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).

Some time 199x, when I was still a little kiddo, my dad bought a PC. It had a big ass HDD (dimensions-wise), 1x 3.5" floppy disk drive and a 5.25" floppy disk drive. It ran DOS. Dad managed to hook up a dot matrix Epson printer to it and used the computer for writing... whatever, really :)

Then dad got some of those 5" floppies with games and installed them on our PC. Mach3, Indy, Entity and Atlantis were my favourite ones. Later we got Wolfenstein 3-D, but that was just too scary, too intense for me.

All that was years before we got Windows 3.0 installed there.

Heh.. Came across my first PC last week :) oh the nostalgy... Entity, Mach3, wolfeinstein 3d, Dangerous Dave in a haunted mansion and a guy pushing boxes in a 2d maze.

DOS, nc and windows 3.1 [in that pile of 5" floppies bottom left].

oh the times!

Alright, i'm fucking done.

Fedora: Packages are self-referencial, using the system is like sprinting through a fucking minefield.

Linux Mint: "lol just don't update packages on the repo because shit can't break if it never updates! Don't add custom repos either or we'll just fucking break your PC."

Debian Raw: "We have all of 5 packages on our repos and GPG is fucking broken so you can't add more repos."

Arch: "Have fun modifying the boot disk for 30 hours so it'll boot, and let's tack on another 30 to make it install properly."

Gentoo: "LOL what is swap. Let's just pipe garbage into this partition as fast as the disk will let us for literally no reason. I'm sure you can still use the system for all of 30 minutes, at which point your SSD will give out. No big deal..."

when did Linux go to shit?

Windows isn't any better without billions of tweaks and then a build upgrade (in that order specific) to make it run properly.

Nor is OSX, as it runs on the model of "lol gotta hack your own PC to run custom unapproved binaries!"

Fuck it.

I'm installing DOS.

Ages ago, it was still in the last millenium which will not end soon at that point of tine, I had a 10MB HDD in my first computer. It was a gift and second hand, and DOS 3.2 was installed on it, and my younger self, unable to talk or write english, had that cool game on it (Pitfall, if I remember correctly). But that game was not enough, so I tried to enter all the filenames in all the folders to find other games on that machine. Some commands were ther which I have not understand correctly, and one of them was 'format'. Typed in 'format' and pressed enter, an error message appears that I have to enter a drive letter as argument. Because I had known only A: for the floppy drive and C: for the HDD i tried at first with the floppy. Nothing happens, vecause there was no disk in the drive. Then I entered C: ...

Poof, everything deleted...

I was unable to setup that pc again and my so beloved game was gone also.. still sad about it, because that machine would be a real treasure today but it is gone a long time ago.

!dev

A child's mind is fascinating.

I remember how it felt being a kid, just deliriously happy.

Things were magical, mystical and happy.

I knew the world wasn't perfect, I knew bad things happened to good people.

But a kid's mind is so powerful that it can fill in the blanks with the most cheerful and optimistic perspectives.

And at some point in my childhood I was exposed to videogames, and that kinda took me down fantasy lane even further.

I was extremely young and barely retaining any memories when I was exposed to my first console, a famicom.

I have a somewhat vivid memory of my mind being blown away for the first time by watching my brother play New Ghostbusters II for NES.

From then on, we never stopped and played several console and dos/pc games.

When I was 10, someone from the neighborhood brought in a couple of floppys with Pokemon Yellow.

"What? Pokemon? How the fuck is that even possible? This is a pc, not a gameboy".

I didn't know at the time what an emulator was, but I was super fucking stoked to be able to play that.

My dad had a 1 gb laptop from work that he didn't use, so I hoarded that shit, and I would get to bed and play nearly everyday.

The experience was surreal. I was doing pc gaming... not on a chair, on a fucking bed, and I was playing a gameboy game... on a pc.

It was so intense to me, that even after more than 2 decades of that time in my life, I still remember how it feels like.

Like, you know how you can "feel" things if you think about them? like for example if you think about the taste of chicken, you can somehow feel it for a second.

Well I have like an actual physical sensation linked to that experience but I can't explain it at all, because it's just a sensation.

I think people usually say they feel that way, for example, about the PSX (usually refered to as ps one) loading screen. I experienced that too but when I was 12, so it was not as intense (it does make me feel the fuzzies though).

I also remember other things with very high detail, like the texture of my bed cover, the weather, mom cooking, the clunky shape of the laptop, the way I carelessly stored it above a pile of magazines, etc.

