mirror of
https://github.com/erichelgeson/BlueSCSI.git
synced 2024-12-23 04:29:44 +00:00
28 lines
888 B
Plaintext
28 lines
888 B
Plaintext
|
# BlueSCSI 1.0-b to 1.0-c
|
||
|
|
:toc: macro
|
||
|
|
|
||
|
|
## Introduction
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
## Steps
|
||
|
|
|
||
|
|
### Disconnect `TERMPOWER` from 220 Pull Up Jupmer
|
||
|
|
|
||
|
|
Use a cutting tool to cut the small trace between the `TERMPOWR` and 220 Pull Up Jumper pictured below.
|
||
|
|
|
||
|
|
Make sure continiutiy from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper.
|
||
|
|
|
||
|
|
image::images/1.0-b-bodge-1.jpg[]
|
||
|
|
|
||
|
|
### Connect 5V to 220 Pull Up Jupmer
|
||
|
|
|
||
|
|
Now we will provide pull up from the 5v provided by the BluePill.
|
||
|
|
|
||
|
|
image::images/1.0-b-bodge-2.png[]
|
||
|
|
|
||
|
|
### Complete!
|
||
|
|
|
||
|
|
Thats it! 5v to the Pull Up resistors will now work when powered externally.
|
||
|
|
|