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Eric Helgeson 2022-05-08 20:04:06 -05:00
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Usage.md

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Hard Disk image files are placed in the root directory of a `ExFat` or `FAT32` formatted SD card. [`ExFat` is much faster](https://twitter.com/theory_retro/status/1376571371694723076). Use a premade or blank disk below.
Note: BlueSCSI images are compatible with the [RaSCSI](https://rascsi.com) and Basilisk II emulator.
The naming convention is as follows (file name max 32 characters). Note you may mount multiple images at a time to different SCSI ID's.
`HDxy_512.hda`
```
HD - Hard Disk
x - SCSI ID to attach to. 0-7 (though 7 on a Macintosh is the System)
y - LUN ID - Always set to 0.
512 - Sector size. Set to 512 if unsure. 256, 512, & 1024 supported.
```
### Video Tutorials
If you'd like a video walk through of these steps here are a few:
* [Getting your BlueSCSI working on your classic Mac is WAY easier than you think (Rons Computer Videos)](https://www.youtube.com/watch?v=szXAcwyee9g)
* [Tutorial - SD Card Prep BlueSCSI (GeekyBit)](https://youtu.be/WuXM1oGt8cE)
* [Tutorial - Blank Image BlueSCSI (GeekyBit)](https://youtu.be/2O-2HR9pJlI)
### Examples
`HD10_512.hda` - Hard Disk at SCSI ID 1, LUN 0, sector size of 512.
`HD50_512 System 6.0.8L LC.hda` - Hard Disk at SCSI ID 5, LUN 0, sector size of 512. Text between block size and .hda is ignored.
#### Bad
`HD99_712 foo bar fizz buzz bang.hda` Over 32 chars and invalid SCSI/LUN/Block size
If no image files are found PC13 will pulse on and off. Check the LOG.txt on the root of the SD card for any errors.
### Premade Images
Premade images are handy to just drop onto your SD card and go. Use [one of these methods](https://github.com/erichelgeson/BlueSCSI/wiki/Transferring-files-(Mac)) on your modern machine to transfer files & software from places like the [Macintosh Garden](https://macintoshgarden.org) to your vintage mac.
* A collection of blanks and premade images - https://mega.nz/folder/8hA3AQCJ#pWUq92L70yDXlogy9lk5Dg
* Premade for RaSCSI work on BlueSCSI too - Rename the files based on the Usage instructions above. - http://macintoshgarden.org/apps/rascsi-68kmla-edition
* A nice image that works with the Mac Plus with 1000 apps/games - https://archive.org/details/macpack-20210619
* Create your own custom disk images with [Disk Jockey](https://bluescsi.onegeekarmy.eu/diskjockey/)
### Custom Disk Images (Advanced)
This technique is useful when you would like a disk image larger than the pre-built images in the previous section.
The following instructions demonstrates the process using [dd](https://ss64.com/osx/dd.html) on a modern Mac:
1. Open terminal.
2. The following command will create a blank disk image. You can modify the command to suit your use.
* `dd if=/dev/zero of=example.hda bs=1m count=500`
* NOTE: On Linux systems, if you receive the error `dd: invalid number: '1m'`, you need to capitalize the 'm'.
* Example: `dd if=/dev/zero of=example.hda bs=1M count=500`
* The `count` field defines the number of megabytes (`bs=1m`) the total disk image should be.
* The output file from the command is "example.hda". This can be changed in the `of=example.hda` field.
3. Place the new blank disk image in the root directory of your SD card.
#### Format HFS for Macs
4. If you do not already have a tool to format SCSI drives, [download Apple HD SC Setup](https://macintoshgarden.org/apps/apple-hd-sc-setup-753-patch).
NOTE: You can use an emulator such as [Basilisk II](https://www.emaculation.com/doku.php/basiliskii_osx_setup) to move files to the image to prepare your installation, but not to format.
5. After booting into your target machine with the working Mac OS disk image on your BlueSCSI from step 3, format the blank disk.