I rememeber ofc how it felt looking at the game sprites, interacting with NPCs, and the goddamn fucking glorious music.

It was dreamy.

Years and years later, I grew up and I stopped living in fantasy world and became more aware of the grim aspects of life my younger self was sugarcoating.

So I tried to play pokemon again, again and again, and no matter how hard I tried to revive that euphoria, I could not never do it.

I started to get annoyed at the game.

"Come oooon, I did the tutorial already, let me skip this.
This pokemon is useless, why am I even training it.
Fuck, I'm tired of grinding"

At some point I accepted that the feeling would never return, and that it would just live in my memory.

Ironically, I can recall that memory and how it felt anytime I want to.

And I can actually still feel it, and throughtout these years, it has never wore down.

And eventually I learned how to play pokemon and enjoy it:

I read tier lists at smogon online and just catch and train the pokemons that are higher on the list, which is how i got to beat yellow in like 3 days.

(This is nothing compared to what speedrunners do, but much better than the weeks it had taken me in the past).

That served as an important lesson that when a kid plays a game, his mind is also the game at the same time, filling the blanks with its imagination.

A very similar experience happened to me with harvest moon, which is the precursor of stardew valley.

and that game is faaar more emotional: you talk to people, overtime you befriend them and they open up, you meet a girl, you marry her, have a kid

you get farm animals, you brush them, they become happy

you get attached

that game was also so powerful in me that in all naiveness I thought I wanted to be a farmer.

Eventually I grew up and hit puberty and from then on, I focused more on competitive games, like smash bros, cs and tf2.

and i dunno how to end a post so eat my fucking nuts

My first PC was a USSR clone of the IBM XT 5160-086 PC, but with a different design, and beefier RAM. I was shown a game in it (barbarian), and the next evening I really wanted to play again, so I inserted the floppy disk, booted up into DOS and Norton Commander, and was stuck. It's my first ever interaction with a computer. So i typed "computer, please give me barbarian".
I was way ahead of the time you could say :)

Rantberry PI

Thinking about making this into a terminal that accepts a serial connection from my IBM 5150 PC for that Chroma Green authentic text based experience. ;)

Seriously though. How awesome would it be to use a circa 1981 IBM 5150 as your terminal? Lol!

It was 1987. I was 13. My first dev project started with a $1,300 IBM PC XT clone I bought from a relative who was a “dealer” of PCs for some company. It took all the savings I had from birthday money and mowing lawns for several summers at $5 a pop.

My mom wanted to encourage me to learn it more in depth, and she also wanted to know more for her job as a librarian, so she bought us a bunch of books about DOS, BASIC, and Assembler.

I first got familiar with DOS and then dove into Assembler without realizing what it really was (and how much easier BASIC would be). After hours and hours of typing in what, to me, then, was complete gibberish, I grabbed the BASIC book to see what it had to offer.

I never went back to the Assembler book.

A kid at school had given me a BASIC program he had typed in from a magazine. It was a flight simulator of sorts but with a helicopter, IIRC. I loaded up that bad boy and got to hacking. I didn’t get much done with it but I did build a few other menu navigation programs to explore the language more.

That led to PROLOG, C, PASCAL, Visual Basic, Perl, ASP, ColdFusion, and now PHP.

My parents (mom and grandma) helped me buy my first PC. I had some money saved from mowing lawns and they supplemented the rest. Mom, a library director, got a bunch of DOS and Assembler and BASIC books and encouraged me to teach myself.

That turned into computer camps and helping with tech at the library and school. That turned into a computer science and aerospace scholarship to college where I learned C and Unix.

That turned into a degree in business information systems and a career in web development.

19 more years to go and I can retire.

When I was a child I was allowed to use my dad's PC (my parents are divorced) (~1995-6, 3-4 yrs) - back then I played blockout and space Invaders on that windows 2.0 machine. My mum later got a win 3.1 box and I often played around in paint - so did I on my dad's new windows 95 pc. Back then I wasn't able to read (which usually isn't uncommon for a 4-5 yr old) but I was so fed up with those constant "do you want to save this thing dialogs" that I started to learn reading with the help of my parents. (Thanks to that I was able to play Monkey Island 2 :D )

Fast forward to the first years of school: we had two PC's in the classroom and I somehow fixed basic errors so my teacher signed.l me up for the computer course in the second year - usually only students in the third and fourth year may attend this course. I was so thrilled and that was the time where I learned basic DOS stuff and how to build a PC. Again fast forward some years to the 6th year - again another teacher saw my interest in it and asked me if I'd be interested in the basic programming course where I then learned basics in HTML, CSS and JS but that was not enough for me and so I did some research and learned php. In high school, my major was science and IT and in the last year, my IT teachers sat in the IT class and I held the courses as my knowledge was greater than theirs. And yep, that's pretty much how I started coding

My first exposure to computers was the TRS-80 (a.k.a. TRASH-80) my mom (the city Library Director) bought for library patrons to use. It’s data store was on a cassette tape and programs came on cartridges, IIRC.

