Release notes

Rocket-core (Chisel)
- Corrections to tag cache security and Rocket behaviour corrected.
Software environment
- Choice of boot options controlled by DIP-switches from one executable.
- Accelerated, interrupt driven access to SD-cards in Linux.
- Interrupt driven access to 100Base-T F/D Ethernet Linux device driver.
- Remote Booting from Ethernet or 4-bit SD-mode supported.
- Network Filing System root supported (with static IP addresses).
- DHCP networking and Dropbear SSH server/client remote access with local SD-card root.
- Linux userland based on adapted version of RISCV-poky Linux.
lowRISC-chip
- Accelerated, reduced overhead interrupt-driven control of SD-card.
- Faster integration of keyboard, and scrolling of VGA display, better integration with LowRISC console.
- Choice of booting from remote ethernet protocol, SD-card, or remote trace debugger.
- Unattended, networked operation (with remote multi-user access) possible, subject to performance constraints.
Design environment
- Updated demo images for NEXYS4-DDR FPGA.
- Add etherboot (SD-card root or NFS-root) targets to fpga Makefile.
- Streamlined build more easily meets design constraints.
Missing from this release vs the previous
- Minion was temporarily removed because it was a performance bottleneck in the Linux device driver architecture.
- Quad SPI memory is dedicated to bitstream configuration.