Inspired by the 45th anniversary of the IBM PC, I got my slopmachine cracking on a port of DONKEY.BAS to work in a browser. Pretty happy with the result. As a young person I remember being fascinated that you could make a game like this with so little code.
I haven’t looked at the code but the collision detection was buggy even back in the day. You have to switch lanes while there is nothing or a donkey in front of you. If the donkey is in the other lane it registers a hit even if it looks like you passed it
Edit: line 1750 is where it does a simple collision check and yep looks like it registers a collision without checking you’re past the donkey or not
Nice job. The sound effects are a bit too advanced because early IBM computers shipped with pretty simple, magnetically driven dynamic speakers.
On a related note, I’ve actually spent the last four months working on a 100% faithful adaptation of both QBasic and QuickBasic 4.5 that runs entirely in the browser on a virtual CPU and hardware abstraction layer. It’s a love letter to everyone who learned to program on Microsoft’s BASIC interpreters in the ’80s and early ’90s.
The best compliment I’ve received so far is from friends who grew up in the same era I did: when I fullscreen the browser, a few of them assumed it was a virtual machine running the real thing.
A QBasic port of the original BASIC-based DONKEY.BAS was one of the first programs I got running in it:
You used to be able to do surprising things with those old speakers using a timer interrupt: on an IBM XT it was possible to get 8kHz quality out of it, enough to make 4-channel MOD playback sound about as good as hearing it over a phone.
But your more typical use case was to play a single tone for some significant fraction of a second.
> early IBM computers shipped with pretty simple, magnetically driven dynamic speakers
Yes the PC & donkey.bas were monophonic design, but the PCjr shipped with 3-channel polyphonic sound plus a noise generator. It might have been capable of doing the sounds in this port of donkey that took “some liberties”. ;)
I remember some sound demos on the PC that emulated polyphonic sound by fast/audible switching between notes in a chord. Hey it seemed cool at the time. :P I just looked and couldn’t find any quickly enough but bumped into examples of even better true polyphony on the PC achieved by assembly hacking.
Ahhh I never saw donkey.bas, and only saw the Microsoft one. You know, when that company cared about being part of the industry, as opposed to being the entire industry, and really want to be 5 other industries to, as they do now.
Gorillas.bas (it's more or less like worms, except with only 1 gorilla per team)
It says something about what a thoughtful development environment these early BASICs were, that you could make a full simple little game like this in only 131 lines even though they're ostensibly far less powerful than modern languages. I'm not sure if you could even get an SDL window open and game loop running in 131 lines of (non-golfed) C.
Never mind how compact, beginner-friendly, and just plain fun they were to use. It's been said countless times but I'll say it again - we've lost something over the years.
Python is the modern Basic replacement, and also has similar fundamental design trade-offs. VB6 was the peak of the OLE/Multimedia paradigm, and was functionally replaced by the web browser script sandbox.
> we've lost something over the years.
Indeed, Information Appliances were never general-purpose computers. Some people used to care about that sort of thing, and left civilization the GNU compilers as one of the most important intellectual artifacts of our generation. =3
It was really cool! The ease of getting started was definitely one of the selling points for the “home computers” of that era (GW-BASIC ran on IBM compatible PCs instead, but the appeal of BASIC was the same). Brevity was an important feature since a lot of people obtained programs by typing them over from a magazine or recording them from the radio. And of course, there was no such thing as auto-complete (let alone AI generation).
That being said, SDL isn't actually that bad either. A minimal example is about 40 lines of code [1], not counting comments and blank lines, but including lines with just a curly brace which you could easily remove if you were concerned about size. A slightly more serious implementation of Snake runs about 345 lines of code [2].
And to be fair, DONKEY.BAS is also cheating slightly on the line metric by stuffing lines full of statements, like for example:
A$=INKEY$:IF A$=CHR$(27) THEN 1298 ELSE POKE 106,0:IF LEN(A$)>0 THEN LINE (CX,CY)-(CX+28,CY+44),0,BF:CX=252-CX:PUT (CX,CY),CAR%,PRESET:SOUND 200,1
>I'm not sure if you could even get an SDL window open and game loop running in 131 lines of (non-golfed) C.