Around the same time I was learning to do Logo and BASIC on an Apple IIe in 5th grade.

My cousin’s Commodore 64 came next and my grandma saw how my interest in computers was blooming, so she suggested I use the savings I had built up from birthday money and mowing lawns to buy an IBM PC/AT 8088 clone. $1,300 later and lots of time in my basement figuring out how to build it all from separately-shipped components, I was on my way to learning Assembler, BASIC, and DOS.

When I was maybe 3 years old my dad built a PC with a server case, it was huge! The processor was probably something like 386/486 - not sure. I used to play DOS games on it all day long. And the best part is that we still have the PC and surprisingly it still runs!

(Meanwhile I am cloning my secondary 1TB HDD to a 6TB one)

TLDR; After my dad was lazy, I assembled the parts myself.

As far back as I can remember, if I think of my father he is sitting behind his pc playing games. It was like me, his escape.

When I was between 3-5 years old he upgraded his pc to one that supported windows 95. The most exciting thing I remember about his new pc is that it had a sound card or what passed as one anyway - think polyphonic ring tones in place of onboard beeps. It was fucking awesome.

He gifted his old 386 to my brother and I which we spent a blissful year or so playing DOS games on until it finally died. I wouldn't have access to a home computer again until I was 11 - touching my fathers computer was out of the question, never mind actually using it.

The reason I didn't have access to a pc was simply because he didn't replace his pc - he made minor upgrades to it until he died with a whopping 512mb of RAM. Seriously his pc specs were a bragging factor like geek porn - better than any else's I ever saw including his I.T friends (he was an electrical engineer), everyone knew this apparently aside from his boss...

Auto-cad started becoming a thing and my father for the first time ever had a reason to actually do work on a computer, he immediately used the opportunity to leverage his company into paying for a pc. To get better "value" for the company he ordered the parts in place of a pre-built machine - in reality he blew 90% of the budget on a new motherboard and graphics card to upgrade his own pc and the cheapest entry level components for everything else. The day they arrived he upgraded his own pc, threw the excess parts into a box and told us it was our new computer which he would put together over the weekend. He didn't.

After 3 months of nagging I was fed up and taking liberties with him that landed me more than one hiding, at some point he was over it and told me if I wanted something that badly I should do it myself. He walked into my room after becoming concerned if I had run away/hurt myself since he hadn't heard a whistle from me in 6 hours and I was battling my ass off trying to install windows 98.

He inspected my assembly gave me an approving nod and showed me that the hard drives physical jumper was set to slave and the rest is history. I hadn't used windows before, or built a computer let alone used one in years but somehow I always knew, it just clicked and made sense to me.

I didn't truly recognise just how much I had learn't watching him play DOS games over his shoulder and clean/upgrade his pc. It changed everything and thanks to only being allowed to watch him use a pc, once I finally had access to my own computer again I revered it and all it's possibilities. I knew I should use it to do something special.

This may be obvious, but debugging is all about input / algorithm / output. If there's something wrong, it's one of the three. Work with the method of elimination. Sometimes it's easy, sometimes it's not.

I'll give you an example from my situation:

I wanted to play an old DOS game on my modern PC and so I used DosBox. I made an iso from the original CD, mounted it, referred to it in the game's mount settings and launched the game.

Then, after I had saved the game and I tried to load it again, the game would say: "Could not read/write savegame". And so I thought something was amuck with my mount settings and I started fiddling with those, but it only made it worse and it gave me more (cryptic) errors.
The next approach was to save a new game and load that one. Nope, same problem.
Finally I decided to follow a DosBox tutorial for the game and load the game again.. same problem. So I think hmm.. my algorithm is correct.. my output is wrong.. so then my input must be wrong. So I decided to save the game again with these new and correct settings and low and behold, it finally loaded.

One thing to note was that when it failed to load the savegame, it was because it had done a partial save because due to incorrect mount settings it couldn't figure out all the right config folders/files/paths and my savegame ended up being corrupt with 80% of the files having 0 Bytes, which was suspicious. That usually means a file became corrupt.

