#lfsr — Public Fediverse posts

Last night fixed a bug in my LFSR (Linear-Feedback Shift Register) implementation on the Z80, which was due to a misunderstanding of the difference between the Rotate Right instructions RRC L and RR L. They both use the Carry flag: RR is a 9-bit rotation using the Carry; RRC is a _circular_ rotation, which apparently means the Carry does not participate in the rotation and is a copy of the result's top-bit. I had forgotten and misread my quickref. I thought RRC would be Rotate Right with Carry. Haha, no.

#Z80 #LFSR

I added a random number generator (a LFSR using polynomial for n=16 from XAPP052) and a subroutine for PRINT AT to my ZX81 "game".

#zx81 #rng #lfsr

LFSR CPU Running Forth

https://github.com/howerj/lfsr-vhdl

#HackerNews #LFSR #CPU #Forth #VHDL #HackerNews

it's an analog shift register with two feedback paths. each stage is made of one transistor, one capacitor, one resistor and a LED. the feedback is comparable to a #LFSR

Linear Feedback Shift Registers for FPGAs https://hackaday.com/2024/04/06/linear-feedback-shift-registers-for-fpgas/ #linearfeedbackshiftregister #pseudo-random #randomnumber #FPGA #LFSR

Linear Feedback Shift Registers for FPGAs - If you want to start an argument at a Hackaday meeting, you have only to ask somet... - https://hackaday.com/2024/04/06/linear-feedback-shift-registers-for-fpgas/ #linearfeedbackshiftregister #pseudo-random #randomnumber #fpga #lfsr

I'm currently trying to decode the bitstream of the Traktor Timecode MK2. Interestingly nobody figured it out completely yet. It seems like the bits are encoded through the y offset. Wrote some toy code to detect this and push the bits to a ringbuffer. Buuuut I'm getting state duplications which shouldn't be possible?

Maybe someone is experienced with reverse engineering bitstreams 👼?

https://codeberg.org/obsoleszenz/libdvs/src/branch/main/crates/libdvs/src/lib.rs#L25

#timecode #dvs #bitstream #hacking #lfsr #xwax #dj

I'm currently trying to decode the bitstream of the Traktor Timecode MK2. Interestingly nobody figured it out completely yet. It seems like the bits are encoded through the y offset. Wrote some toy code to detect this and push the bits to a ringbuffer. Buuuut I'm getting state duplications which shouldn't be possible?

Maybe someone is experienced with reverse engineering bitstreams 👼?

https://codeberg.org/obsoleszenz/libdvs/src/branch/main/crates/libdvs/src/lib.rs#L25

#timecode #dvs #bitstream #hacking #lfsr #xwax #dj

I'm currently trying to decode the bitstream of the Traktor Timecode MK2. Interestingly nobody figured it out completely yet. It seems like the bits are encoded through the y offset. Wrote some toy code to detect this and push the bits to a ringbuffer. Buuuut I'm getting state duplications which shouldn't be possible?

Maybe someone is experienced with reverse engineering bitstreams 👼?

https://codeberg.org/obsoleszenz/libdvs/src/branch/main/crates/libdvs/src/lib.rs#L25

#timecode #dvs #bitstream #hacking #lfsr #xwax #dj

I'm currently trying to decode the bitstream of the Traktor Timecode MK2. Interestingly nobody figured it out completely yet. It seems like the bits are encoded through the y offset. Wrote some toy code to detect this and push the bits to a ringbuffer. Buuuut I'm getting state duplications which shouldn't be possible?

Maybe someone is experienced with reverse engineering bitstreams 👼?

https://codeberg.org/obsoleszenz/libdvs/src/branch/main/crates/libdvs/src/lib.rs#L25

#timecode #dvs #bitstream #hacking #lfsr #xwax #dj

Logic puzzle 101: You got a strange message that does not make any sense. Can you decypher it with the following logic puzzle?

https://luckyresistor.me/2023/02/02/logic-gates-puzzle-101/

#puzzle #logic #gate #flipflop #xor #xnor #dlatch #lfsr #circuitart #circuit

How the classic game Pitfall! stored its room data in 1 byte... and how they didn't store the map at all (except in code)!

#retrogaming #lfsr #proceduralgeneration #programming

https://evoniuk.github.io/posts/pitfall.html

Monochrome LCD Video Hacks Galore! - [Wenting Zhang] is clearly a fan of old school STN LCD displays, and was wondering... - https://hackaday.com/2022/05/12/monochrome-lcd-video-hacks-galore/ #errordiffusion #videohacks #dithering #lfsr #lcd #pdm #pwm