your Mac, please take a minute to share your experience in the Wiki chart on Flash drive test results.
  2. register

    Mac LC III 16mhz?

    The LCIII's clockspeed is set by some resistors soldered to the mainboard, similar to the LC475. The clockspeed is not set in the CPU itself. You may identify the clockspeed just by looking at the resistor setting. Many LCIII units with a regular 25 MHz CPU can be overclocked to 33 MHz easily by moving just one resistor, which is a popular upgrade path to the LCIII+.
  3. register

    PowerBook 180 no power (x2)

    I found the female power connector soldered to the 180's mainboard to easily cause a slack joint. It can be damaged by bending the contacts, the solder pads in the mainboard can become loose, and also the contacts may corrode from the 3 A uptake of the PowerBook. My first PowerBook was pulled from my knees by the cable and fell just onto the plug. Both the cable and the jack broke. I fixed the power adapter with a new cable and a new plug (a flexible rubber stage quality microphone cable is appropriate for this purpose, and you can choose from many colours), and also soldered a new jack onto the mainboard. That solved any power problems in this machine for quite a long time, until all of the batteries died.
  4. register

    PowerBook 550c

    Great thread, I really enjoyed the read. Thank you for sharing! Suggestion of an »earthly idea what application you could use for a modem in a Blackbird in this day and age«: Consider to use an address manager application (like »Address Manager« or »CoMa Mac«) that does not publish your contact data to the rest of the world. Just wire it to your phone line in parallel to your phone. The machine can dial for you and pick up the phone for you and also send / receive fax messages. Depending on te hardware it might even serve as an answering machine. A set of one time pads and a fax connection can also serve for strongly encrypted telecommunication (the one time pad encryption works with any media, of course, but a fax can be a nice tool for practising). The modem also enables the machine to set up direct network connections to other computers (think of ARA) or to dial into a BBS system. If you could please take some notes of which combination of CF memory card, adapter, system software and formatting software works and works not for you, consider also to publish your results (positive as well as negative finds) in our Wiki, like on the page Flash drive test results.
  5. The beige G3 mainboard has a slot for a video RAM expansion. You said there are intermittent issues with the video. You might check if the video RAM is o. K. If you have a working PCI video card in the system and if you encounter problems with the internal video circuittry, you might disable the internal video in the Open Firmware command line (hold ⌘+⌥+O+F upon start, immediately after the boot chime) with: setenv pci-probe-list fffbffff reset-all Then the output goes directly to the PCI video card, saving time, also. The changes take effect upon the restart and can be removed by a standard PRAM reset (hold ⌘+⌥+P+R upon start, immediately after the boot chime). On the beige G3 mainboard is also a CUDA reset button, as shown in the scheme in this article related to G3 startup problems. Once I found my beige G3 quite unresponsive after an attempt to just install the Dantz retrospect software. A PRAM reset did not take any effect. After some cheerless days with the machine playing possum I found the CUDA reset button to be a very helpful feature to revive the computer. Probably some infomation needed at boot time is messed up and needs to be restored to default parameters in your machine.
  6. Hello, thank you for your support! Currently I am waiting for the ordered short adapter to arrive. I will post any results after my next attempt to fix the machine.
  7. register

    Wiki/Pages article ideas

    Could we probably combine the creation of a »sticky« with the creation of a stub in the wiki which links to the stickie in the forums? As written before, the wiki is a pretty good tool to write an ecyclopedia. The wiki is made to ease a lot of tasks involved into collaborative care for information of the sort we use. I am not a wiki nor a forum software expert, but I like to occasionally debug some text or to contribute some finds or thoughts. Please consider to use the best of the forums and the wiki, and probably nudge the userbase towards sustainability of useful information
  8. O. K., now I have got the SATA-mSATA adaptor and stacked it with the IDE-SATA bridge adaptor in its factory set state of »cable select« mode. With this combination the Mac mini correctetly recognizes the mSATA SSD as device ID1 and the optical drive as device ID0. However, one problem solved, another arises: The set of mSATA SSD with attached adaptors will not fit into the fan frame / air duct which usually holds the HDD with a few screws you only can reach after the fan has been removed . The testing has been performed without the fan. Accordingly, the G4 will run only until the heat spreader becomes warm and the CPU exceeds the maximum allowed temperature. It will not overheat, but instead switch off iteself automatically. At least this behaviour leaves enough time to boot and check the system information on ATA attached devices. Everything is operational, still. Now I will wait for another, shorter mSATA-SATA adaptor to arrive. I will keep you informed on further progress.
  9. Dear fellows, I absolutely love you. I have enjoyed reading your illuminative treatise on possible implementations and uses of the 9200 chip in the Mini. Thank you!
  10. register