The basics (window, events, renderer) can be done in about 30 lines:
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
static SDL_Window* window;
static SDL_Renderer* renderer;
int main(int argc, char* argv) {
SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO|SDL_INIT_GAMEPAD);
SDL_CreateWindowAndRenderer("test", 640, 480, SDL_WINDOW_RESIZABLE, &window, &renderer);
SDL_Event event;
while(true) {
while(SDL_PollEvent(&event) != 0) {
if (event.type == SDL_EVENT_QUIT) {
goto ENDGAME;
}
//events go here
}
// update here
SDL_SetRenderDrawColor(renderer,0,0,0,255);
SDL_RenderClear(renderer);
// render here
SDL_RenderPresent(renderer);
}
ENDGAME:
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
I don't think you could get all of donkey.bas done in 131 lines, though. SDL3 does ship with an embedded debug font but that seems like cheating. You probably couldn't replicate the drawing code easily, it would probably need to be faked with images, and you'd need a font atlas for the text.
I learned to program with BASIC. It was awful. I didn’t know how awful it was until many years later. So I don’t miss the language. But something I miss is how easy it was to learn what your machine was doing.
The DOS boot and config involved only two files: CONFIG.SYS and AUTOEXEC.BAT, that was it. Most programs were self-contained, so you could copy the directory to a floppy disk and run them on another machine. If you broke something, copy the files again and restart; that was it… I “broke” config and programs many times, and it was a good way to learn.
Back in the days you would buy printed magazines that contained full basic source code of programs and games and type them on your own text editor. I was a bit too young to do that but I remember watching my older brother just do that and then play games (after finding the typing errors for a while).
One small snag, when playing vs CPU the angle and velocity are set to whatever the CPU used. So I need to memorise my previous settings if I want to fine-tune my aim.
I remember hacking GORILLA.BAS code, which was on our office computers, to randomize gravity for my opponent, the result being they could not accurately predict where their bananas would go. I was an unbeatable legend for a while.
Someone gave my grandfather a Games BASICA floppy that had this and other games on it. But this copy had a few games that had been "modified". I remember in DONKEY.BAS, it would curse at you if you hit the donkey. "YOU STUPID SONOFABITCH". We thought it was hilarious. My grandfather was less pleased. He took it away from us when he found out.
Modifying those games were the first times I ever touched code! There was one that existed somewhere between DOS 2.0 and 3.2 that simply asked your name, then asked how the hell you got that name. It was maybe half a dozen lines, but easy enough to modify output and learn a bit about variables.
As a kid I modified DONKEY.BAS for my younger brother who wanted to play as a donkey avoiding cars. It was a clumsy modification, I didn't account for the differing size of the pseudo-sprites, but it made him happy.
For anyone unfamiliar with DONKEY.BAS: it’s notable for having been co-written by Bill Gates. More info on its history bere: https://en.wikipedia.org/wiki/DONKEY.BAS
tangential: I still remember how disappointed I was in PCs being used to a C64 (which was released in 1982) The quality of the games & sound effects was just not on the same level (C64 being much more advanced)
PC was a clear winner for RPGs, adventure games, and wargames/strategy, even in the early days of PC/XT. Anything that could make use of more RAM and disk, while also not demanding too much of graphics or audio, was great on PC.
That has all the hall marks of urban legend, but why let the truth get in the way of a great story.
I have said it for a very long time, Gates wasn't innovative in technology but he absolutely innovated in bringing the most ruthless business practices into software.
This is what got me into programming. When I was a kid, I had a shitty 386 because my father got a computer second hand from a friend (we were poor). I was playing the game and then pressed a key and it took me to the basic editor. I was confused with what I saw and started changing things. I changed a number and the size of the explosion on the banana got bigger. My best friend at the time went to computer camp and explained to me that it was code. 30 years later I'm still programming.
The game theory is all wrong, this is a cooperative game, either they both win or both lose. I don't see how the Donkey getting hit by a car should be classified as "Donkey wins"
Not tongue in cheek, but called that to distinguish it from ROM BASIC. AFAIK, Advanced BASIC had to be loaded from the DOS disk and mostly added disk management and graphics features.
