My passion: wireless communications, dsp processing & FPGAs, embedded Systems. Cinvestav phd. Love for #retrocomputing, https://nitter.cf/t.co/oN2nPp1b4O 🇲🇽
Guadalajara, Jal.,Mexico.
Joined March 2011
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dsp8bit retweeted
After 25 years, the original Xbox's last hidden ROM has finally been dumped: the CPU's microcode!
This has been a goal of mine for over 6 years, and I've worked on it off and on ever since.
Over the last couple of weeks, while building inventory and shipping orders, I've also been running hardware tests 24/7. This poor Xbox has rebooted over 50,000 times in those two weeks alone.
And it finally paid off.
The dump covers the entire 4,096-line microcode address space. The ROM itself occupies 3,200 of those lines, roughly 12 KB of microcode.
I can't overstate how huge this feels. After all these years, I finally have it.
A full write-up is coming next year!
dsp8bit retweeted
I just found this in my son’s room is he doing drugs?
Readers added context they thought people might want to know
This image has been stolen for monetization, against Twitter/X rules. It's at least a year old.
facebook.com/groups/2949051…
dsp8bit retweeted
1/ Llevo más de un año trabajando en MxOS, una distribución GNU/Linux para México basada en CentOS Stream 10. No está lista para tu laptop. Sí está lista para que la revises, la critiques y le metas mano. Hilo sobre qué hay hoy y qué falta.
ALT Logotipo de MxOS, un águila gris con plumas verdes y la palabra MxOS, junto al texto: Fundación MxOS. Soberanía Tecnológica para México. Construyendo una distribución Linux segura, abierta y soberana para México. mx-os.mx
dsp8bit retweeted
I've had an SE/30 for a really long time and I've never seen a Linux kernel boot on it.
This is Linux 7.2.8
Claude made it really easy and optimized a kernel for maximum performance using MAME as a build / test "machine"
It eventually created a bootable SD card that I dropped into my SCSI2SD and was up running
2026 is peak computer
dsp8bit retweeted
It’s alive.. working on firmware bringup
Going to see if I can pull off a CNC machined digital SMPS using an STM32G474 and LMG5200 GaN half bridge as a power distribution board for my hobby robot.
The GaN stage will be driven by the G474's HRTIM, with ~184 ps (~5.44 GHz equivalent) timing resolution.
Inductor current is measured with a 4 terminal kelvin shunt (much more reliable on CNC boards, as kelvin is internal to the resistor) and high side INA sense amp, feeding both an ADC and an on chip comparator.
Planning to run peak current-mode control.. an internal DAC set by the outer voltage loop defines the cycle by cycle current threshold on the comparator, which asynchronously terminates the PWM pulse through HRTIM hardware.
The outer voltage loop will use the G474's FMAC accelerator for 3P3Z IIR compensation from a voltage divider buffered using an internal opamp follower routed to another ADC channel. Also connected to a comparator for HRTIM fault events for fast hardware based over voltage lockout.
Includes a INA254 bidirectional sense amp with integrated 400uOhm shunt for monitoring battery current.
Added CAN bus to broadcast voltage, current and status telemetry across the platform.
dsp8bit retweeted
HUGE release 1.0.0 for the #OpenXC7 open source FPGA toolchain! We are finally leaving @gatecatte 's 7 year old nextpnr-xilinx behind and are now fully based on upstream nextpnr with feature parity!
github.com/openXC7/toolchain…
dsp8bit retweeted
🚀 ¡Tu talento puede ser parte del futuro de los semiconductores en Jalisco!
Únete a la sesión informativa y descubre cómo dar el siguiente paso en Nodo Silicio.
Conéctate: gobjal.mx/SesiónNodoSilicio
dsp8bit retweeted
When I created Raspbian for the Raspberry Pi, I was excited to help bring low-cost compute into the hands of a next generation of tinkerers and programmers.
However, I now despair that a Raspberry Pi can cost upwards of $300 because AI shortages are making personal computing unaffordable. Furthermore, bright young people are being discouraged from learning programming because they are being told it is now a commodity skill that AI will do.
I have to ask myself what it was all for. Is this the future we were promised? If so, I'm starting to regret my part in it.
dsp8bit retweeted
I remember telling my boss at a former employer that engineers of the 90's were significantly more skilled than those today and he didn't believe me
dsp8bit retweeted
El influencer Diego Ruzzarin se molestó porque revelé su contrato de 864 mil pesos con el gobierno de Veracruz de Rocío Nahle para dar una conferencia.
Ninguno de ellos cree en la libertad de expresión. TODOS son CENSURADORES. Que quede registro.
