How do computers calculate complicated trig functions such as tangent? I took a look at Intel's 8087 floating-point chip under the microscope to find out. The chip combines two techniques to evaluate the tan function quickly and accurately: polynomials and an algorithm called CORDIC...
September 26, 2026 at 5:00 PM
How do computers calculate complicated trig functions such as tangent? I took a look at Intel's 8087 floating-point chip under the microscope to find out. The chip combines two techniques to evaluate the tan function quickly and accurately: polynomials and an algorithm called CORDIC...
Intel introduced the 8087 floating-point chip in 1980 to make math faster. The chip does tangents, square roots, and so forth, but fundamentally everything is computed through additions and subtractions, performed by an adder at the heart of the chip. Let's look at the adder's circuitry... 1/N
June 13, 2026 at 4:17 PM
Intel introduced the 8087 floating-point chip in 1980 to make math faster. The chip does tangents, square roots, and so forth, but fundamentally everything is computed through additions and subtractions, performed by an adder at the heart of the chip. Let's look at the adder's circuitry... 1/N
Most computer faults aren’t clean, single bit flips.
In GPUs especially, ~60% of errors are multi-bit events!
This makes a lot of sense when you think about the pipeline.
If you get a corruption early enough, the datapath is way more likely to affect the entire warp.
In GPUs especially, ~60% of errors are multi-bit events!
This makes a lot of sense when you think about the pipeline.
If you get a corruption early enough, the datapath is way more likely to affect the entire warp.
June 12, 2026 at 12:52 AM
Most computer faults aren’t clean, single bit flips.
In GPUs especially, ~60% of errors are multi-bit events!
This makes a lot of sense when you think about the pipeline.
If you get a corruption early enough, the datapath is way more likely to affect the entire warp.
In GPUs especially, ~60% of errors are multi-bit events!
This makes a lot of sense when you think about the pipeline.
If you get a corruption early enough, the datapath is way more likely to affect the entire warp.
A microscope reveals the complex circuitry of the 8087 chip. The microcode ROM in the center holds the micro-instructions. It executes these micro-instructions to add, subtract, compute square roots, arctangents, and so forth. 2/n
May 30, 2026 at 5:42 PM
A microscope reveals the complex circuitry of the 8087 chip. The microcode ROM in the center holds the micro-instructions. It executes these micro-instructions to add, subtract, compute square roots, arctangents, and so forth. 2/n
After buying a PSX and feeling let down with the poor D-terminal adapter options I decided to make a little breakout board.
This is D-Terminator; a passive D-terminal to RCA YPbPr or DVI-I (for Datapath cards) adapter board with audio passthrough to to 3.5mm, and data mode pins exposed.
This is D-Terminator; a passive D-terminal to RCA YPbPr or DVI-I (for Datapath cards) adapter board with audio passthrough to to 3.5mm, and data mode pins exposed.
November 26, 2024 at 2:55 AM
After buying a PSX and feeling let down with the poor D-terminal adapter options I decided to make a little breakout board.
This is D-Terminator; a passive D-terminal to RCA YPbPr or DVI-I (for Datapath cards) adapter board with audio passthrough to to 3.5mm, and data mode pins exposed.
This is D-Terminator; a passive D-terminal to RCA YPbPr or DVI-I (for Datapath cards) adapter board with audio passthrough to to 3.5mm, and data mode pins exposed.
datapath i drew out for a hardware bcrypt implementation back in 2016
iirc i synthesized it but idr if i ever actually verified it…
iirc i synthesized it but idr if i ever actually verified it…
October 25, 2025 at 12:11 AM
datapath i drew out for a hardware bcrypt implementation back in 2016
iirc i synthesized it but idr if i ever actually verified it…
iirc i synthesized it but idr if i ever actually verified it…
The ability of setting the 'No Signal' message for DataPath cards is such a great feature! :3
March 11, 2025 at 5:54 PM
The ability of setting the 'No Signal' message for DataPath cards is such a great feature! :3
the more I read about the TI-99/4A the more it just looks fucking MISERABLE. 16-bit CPU but most of the system RAM is on an 8-bit datapath accessed via the video processor. texas sure put their best engineers on this one huh
April 2, 2025 at 6:24 AM
the more I read about the TI-99/4A the more it just looks fucking MISERABLE. 16-bit CPU but most of the system RAM is on an 8-bit datapath accessed via the video processor. texas sure put their best engineers on this one huh
The green PCB at the bottom obviously throws off the aesthetic but that card is non-negotiable. That's my Datapath capture card for analog video.
August 24, 2025 at 9:06 PM
The green PCB at the bottom obviously throws off the aesthetic but that card is non-negotiable. That's my Datapath capture card for analog video.
#Cilium 1.19 added native mTLS support, bringing inline mutual TLS directly into the Cilium datapath and unifying authentication and encryption into a single operation.
Read more about the effort to bring ztunnel to Cilium: cilium.io/blog/2026/03...
Read more about the effort to bring ztunnel to Cilium: cilium.io/blog/2026/03...