62 comments
[ 43.0 ms ] story [ 1084 ms ] thread- https://gorillas.zone
- https://codepen.io/manz/pen/RmEQgv
- https://github.com/rizwan-virani/gorillas
- https://github.com/theraccoonbear/BrowserGORILLAS.BAS
For 131 lines?
OSX, Firefox, browser size 3326×2830 pixels. Only happens at or around that particular size - resizing the window fixes the issue.
Edit: line 1750 is where it does a simple collision check and yep looks like it registers a collision without checking you’re past the donkey or not
Happy 45th Birthday to the IBM PC and Model F/XT
https://news.ycombinator.com/item?id=49280103
On a related note, I’ve actually spent the last four months working on a 100% faithful adaptation of both QBasic and QuickBasic 4.5 that runs entirely in the browser on a virtual CPU and hardware abstraction layer. It’s a love letter to everyone who learned to program on Microsoft’s BASIC interpreters in the ’80s and early ’90s.
The best compliment I’ve received so far is from friends who grew up in the same era I did: when I fullscreen the browser, a few of them assumed it was a virtual machine running the real thing.
A QBasic port of the original BASIC-based DONKEY.BAS was one of the first programs I got running in it:
https://mordenstar.com/share/qbasic-core-demos
But your more typical use case was to play a single tone for some significant fraction of a second.
How far does the HAL go? Screen 12 and 13, and writing directly to VRAM? WAIT for vsync? Call absolute for mouse usage?
Yes the PC & donkey.bas were monophonic design, but the PCjr shipped with 3-channel polyphonic sound plus a noise generator. It might have been capable of doing the sounds in this port of donkey that took “some liberties”. ;)
I remember some sound demos on the PC that emulated polyphonic sound by fast/audible switching between notes in a chord. Hey it seemed cool at the time. :P I just looked and couldn’t find any quickly enough but bumped into examples of even better true polyphony on the PC achieved by assembly hacking.
https://en.wikipedia.org/wiki/Arpeggio
Many of my favorite chiptunes use this technique.
Gorillas.bas (it's more or less like worms, except with only 1 gorilla per team)
On the plus side: it was much prettier.
Never mind how compact, beginner-friendly, and just plain fun they were to use. It's been said countless times but I'll say it again - we've lost something over the years.
> we've lost something over the years.
Indeed, Information Appliances were never general-purpose computers. Some people used to care about that sort of thing, and left civilization the GNU compilers as one of the most important intellectual artifacts of our generation. =3
That being said, SDL isn't actually that bad either. A minimal example is about 40 lines of code [1], not counting comments and blank lines, but including lines with just a curly brace which you could easily remove if you were concerned about size. A slightly more serious implementation of Snake runs about 345 lines of code [2].
And to be fair, DONKEY.BAS is also cheating slightly on the line metric by stuffing lines full of statements, like for example:
1. https://examples.libsdl.org/SDL3/renderer/01-clear/ 2. https://examples.libsdl.org/SDL3/demo/01-snake/The basics (window, events, renderer) can be done in about 30 lines:
I don't think you could get all of donkey.bas done in 131 lines, though. SDL3 does ship with an embedded debug font but that seems like cheating. You probably couldn't replicate the drawing code easily, it would probably need to be faked with images, and you'd need a font atlas for the text.I learned to program with BASIC. It was awful. I didn’t know how awful it was until many years later. So I don’t miss the language. But something I miss is how easy it was to learn what your machine was doing.
The DOS boot and config involved only two files: CONFIG.SYS and AUTOEXEC.BAT, that was it. Most programs were self-contained, so you could copy the directory to a floppy disk and run them on another machine. If you broke something, copy the files again and restart; that was it… I “broke” config and programs many times, and it was a good way to learn.
He was involved in setting up the radar systems at Pearl Harbor, much good that did.
I have said it for a very long time, Gates wasn't innovative in technology but he absolutely innovated in bringing the most ruthless business practices into software.
https://github.com/victorqribeiro/carGamePerceptron
https://youtu.be/kmCMkD1vv0E?si=RqGhqIC-EHVhXnDI&t=145
EDIT: That must be the easter egg mentioned in the repo.
TIL there is an “Advanced Basic”. I hope the naming was tongue in cheek.