    Quantum ProDrive Rubber Replacement

    Consider to look for a piece of rubber tube of appropriate size, as used in a chemical laboratory, or fuel hose from a garage. O-ring seals are available in nearly any diameter and thickness. You could use a stack of O-ring seals. You may choose the size, specified as inside diameter x cross section diameter (thickness), and the hardness, specified as Shore hardness, to order rubber rings with desired properties. If available as square washers, the stack might resemble the original part even better. But make sure the rings will not escape from the shaft and distribute into other places of the drive mechanism. Also, you could cut the tubular piece from a solid block of rubber, or cast a piece from silicone rubber or polyurethane casting compound.
  11. Hi, thank you for your reply! The interconnect board appears to be a multilayer PCB with very tiny traces. The JAE KX14-50K11D connector from the interconnect board to the optical drive is surface mounted. I would have to disconnect pin 47 of the JAE connector to set the optical drive to ID1 (slave), as long as it is internally set to Cable Select mode. However, I would need a microscope to do the soldering and check for a proper result, which I do not have at hand. Also, the PCB in the optical drive itself is not that easily to access. Luckily, in one of my drawers I found an adapter from 44 pin IDE to SATA with soldering pads to appropriately code the IDE device ID of the bridge chip. Now I ordered a simple mechanical adaptor to connect the IDE-SATA bridge adaptor to the micro SATA SSD. I will try to swap the currently used IDE-mSATA bridge connector by the combo of a properly ID coded IDE-SATA adaptor plus SATA-mSATA adaptor. Results will be posted. P.S.: A very good compilation of basic information and pinout tables for the different flavours of IDE interfaces can be found in German language on Mike's webpages.
  12. I have put a small SATA SSD along with a SATA-IDE bridge adaptor inside a Mac mini G4. Now it does not recognize the optical drive sharing the same Mac's IDE host any more. Obviously the SATA-IDE bridge is not configured to properly support Cable Select to set Device ID1 (slave). In the Mac mini the optical drive is set to device ID0 (master), usually. Having the SSD set to appear as device ID0 (master) as well causes the system to ignore the optical drive. On the SATA-IDE bridge adaptor I cut everything that could connect the device ID setting input to ground (pin 28 of the IDE pins as well as pin33 of the JM20330 bridge chip). The device still works and still appears as device ID0 (master). The machine boots lightning fast, but the optical drive remains unusable. At this point I am stuck. Might it be appropriate to set the optical drive to device ID1 (slave)? Could somebody share information on how to appropriately hack the Mac mini's interconnect board that plugs both drives into the mainboard? Information on setting the optical drive itself from Cable Select mode to a fixed ID1 (slave) would be welcome, also.
  13. As long as you do not have appropriate software on the LCIII to receive files via the serial port, you might use a PC software to write to a 3.5" floppy disk. If your LCIII accepts and reads DOS formatted disks, it might work out of the box, as long as the Mac data has been appropriately contained into some file format without a resource fork. If your Mac does not read DOS formatted disks, look for a software that permits your PC to format and write Mac-like disks, for example MacDisk. Still the same applies as before: the Mac files must be contained or encoded in some kind of an archive file to save the resource fork data. Also consider to visit Chris Adam's webpage on connecting your Mac to a PC using the serial port. After you managed file transfer to get the necessary software onto your LCIII, get your copy of StarGate, as recommended above.
  14. Actually, it is possible to boot a Mac mini G4 into Mac OS 9. Might this permit use of appropriate Radeon driver software to run the Mac mini's Radeon 9200 chip in a dual display mode? If someone has this configuration (Mac mini with Mac OS 9 and ATI OS 9 Mac Software Update January 2005) up and running, could you be so kind and check this detail, please.
  15. Hello, I would like to connect two displays simultaneously to the same Mac mini, using a DVI to DVI + VGA Y-cable. The cable splits the DVI port into a DVI port (digital) and a VGA port (analogue). Actually, I want do this with an early Intel machine, but the same should work with the G4 incarnation of the Mac mini. I found a VGA monitor running perfectly in this setup, as long as the DVI connector is not used. As soon as a display is connected to the DVI output connector (digital on), the VGA monitor gets no signal any more (analogue off). Is there a procedure to invoke both displays at the same time? If yes, please be so kind and share your knowledge.