Native mTLS for Cilium: Transparent Encryption Meets Cloud Native Identity with ztunnel
Cilium now brings native, inline mTLS to the Kubernetes datapath with ztunnel, unifying authentication and encryption in a single ste...
cilium.io
March 23, 2026 at 10:48 AM
#Cilium 1.19 added native mTLS support, bringing inline mutual TLS directly into the Cilium datapath and unifying authentication and encryption into a single operation.
Read more about the effort to bring ztunnel to Cilium: cilium.io/blog/2026/03...
Read more about the effort to bring ztunnel to Cilium: cilium.io/blog/2026/03...
Video mode switching demo using Evox M8+ bios which has stock 5838 BIOS video modes.
Captured using a dual input Datapath VisionAV-HD scaled to 1280x720 with OBS. OpenXHD top, YPbPr through a THS7376IPWR video amp bottom.
We aim to be BIOS agnostic so you can use your favorite bios.
Captured using a dual input Datapath VisionAV-HD scaled to 1280x720 with OBS. OpenXHD top, YPbPr through a THS7376IPWR video amp bottom.
We aim to be BIOS agnostic so you can use your favorite bios.
June 11, 2026 at 1:43 PM
Video mode switching demo using Evox M8+ bios which has stock 5838 BIOS video modes.
Captured using a dual input Datapath VisionAV-HD scaled to 1280x720 with OBS. OpenXHD top, YPbPr through a THS7376IPWR video amp bottom.
We aim to be BIOS agnostic so you can use your favorite bios.
Captured using a dual input Datapath VisionAV-HD scaled to 1280x720 with OBS. OpenXHD top, YPbPr through a THS7376IPWR video amp bottom.
We aim to be BIOS agnostic so you can use your favorite bios.
Almost done with the new PC build, I have no thermal paste lol so waiting for that to come in before I install the cooler. Everything else is hooked up. Only things I brought over from my last PC were two PCI cards (a vision datapath for video capture and a parallel port for SNES controller use).
June 20, 2025 at 12:23 PM
Almost done with the new PC build, I have no thermal paste lol so waiting for that to come in before I install the cooler. Everything else is hooked up. Only things I brought over from my last PC were two PCI cards (a vision datapath for video capture and a parallel port for SNES controller use).
I got my XBox hooked up to the datapath capture card and just look at this fucking game, especially the boss at the end of this video.
July 28, 2026 at 2:34 AM
I got my XBox hooked up to the datapath capture card and just look at this fucking game, especially the boss at the end of this video.
In 1980, Intel released the 8087 floating-point chip, making math much faster. I'm reverse-engineering this chip, 46 years later. Most of its instructions are implemented in microcode, but some are implemented in hardware. Let's look at the circuitry that decodes instructions and decides what to do.
February 14, 2026 at 5:46 PM
In 1980, Intel released the 8087 floating-point chip, making math much faster. I'm reverse-engineering this chip, 46 years later. Most of its instructions are implemented in microcode, but some are implemented in hardware. Let's look at the circuitry that decodes instructions and decides what to do.
I need someone at Intel to revive this and we will transform data oceans.
If I explain what's possible and trace the entire datapath and when each layer is vital I will sound insane, so instead I guess I'll just cry about it.
If I explain what's possible and trace the entire datapath and when each layer is vital I will sound insane, so instead I guess I'll just cry about it.
Crying While Eating Ice Cream
ALT: Crying While Eating Ice Cream
static.klipy.com
July 31, 2026 at 10:53 PM
I need someone at Intel to revive this and we will transform data oceans.
If I explain what's possible and trace the entire datapath and when each layer is vital I will sound insane, so instead I guess I'll just cry about it.
If I explain what's possible and trace the entire datapath and when each layer is vital I will sound insane, so instead I guess I'll just cry about it.
I just wrote a BubbleSort in assembly (MIPS) to run on my Datapath created using Logisim and it was so fucking cool
September 6, 2024 at 3:53 AM
I just wrote a BubbleSort in assembly (MIPS) to run on my Datapath created using Logisim and it was so fucking cool
I think the only non-linear part of AES is the s-box, so if you carefully design the logic around the s-box lookup not to leak, everything else should be automatically taken care of by the half-clock and double-datapath scheme.
March 18, 2025 at 12:08 PM
I think the only non-linear part of AES is the s-box, so if you carefully design the logic around the s-box lookup not to leak, everything else should be automatically taken care of by the half-clock and double-datapath scheme.
Virtual memory for RISC-V?
I designed a frugal TLB datapath that traps on miss and uses an M-mode software page table walker. Works great. Boots Linux in spike on RV32/Sv32 and RV64/Sv39.
But with 10-20 misses per 1000 insns and 80? instructions per trap, it turns 1000 insns into 1800-2600. Oops.
I designed a frugal TLB datapath that traps on miss and uses an M-mode software page table walker. Works great. Boots Linux in spike on RV32/Sv32 and RV64/Sv39.
