diff --git a/README.md b/README.md
index 59417b1..c4b3bbb 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ The card enables the Apple II to boot from and write to virtual hard drive image
 If you have a problem or idea for enhancement, log an issue [here](https://github.com/tjboldt/Apple2-IO-RPi/issues) or start a [discussion](https://github.com/tjboldt/Apple2-IO-RPi/discussions/categories/general). I recommend starring/watching the project for updates on GitHub. You are welcome to fork the project and submit pull requests which I will review. The latest version has an in-memory virtual drive representing current working directory in Linux for ease of copying files between Linux and ProDOS when the drive 1 is not specified as a file.
 
 ### Pico Hardware
-Ralle Palaveev has a version of the hardware that uses a RPi Pico to handle firmware and communications to the host over USB.
+Ralle Palaveev has a version of the hardware that uses a RPi Pico to handle firmware and communications to the host over USB. This uses Oliver Schmidt's PIO code.
 
 ## Roadmap
 See [List of issues tagged roadmap](https://github.com/tjboldt/Apple2-IO-RPi/issues?q=is%3Aissue+is%3Aopen+label%3Aroadmap+author%3Atjboldt) 
@@ -49,8 +49,8 @@ See [List of issues tagged roadmap](https://github.com/tjboldt/Apple2-IO-RPi/iss
 - ([@Abysmal](https://github.com/Abysmal)) for shell and rpi.command testing
 - ([@bfranske](https://github.com/bfranske)) for suggesting adding the 5V jumper
 - Tim Boldt ([@timboldt](https://github.com/timboldt)) for recommending removing sysfs based GPIO code
-- Oliver Schmidt ([@oliverschmidt])(https://github.com/oliverschmidt/apple2-io-rpi/)) for writing the Pico PIO and firmware
+- Oliver Schmidt ([@oliverschmidt](https://github.com/oliverschmidt/apple2-io-rpi/)) for writing the Pico PIO and firmware
 - Ralle Palaveev ([@rallepalaveev](https://github.com/rallepalaveev/a2pico)) for Pico hardware design
 
 ## Similar Project
-If you prefer having Apple II peripherals control a Raspberry Pi rather than simply using the Raspberry Pi to provide storage, network access and processing to the Apple II, have a look at David Schmenk's excellent [Apple2Pi](https://github.com/dschmenk/apple2pi) project. I am often asked about differences between these two projects. They are similar in some ways but essentially opposite. The Apple2Pi is meant for the primary machine to be the RPi, using the Apple II for it's peripherals. The Apple2-IO-RPi is meant to have the Apple II as the primary machine and just use the RPi for its processing, storage and network.
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+If you prefer having Apple II peripherals control a Raspberry Pi rather than simply using the Raspberry Pi to provide storage, network access and processing to the Apple II, have a look at David Schmenk's excellent [Apple2Pi](https://github.com/dschmenk/apple2pi) project. I am often asked about differences between these two projects. They are similar in some ways but essentially opposite. The Apple2Pi is meant for the primary machine to be the RPi, using the Apple II for it's peripherals. The Apple2-IO-RPi is meant to have the Apple II as the primary machine and just use the RPi for its processing, storage and network.