Projects

Added zfs verification to the cryptographic disk driver configuration utility cgdconfig(8). This allows using raw cgd devices as vdevs in a zfs pool without requiring an intermediate disklabel or partition table. (PR #58212, committed.)

An initial ramdisk with encrypted ZFS root pool support. Using this ramdisk it is possible to set up a system in such a way that the only unencrypted data is the UEFI boot partition and all persistent file systems are ZFS.

Adds sysctl tunables allowing the user to set charging thresholds, inhibit charging, or force discharge ThinkPad batteries in order to extend their battery lifespan.

Adds sysctl tunables for control method batteries implementing the ACPI battery maintenance data (_BMD) and control (_BMD) methods. I don’t have the hardware to test this, so feedback is welcome.

I am currently working on getting nested automounting to work. While the new (FreeBSD) autofs automounter is in many ways better than the previous Berkeley implementation, lack of nested automounting is a serious regression and needs to be fixed.

A pre-trained neural network is employed to compute a style vector for a given style image. This vector is then used to train a style transfer network to turn arbitrary content images into stylized images (pastiches).

Another implementation of Johnson’s style transfer model, this time using PyTorch. Uses Hydra for simple training configuration. Pre-trained models for various styles made available via torch hub.

Style vectors are computed for a small number of style images instead of just a single one. A style transfer network is trained to turn arbitrary content images into pastiches in any (mix) of the given styles.

A style transfer network is trained on pairs of style and content images to produce stylized versions of images in previously unseen styles.

A iterative approach to style transfer based on methods of optimal transport.

A basic tensor/backprop and neural networks package built on top of NumPy. Essentially a vectorized version of Karpathy’s micrograd.

A collection of tools I wrote to aid in reverse engineering and modifying OpenBoot device firmware.

With this mod, the SPARCstation LX onboard CG6 framebuffer will generate resolutions up to 1600x1200 or 1920x1080. The repository also contains an explanation of how to reprogram the ICS1562M pixel clock generator chip.

The Sun TGX+ framebuffer is very similar but has 4MB of VRAM, enough to increase the resolution to 1920x1200 or even 2560x1600. This repository also contains an explanation of how to load firmware over the network in testing.

The SPARCstation 10SX/20 onboard CG14 is a 24-bit capable framebuffer with up to 8MB VRAM. It can display the same resolutions as the TGX+ in double-buffered mode, or up to 1600x1200 or 1920x1080 in 24-bit true color. Getting X11 to work on a modified CG14 required some changes to the xf86-video-suncg14 driver for which I submitted the necessary patches.

Long ago I came into the possession of an IBM PS/2 P75 Portable, a briefcase shaped computer with a 10 inch orange gas plasma display. After diving deep into the spec sheets I finally figured out how to get it to boot from a standard PC floppy drive. I designed a little PCB to convert a PC drive to one suitable for the IBM PS/2 P70/P75.

Certain Sun SPARCstations use M48TXX NVRAM chips to store their mac address, serial number, and other configuration. These chips have a builtin battery which fails eventually. This little PCB provides a clean solution to the issue.

Replacement for the proprietary, hard to find, and expensive SCSI terminator required to run a VAXstation 3100. I know it looks like regular wide SCSI, but it really is not!