But with 10-20 misses per 1000 insns and 80? instructions per trap, it turns 1000 insns into 1800-2600. Oops.
May 22, 2026 at 1:11 AM
Virtual memory for RISC-V?
I designed a frugal TLB datapath that traps on miss and uses an M-mode software page table walker. Works great. Boots Linux in spike on RV32/Sv32 and RV64/Sv39.
But with 10-20 misses per 1000 insns and 80? instructions per trap, it turns 1000 insns into 1800-2600. Oops.
I designed a frugal TLB datapath that traps on miss and uses an M-mode software page table walker. Works great. Boots Linux in spike on RV32/Sv32 and RV64/Sv39.
But with 10-20 misses per 1000 insns and 80? instructions per trap, it turns 1000 insns into 1800-2600. Oops.
mTLS is now natively in Cilium. If that was your only reason to have a service mesh, maybe now its time to reconsider?
cilium.io/blog/2026/03...
cilium.io/blog/2026/03...
Native mTLS for Cilium: Transparent Encryption Meets Cloud Native Identity with ztunnel
Cilium now brings native, inline mTLS to the Kubernetes datapath with ztunnel, unifying authentication and encryption in a single ste...
cilium.io
April 9, 2026 at 3:23 PM
mTLS is now natively in Cilium. If that was your only reason to have a service mesh, maybe now its time to reconsider?
cilium.io/blog/2026/03...
cilium.io/blog/2026/03...
Here's this week's #retrorgbweeklyroundup! Search any video or podcast app for RetroRGB Weekly, or head to the main link: retrorgb.com/week429.html
.
#retrorgb #classicgaming #retrogaming #misterfpga #ossc #sega #morph #pixelfx #memcardpro #MIMOGeniusII #VisionAV-HD #datapath
.
#retrorgb #classicgaming #retrogaming #misterfpga #ossc #sega #morph #pixelfx #memcardpro #MIMOGeniusII #VisionAV-HD #datapath
Weekly Roundup #429
https://youtu.be/DKg7ahWEvSM
The Roundup is available as a video and on all audio-only podcast services, such as iTunes, Google, Stitcher, Spotify, Amazon Music and direct-download: https://podcaste...
retrorgb.com
October 2, 2024 at 5:11 PM
Here's this week's #retrorgbweeklyroundup! Search any video or podcast app for RetroRGB Weekly, or head to the main link: retrorgb.com/week429.html
.
#retrorgb #classicgaming #retrogaming #misterfpga #ossc #sega #morph #pixelfx #memcardpro #MIMOGeniusII #VisionAV-HD #datapath
.
#retrorgb #classicgaming #retrogaming #misterfpga #ossc #sega #morph #pixelfx #memcardpro #MIMOGeniusII #VisionAV-HD #datapath
"Small operational decisions matter, and their effects accumulate quickly. Choices about routing, IPAM, labels, upgrade validation, and datapath observability all contribute to how a cluster behaves in real-world conditions."
Day 2 with Cilium: Small configurations that keep large clusters boring | Datadog
Read Datadog’s playbook for running Cilium across hundreds of Kubernetes clusters and learn how IPAM tuning, native routing, safe upgrades, and datapath controls influence reliability at scale.
www.datadoghq.com
January 16, 2026 at 1:01 PM
"Small operational decisions matter, and their effects accumulate quickly. Choices about routing, IPAM, labels, upgrade validation, and datapath observability all contribute to how a cluster behaves in real-world conditions."
Also the M-mode TLB miss trap handler will trash my small I-cache. The gift that keeps on giving.
So alas I have now also designed a frugal TLB datapath that ALSO does hardware PTW on TLB miss. Those will be LUTs well spent. Oh well…
So alas I have now also designed a frugal TLB datapath that ALSO does hardware PTW on TLB miss. Those will be LUTs well spent. Oh well…
May 22, 2026 at 1:11 AM
Also the M-mode TLB miss trap handler will trash my small I-cache. The gift that keeps on giving.
So alas I have now also designed a frugal TLB datapath that ALSO does hardware PTW on TLB miss. Those will be LUTs well spent. Oh well…
So alas I have now also designed a frugal TLB datapath that ALSO does hardware PTW on TLB miss. Those will be LUTs well spent. Oh well…
BF3のCPU処理（DPA）に関する資料
arxiv.org/html/2402.03...
arxiv.org/html/2402.03...
Demystifying Datapath Accelerator Enhanced Off-path SmartNIC
arxiv.org
April 10, 2025 at 9:24 AM
BF3のCPU処理（DPA）に関する資料
arxiv.org/html/2402.03...
arxiv.org/html/2402.03...
The capture card is a whole nother beast. It's a vision datapath. MSRP for those is about a grand. Mine cost 75 bucks on a lucky ebay listing. Not used by many ppl other than hardcore rgb enthusiasts
June 28, 2025 at 5:56 AM
The capture card is a whole nother beast. It's a vision datapath. MSRP for those is about a grand. Mine cost 75 bucks on a lucky ebay listing. Not used by many ppl other than hardcore rgb enthusiasts