And then it hit me.. if the game says: "Could not read/write", that doesn't mean the same as "Could not access the file/folder". It could access it, it just couldn't parse it. And of course.. the 'write' part of the message indicates that it messed up in writing, causing it to misread. Sometimes you really have to think about it..

Anyway, input, algorithm, output. :)

I had my first config with a 286 CPU (dos only) machine when i was like 6.

My father brought the stuff in around midnight... i supposed to be sleeping already then...but it was my first fucking pc! Got so excited that
i was played the shit about a game called JBird like no tomorrow.

Had to upgrade it to a 486 dlc when win 3.1 released and some text editor's response time was over 10sec (for a letter or character to display on the screen from the point you pressed the button). Also it was needed to place a piece of paper between the two ram slots so it can recognize both ones. Seems funny with nowaday's hw and stuff.

It started when i was about 10 old.
My uncle showed me how to display something in dos-prompt using the echo command in a custom batch-file.
A few commands later, i was able to "program" a flip-book of an ascii ski-driver. Each ascii picture was separated by pressing any key and cls ^^
Aaaaah. Sweet childhood memories!

Later on i used a programming-language for beginners in windows.
This language gave you control of a triangle called "turtle".

My first high-level programming language was Delphi.
Since i had no idea of databases, i created a pseudo database of magic the gathering play-cards. Each card had it's very own windows formular filled up completely with an uncompressed image object displaying the chosen card modally. *sigh*
I scanned each card by using a feed scanner.
Finally, my application consisted of 200 cardimages and forced my PC to swap the required memory from my harddisk.
Boy o boy. I was such a noob! ^^

Over the years i discovered and felt in love with a lot of languages (jsp, java (script), c#, php, ...) and concepts (mvvm, mvc, clean-architecture, tdd, ...)! ;)

First computer I saw was an Apple II running Oregon Trail in grade school. Then I played computer games on my uncles Apple IIe. The first home video game I ever saw was Pong. It was a device you hooked to the RF input on the TV. It had 2 paddles to control the input (single axis controllers). The first game console I played on was the Atari. The first computer I programmed was on a black and white Macintosh. Then the other programmers in my high school told me the PC was better. Well, it was better for learning IMO. That was with Windows 3.0. But the programming was Turbo Pascal in DOS. DOS gave you complete control of the machine. Better at the time for me learning to do graphics and sounds programming. The first computer I bought was a 386 and I played with VR programming. Made my own joysticks using the limited joystick port. Fun times learning electronics and software together.

Why do you lil' shits keep making LAYERS and LAYERS of unnecessary abstraction and then call it goddamn progress???
Dude what the fuck is this UEFI shit?!
Why the hell do I NEED to import a frigging library and read tons of boring and overly complicated documentation just so I can paint a pixel on the screen now uh??
Alright alright yeah so the BIOS is a little basic but daaaamit son if you want something a bit more complicated you make it yourself or install an OS that provides it! Like we've been doing it for years!!!
Dude, you don't get to know what a file system is until I tell you!
The PC be like:
"You wanna dereference the 0x0 pointer? There you go: it's 0xE9DF41, anything else?
You wanna write to the screen? Ok I have a perfectly convinient interrupt setup for that.
Wanna paint a pixel yellow? Ok, just call this other interruption. Theere we go.
And it only took four bytes and a nanosecond to do it."

That shit works, and if you want something more complex, but not too much, that still runs efficiently install DOS.
Don't mess around with the hardware pleeease.
We can still understand what's going on down there. Once UEFI steps in, it'll be like sealing a door forever. Long live BIOS damn it all!

My first close encounter with a computer was with a came called "Skunny: Save our pizzas" in I think 1996 or 1997" and it used to run in dos.

And then next one that I remember was in 98/99 with my uncle ordering groceries on a PC. With a dial up modem.

I got my first machine in 2005 and the first game that I installed was Skunny: Save our pizzas.

I may need some ideas for a personal project in mind:
I plan to have a server that shall connect to a usb stick/device, the usb is plugged to a TV. The usb device can create its own local wifi network which provides CRUD on media files via REST. My own server should be accessible via the internet, but at the same time connect to the local usb wifi, once the usb wifi is available, and then send requests to it. Kind of a user-friendly bridge.
There's a PC near the device, almost always turned on. It's used by family members as regular office machine and could run a local server. What if as remotely accessible server? Then what about DOS attacks? (Would that "kill" the PC?)
An alternative would be a separate server. A raspberry pi? A dedicated server?