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Notes: MacPLUS requires a diode in the logic board to supply 5V power to SCSI. Please give me a message if you need a diode. Diodes will be provided free of charge.

Blue SCSI is a small device for SCSI hard disks that uses an SD card. This product is a genuine product licensed by Eric Helgeson.


BlueSCSI is an open source, open hardware, and open design SCSI solution for vintage computers. It is built by the community of creators, not knockoffs or cloners. Please note that sellers who are not listed in the above link will be deleted above.


Introducing a new device in the Blue SCSI series that attaches directly to the back of your Mac. It operates on the 5V bus power of the SCSI 50pin, so no external power supply is required. When installed, it is more compact than the SCSI cable connector and has a very small depth of only 45mm. MacPlus has a sense of unity, and once set up, it doesn't get in the way of the installation location. (Requires diode mods to supply 5v on logic board)* Note: The designer Eric Helgeson wanted to make it as compact as possible, so he eliminated the ON / OFF jumper for the terminator. It has been reported that some Power Macs are difficult to start due to the presence of terminations, so they cannot be used. Operation is guaranteed only for 68K Mac.

Our Blue SCSI is manufactured under the same conditions as other distributors, the only difference is Made in Japan. Soldered by a craftsman who has been soldering for 30 years, inspections were performed three times after the program, after soldering the pin header, and after completion.


It is a reliable and reasonable method to solve the difficulty of obtaining used hard disks, which is a weak point of 68K Mac. It operates with low power consumption and can operate only with SCSI bus power. It is also recommended for models with insufficient current in expansion cards. The speed is faster than SCSI2 SD v5.1, and MacBench2 gives a score of about 180 when Quadra605 is 100 (* measured at LC475 68040 / 40MHz).


BlueSCSI is not a method like SCSI2SD, but uses a MicroSD card with the extension HDA disk image file. When backing up with the current PC, it is convenient because it can be handled as one file. A maximum of 7 volumes can be mounted on the disk image, but since SCSI-ID is assigned, it is assigned to a SCSI-recognizable ID (0 to 6 * Old Mac 7 is used by the SCSI bus controller and cannot be used).


Confirmed compatible models: SE/30, Classic, Classic II, IIci, Color Classic (II), LC I / II / III, LC 475, LC 575, Quadra 700, Quadra 800


Conditional operating model:

Plus (* 1), IIsi (* 1), SE (* 2)


* 1 External power supply required (via USB or FDD power supply 4-pin connection), PLUS can install a non-mounted diode on the logic board and supply 5V to the SCSI connector.

* 2 Incompatible chipsets are assembled in some lots.


In addition, it can be recognized / mounted by G4 of a machine equipped with a SCSI card. I don't feel it is necessary as a boot disk, but it is convenient for data migration from the current PC to 68K. Some models other than the above can be used and some are not. We guarantee only confirmed models.


Product Summary


Blue SCSI board and mounter set. The only other thing to prepare is a MicroSD card. Class 10 16GB is recommended. Format with exFat or FAT32 MBR, and after formatting, place the HDA format disk image file in the root directory of the SD card. At this time, the file name should be "HD50_512.hda". "HD" is recognized as a hard disk when viewed from Blue SCSI, the next "50" is the SCSI-ID at the beginning of the second digit, and any number from 0 to 6 is placed, and the first digit 0 is SCSI-LAN. -ID is usually set to 0. Next to the underscore, "512" is the sector size.

The completed file can be edited with an emulator such as Sheep Shaver. If the environment can start the installer on an actual Mac, the installation work will be done on a Mac.


Once started, LOG.txt can be created as the root, so you can follow up when an error occurs.

BlueSCSI V1.1A DB25, Fully Assembled with shell case

$55.00 通常価格
  • The product has been thoroughly inspected before shipping. Initial defects are guaranteed for 3 days upon arrival. We are not responsible for any malfunction or injury of the equipment used when using this product.
    No returns or refunds will be given. Please consider carefully before purchasing.

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