[doc] Move reference info to the end

README.md

@@ -4,8 +4,8 @@ This repository contains software, build flows and examples for the [Sonata Syst
 For a guide on how to get up and running on building software for the sonata board see the [getting started guide][].
 After you are all set up, take a look at the [exercises][].
 
-[sonata system]: https://github.com/lowRISC/sonata-system
-[sonata pcb]: https://github.com/newaetech/sonata-pcb
+[Sonata System]: https://github.com/lowRISC/sonata-system
+[Sonata PCB]: https://github.com/newaetech/sonata-pcb
 [getting started guide]: ./doc/getting-started.md
 [exercises]: ./exercises/README.md
 
@@ -15,25 +15,12 @@ You are in the [`sonata-software`][] repository.
 This repository wraps the [`cheriot-rtos`][], which is included in this repository as a submodule.
 [`cheriot-rtos`][] contains the CHERIoT software stack as well as drivers for using the Sonata board; it is well documented by the [CHERIoT Programmer's Guide][].
 
-Other repositories of note:
-- [`sonata-system`][]: holds the Sonata system RTL and bootloader which come together to generate the bitstream.
-- [`sonata-rp2040`][]: The firmware that is running on the Sonata's RP2040 microcontroller and emulates the 'SONATA' drive when you plug it into your computer.
-- [`CHERIoT-Platform/llvm-project`][]: The CHERIoT LLVM compiler toolchain.
-- [`cheriot-audit`][]: A tool to explore and verify the relationships between CHERIoT RTOS components.
-- [`CHERIoT-Platform/book`][]: The source of the [CHERIoT Programmer's Guide][].
-
-For hardware documentation, see the [Sonata system book][].
+You do not need this to do the exercises but if you would like more detailed documentation about the hardware, see the [Sonata System book][].
 
 [`sonata-software`]: https://github.com/lowRISC/sonata-software
 [`cheriot-rtos`]: https://github.com/CHERIoT-Platform/cheriot-rtos
-[`sonata-system`]: https://github.com/lowRISC/sonata-system
-[`sonata-rp2040`]: https://github.com/newaetech/sonata-rp2040
-[`CHERIoT-Platform/llvm-project`]: https://github.com/CHERIoT-Platform/llvm-project
-[`cheriot-audit`]: https://github.com/CHERIoT-Platform/cheriot-audit
-[`CHERIoT-Platform/book`]: https://github.com/CHERIoT-Platform/book
 [CHERIoT Programmer's Guide]: https://cheriot.org/book/
-[Sonata system book]: https://lowrisc.org/sonata-system/
-
+[Sonata System book]: https://lowrisc.org/sonata-system/
 
 ## License
 

SUMMARY.md

@@ -8,11 +8,12 @@ SPDX-License-Identifier: Apache-2.0
 
 - [Getting started](./doc/getting-started.md)
   - [Running Sonata software](./doc/guide/running-software.md)
-  - [Using Sonata IO](./doc/guide/sonata-io.md)
-
-- [Exploring the CHERIoT RTOS](./doc/exploring-cheriot-rtos.md)
-- [Auditing firmware](./doc/auditing-firmware.md)
 
 - [Exercises](./exercises/README.md)
   - [Hardware access control exercise](./exercises/hardware_access_control/README.md)
   - [Firmware auditing exercise](./exercises/firmware_auditing/README.md)
+
+- [Reference](./doc/reference/README.md)
+  - [Using Sonata IO](./doc/guide/sonata-io.md)
+  - [Exploring the CHERIoT RTOS](./doc/exploring-cheriot-rtos.md)
+  - [Auditing firmware](./doc/auditing-firmware.md)

doc/reference/README.md

@@ -0,0 +1,25 @@
+# Reference
+
+The rest of this book is reference and background information.
+This information is not necessary to do the exercises, but is still useful for the broader context.
+
+You may also want to look at the other documentation available for Sonata and CHERIoT in general:
+- [`sonata-system`][]: holds the Sonata System RTL and bootloader which come together to generate the bitstream.
+This repository also has a rendered [Sonata System book][].
+- [`sonata-rp2040`][]: The firmware that is running on the Sonata's RP2040 microcontroller and emulates the 'SONATA' drive when you plug it into your computer.
+- [`sonata-pcb`][]: The printed circuit board design for Sonata.
+- [`cheriot-rtos`][]: The CHERIoT software stack as well as drivers for the Sonata board.
+- [`CHERIoT-Platform/llvm-project`][]: The CHERIoT LLVM compiler toolchain.
+- [`cheriot-audit`][]: A tool to explore and verify the relationships between CHERIoT RTOS components.
+- [`CHERIoT-Platform/book`][]: The source of the [CHERIoT Programmer's Guide][].
+
+[`sonata-software`]: https://github.com/lowRISC/sonata-software
+[`cheriot-rtos`]: https://github.com/CHERIoT-Platform/cheriot-rtos
+[`sonata-system`]: https://github.com/lowRISC/sonata-system
+[`sonata-rp2040`]: https://github.com/newaetech/sonata-rp2040
+[`CHERIoT-Platform/llvm-project`]: https://github.com/CHERIoT-Platform/llvm-project
+[`cheriot-audit`]: https://github.com/CHERIoT-Platform/cheriot-audit
+[`CHERIoT-Platform/book`]: https://github.com/CHERIoT-Platform/book
+[CHERIoT Programmer's Guide]: https://cheriot.org/book/
+[Sonata System book]: https://lowrisc.org/sonata-system/
+[`sonata-pcb`]: https://github.com/newaetech/sonata-pcb