Yet another vim meme

I just can't learn dance moves, every tutorial is like 1, 2, 3, 4 ... 1, 2, 3, 4 where's the freeken first step?

hi

i just spent 6 hours and 25 minutes trying to figure out why data doesnt get inserted and updated into database but works locally.

after 6 hours and 25 minutes i realized i forgot to put connection.commit() in my code after inserting and updating queries.

ok

Took the AWS SysOps Admin exam today and failed .
Preparing to retake it, with a different strategy.

Now am scared! lol

This might not be a perfect place to post this, but we are trying to get help from all possible places.

As you may know, Kerala, a state in India, is going through the worst time of its history. We are exposed to tumultuous and disastrous flooding which have destroyed both our life and living.
All the rivers, streams and lakes are overflowing throughout the states due to heavy rainfall. The shutter of all the dams have been opened and the water rush have washed away the towns and villages on it's flood path. The situation is much more frightening than we can explain.
Over 250000 people are in rehabilitation camps. Even hospitals are under water. The count of the lives that we have lost and people missing are still not confirmed yet. The roads, bridges and homes damaged are beyond repair. Rivers have been spilling over and the hills are crashing down in landslides to thickly-populated settlements. Our government and rescue bodies are doing commendable work for saving each and every life, but are facing severe shortage of funds and resources. This has affected the efficiency of the rescue efforts, which also contribute to the increasing death toll. It is estimated unofficially that the cost of disaster can be up to 100 billion INR, which seems to be a huge fund for our small state.
So hereby we are requesting your kind donation and aid towards relief fund of the state.Your valuable donations will grossly help us to ease our efforts for relief, re-habitilation and re-building.

I'm not posting any links where you can donate, I'm aware that you guys can google it.

Q: What do Computers and air conditioners have in common?

A: Both become useless when you open Windows.

I just got a bit into OpenCV and I am completely exited. I built a little ball tracker (Yes I know that the cross is on the other side, it's inverted so the cross is at the same position as the ball in front of the camera) and although it is not the most advanced project I think it's kinda cool.

Just thought I'd share my current project: Taking an old ISA sound card I got off eBay and wiring it up to an Arduino to control its OPL3 synth from a MIDI keyboard. I have it mostly working now.

No intention to play audio samples, so I've not bothered with any of the DMA stuff - just MIDI (MPU-401 UART) and OPL3.

It has involved learning the pinout of the ISA bus connectors, figuring out which ones are actually used for this card, ignoring the standards a little (hello, amplifier chip that is wired up to the +12V line but which still happily works at +5V...)

Most of the wires going to it are for each bit of the 16-bit address and 8-bit data. Using a couple of shift registers for the address, and a universal shift register for the data. Wrote some fairly primitive ISA bus read/write code, but it was really slow. Eventually found out about SPI and re-wrote the code to use that and it became very fast. Had trouble with some timings, fixed those.

The card is an ISA Plug and Play card, meaning before I could use it I had to tell it what resources to use. Linux driver code and some reverse-engineering of the official Windows/DOS drivers got me past this stage.

Wired up IRQ 5 to an Arduino interrupt to deal with incoming MIDI data, with a routine that buffers it. Ran into trouble with the interrupt happening during I/O and needing to do some I/O inside the handler and had to set a flag to decide whether to disable/re-enable interrupts during I/O.

It looks like total chaos, but the various wires going across the breadboard are mainly to make it easier to deal with the 16-bit address and 8-bit data lines. The LEDs were initially used to check what addresses/data were being sent, but now only one of them is connected and indicates when the interrupt handler is executing.

There's still a lot to do after that though - MIDI and OPL3 are two completely different things so I had to write some code to manage the different "channels" of the OPL3 chip. I have it playing multiple notes at the same time but need to make it able to control the various settings over MIDI. Eventually I might add some physical controls to it and get a PCB made.

The fun part is, I only vaguely know what I'm doing with the electronics side of this. I didn't know what a "shift register" was before this project, nor anything about the workings of the ISA bus. I knew a bit about MIDI (both the protocol and generally how the MPU-401 UART works) along with the operation of a sound card from a driver/software perspective, but everything else is pretty new to me.

As a useful little extra, I made some "fake" components that I can build the software against on a PC, to run some tests before uploading it to the Arduino (mostly just prints out the addresses it is going to try and write to).

There should be a deep category to post this kinda stuff

DevOps is like development, except there is zero test coverage, everything is a race condition, and there are a million variables declared as global. 😡

Look at the comment... Kind of support I needed a few hours before my AI exam