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# BlueSCSI 1.0-b to 1.0-c
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:toc: macro
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## Introduction
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1.0-c was a small change to fix an issue with machines that provide low or no `TERMPOWER` over the SCSI bus. If you recived a Fully Assembled BlueSCSI after April 1st, 2021 then this was done for you. If you have a kit labled 1.0-b you can make these modifications to become a 1.0-c.
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## Steps
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### Disconnect `TERMPOWER` from 220 Pull Up Jupmer
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Use a cutting tool to cut the small trace between the `TERMPOWR` and 220 Pull Up Jumper pictured below.
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Make sure continiutiy from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper.
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image::images/1.0-b-bodge-1.jpg[]
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### Connect 5V to 220 Pull Up Jupmer
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Now we will provide pull up from the 5v provided by the BluePill.
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image::images/1.0-b-bodge-2.png[]
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### Complete!
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Thats it! 5v to the Pull Up resistors will now work when powered externally.
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docs/MacHD.zip
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docs/MacHD.zip
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BlueSCSI Documentation © 2021 by Eric Helgeson is licensed under Attribution-NonCommercial 4.0 International
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# Assembly
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## Before you start
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Read through all instructions before starting.
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## Videos
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The community has created a few assembly videos:
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* [Stephen Arsenault - BlueSCSI Kit Assembly](https://www.youtube.com/watch?v=G6lwCfLQwd8) 2:52
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* [Joe's Computer Museum - A New Challenger - BlueSCSI - #MARCHintosh Review](https://www.youtube.com/watch?v=d_8VVmvvlNI) 26:52
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* [Geeky Bit - Tutorial - BlueSCSI Assembly](https://www.youtube.com/watch?v=-nF9FYFgVHM) 20:35
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## Building
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1. Solder on the surface mount SD Card holder. Use the [Drag Solder](https://youtu.be/Z_KL4fWOMug) technique.
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- Once on, check continuity of all connections. Fixing this after the BluePill is on will be difficult.
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- Ensure the SD card fits and you dont have too much solder on the sides or contacts
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2. Solder the diodes to the **bottom** of the board. Be sure they are flush as possible to the bottom.
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3. Solder the header pins on to the BluePill. Then BluePill pill to the BlueSCSI PCB.
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- Correct orientation is having the USB connector of the BluePill should be over the SD Card holder.
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- **NOTE**: Consider adding headers to the board if you would like to have the BluePill removable.
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4. Solder on the resistor nets. Pin one is marked on the board and the resistors.
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- 220 RNETS (`RN1` & `RN3`) are closest to the BluePill
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- **NOTE** PIN one on each - they are opposite of eachtoher. See photo.
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- 330 RNETS (`RN2` & `RN4`) are furthest from the BluePill
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- **NOTE** PIN one on each - they are opposite of eachtoher. See photo.
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5. Solder on the Termination Jumpers & place the jumpers on to enable Termiation
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6. Solder the 50 Pin headers on.
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1. Note Pin 1 and Box header on the silk screen.
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7. Optional - Solder on the berg connector. Only needed if your machine does not supply enough power via the SCSI bus.
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8. Optional - Solder on the debug headers near the SD card. Only nessissarry if re-programming.
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### Fully Assembled
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### Version 1.0-b & 1.0-c BOM
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#### Mouser Cart
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https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=c5cc83feff
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#### Parts
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STM32F103C8T6 (U1) aka BluePill board. Beware of fake/scams. Look for reviews. Amazon, ebay, etc.
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* 2x 330 (RN2, RN4) Resistor nets https://www.mouser.com/ProductDetail/652-4610X-1LF-330
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* 2x 220 (RN1, RN3) Resistor nets https://www.mouser.com/ProductDetail/652-4610X-1LF-220
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* 2x Diodes https://www.mouser.com/ProductDetail/583-1N5818-T
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* SD Card Holder (J1) https://www.mouser.com/ProductDetail/538-104031-0811
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* Headers https://www.mouser.com/ProductDetail/872-920-0011-01
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* 50 PIN SCSI header https://www.mouser.com/ProductDetail/517-30350-6002/
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- May substitute with 2 rows of headers from above.
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- **Note on Right angle connectors** - it appears Right angle headers are notched differently then the pin out. Be sure to note PIN 1/red stripe on the cable match up.
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### Optional
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Floppy/Berg Power header https://www.mouser.com/ProductDetail/571-1718254
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- Required if your machine does not supply power via TERM POWER. For example a Mac Plus or Mac with a Analog/PSU board that has not been recapped.
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# Build Your Own
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These instructions will guide you thorugh purchasing all of the parts needed to assemble kits for yourselves and for friends! Please note the hardware is licensed non-comercial.
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If you'd like to buy the kits pre-packaged/pre-flashed or fully assembled we have a network of makers here to help you out at https://scsi.blue
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## Order Parts
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Updated for 1.0-c.
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### PCB's
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Grab the latest Gerbers. Gerber files tell the PCB manufactuer how to create the BlueSCSI boards.
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https://github.com/erichelgeson/BlueSCSI/tree/main/hw/gerbers
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Order the boards from https://jlcpcb.com/ or your manufactuer of choice.
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### Components
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#### Version 1.0-b & 1.0-c BOM
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https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=c5cc83feff
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### BluePill
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Beware of fakes and buy from a place where returns are easy. Ensure the photo in the listing shows a chip that says STM32 on it.
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https://www.amazon.com/s?k=stm32f103c8t6
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https://www.ebay.com/sch/i.html?_nkw=stm32f103c8t6
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### STlinkV2
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You can usually find these bundled with the bluepill or at the same store you bought your bluepill.
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## Assemble
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Follow the guide on component orientation and assembly.
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https://github.com/erichelgeson/BlueSCSI/blob/main/docs/assembly.md
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## 3D Case
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Print or order a 3D case for your BlueSCSI to mount it inside your computer.
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https://github.com/erichelgeson/BlueSCSI/tree/main/3D-Files
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## Flash
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You will need to flash the BlueSCSI program onto your BluePill following these instructions.
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https://github.com/erichelgeson/BlueSCSI#flashing
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## Usage
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Be sure to follow the usage instructions for getting your drive images setup:
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https://github.com/erichelgeson/BlueSCSI#usage
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# Troubleshooting 1.0-b
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:toc: macro
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NOTE: If your BlueSCSI was shipped after April 3rd, 2021 please refer to the 1.0-c troubleshooting guide.
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## Green LED Flashes on and off
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This indicates BlueSCSI could not find any files on the SD card or communicate with the SD card.
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Ensure your files are named properly (case sensitive) following the naming convetion in the readme.
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If you recived a kit - verify all connections and that the outside of the SD holder is grounded.
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## LOG.txt is empty
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This indicates the BlueSCSI could communicate with the SD Card but found no files. Check your naming convention.
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## Slow performance
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Ensure you are using a good SD card. SD card quality can vary widely.
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Format your card as ExFat - users have seen quite a jump in performance.
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## (Kit Only) Verify you are not using a fake
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https://github.com/keirf/Greaseweazle/wiki/STM32-Fakes[How to tell if your STM32 is fake]
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