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Hi, A certain difference regarding the way the power adapter is recognised and how charging is monitored cannot be ruled out. Cannot imagine any major differences, though. BTW, used the M5159 and M5474 adapters for a quick startup test with a Duo 230 earlier today without a problem. Also had a...

Thank you for the update. It may be wise to be a bit careful about the status of the barrel. When I carried out a very quick resistance check between the barrel and the ring and sleeve for one adapter, the readings were relatively high. One should perhaps not automatically assume that the barrel...

Hello, You may want to have another look at my previous reply. As far as I can find out from information on the Internet, the tip of the pin would be unconnected, the (middle) ring would be ground (or -), and the sleeve (deep inside the barrel) would be + 24 V. The role of the barrel itself is...

The interesting part in this case would be the plug inside the barrel. This is similar to a 3.5 mm stereo headphone plug (it may even be possible to design some kind of DC cable adapter based upon that, modified and insulated in order to prevent short circuits). The tip of the plug does not...

Yes, removing the SCSI hard drive is probably the best way under these circumstances. However, I would not destroy the drive. Instead, keep it. You may find someone with a Macintosh LC II or III (or something similar) where the hard drive could be temporarily installed and erased. A disk tools...

At least according to the specifications in the user's guide, the DC input for the PowerCD base appears to be 7 to 11 V, 1.2 A. You may find that your power adapter has a DC output of something like 10 V. It is wise to verify the polarity of the plug; probably + centre (positive). If the...

Have you checked the label on the power adapter? According to the user's guide, there were five different adapters. Look for the exact AC input voltage (or voltage range) and frequency. Also, the exact DC output voltage and current (the adapter should provide a DC output voltage, which means...

Not the German version, but the following could perhaps be of some interest to you. https://68kmla.org/bb/index.php?threads/powerbook-150-boot-disk-and-general-questions.45315/page-2#post-525817

Additional information about virtual memory and RAM disk can be found via the System 7.5.3 help system (the question mark in the menu bar). You could enable balloon help (for example, when in the Memory control panel), or use the Macintosh Guide.

No, virtual memory (that is, "virtual RAM") uses the hard disk. It is supported by System 7.5.3. However, virtual memory will be slow. It may be faster if the "hard disk" were a CompactFlash card. A RAM disk makes use of real RAM. Therefore, you would need a sufficient amount of real RAM for...

See also: http://manuals.info.apple.com/Apple_Support_Area/Manuals/powerbooks/0305537APB150TI.PDF (1994) http://manuals.info.apple.com/Apple_Support_Area/Manuals/powerbooks/0307292APB150TI.PDF (1995) If you need a user's guide...

Yes, 8 MB extra would be 12 MB totally, which should be OK. The maximum total is 40 MB. The service manual for the PB 150 contains information about the RAM expansion card and the adapter.

Glad to hear that. Good work! You may need some extra RAM to begin with.

Just guessing here, but could it possibly have been a temporary power problem with the USB floppy drive while writing the disk images to floppies? I assume that you were making sector-copied disks via the Make A Copy button in Disk Copy 4.2. Sometimes, a USB floppy drive may require a powered...

You may also want to have a look at the web page http://www.knubbelmac.de/wie-geht/datenaustausch/datenaustausch-nullmodemkabel.html It has an outdated link to a "Nullmodemkabel" (you could try the Wayback Machine), but for DB-25 on the PC side. If necessary, adapters DB-25 to DB-9 are...

Hello, You will find the supported system versions here: https://support.apple.com/kb/SP145?locale=en_US Please note that the minimum version is 7.1.1 and a PowerBook 150 Enabler. Instead of using a normal set of system floppies, you could begin by creating just one bootable floppy with a...

Generally speaking, (most) modern sites are secure (https), and downloading anything is almost impossible using a Mac OS 9-compatible web browser. Just one example still using http would be the German knubbelmac.de. This should not be a problem if you keep all downloaded files in an encoded...