Taming Memory in PlayBasic with the AMA Library

When you’re writing games or tools in PlayBasic, performance isn’t just about the flashy stuff you see on screen. Behind the scenes, the way you manage memory can make or break your frame rate — and your sanity.

That’s where my Array Memory Allocation (AMA) library comes in. It’s a home-grown system that manages all your allocations inside a single, giant array. Think of it like having a huge storage unit that you divide into smaller lockers for your stuff, instead of renting a new storage unit every time you buy a box of cables.

The Problem with Dynamic Memory

PlayBasic, like most high-level languages, can allocate arrays and memory chunks on the fly. That’s fine for occasional use, but when you’re doing hundreds or thousands of small allocations in a game loop, it can become painfully slow.

The original inspiration for AMA came from some old DarkBasic code I wrote years ago. It worked, but it had some ugly performance quirks — I’m talking seconds-long delays for just a few hundred allocations. Not great when you’re trying to keep your game running at 60 FPS.

The AMA Approach

The AMA library flips the normal approach on its head:

🔍 Is XOR Decryption in PlayBASIC as Fast as Assembly?

Every now and then, a forum question pops up that really catches my attention — and this one did just that. A PlayBASIC user recently asked:

> "Is using XOR decryption when loading media from memory in PlayBASIC as fast as doing it in assembly?"

At first, I was a little puzzled. Why? Because the function in question is written in assembly — it's already doing exactly what the user thought might be a separate optimization path. So, let's unpack what's really going on behind the scenes when you XOR encrypted media in memory using PlayBASIC.

🔐 XOR Media Loading: A Quick Recap

Years ago, PlayBASIC added support for loading media directly from memory. Earlier versions relied on external packer tools to encrypt and wrap media, but these days, you can load and decode encrypted content entirely from within your program.

The basic workflow is:

1. 1. Load your file into memory.
2. 2. Call the `XORMemory` function with a key.
3. 3. The content is decrypted and ready to use.

You can use any XOR key you like. While XOR encryption is relatively simple and easily reversible, it’s still useful for basic protection against casual asset ripping.

🧠 What Happens Internally?

When you call `XORMemory`, PlayBASIC doesn’t interpret the data — it pushes the work down to the engine’s internal rendering system. Specifically, it uses the XOR ink mode inside the `Box` drawing function.

This function writes color data onto a surface by XOR’ing it with the existing pixels. Here’s what makes it cool: that surface isn’t necessarily a visible screen — it's just treated as raw memory.

To decrypt, the engine:

🎮 Game Dev and the Rockstar Illusion

At some point, many aspiring game developers ask the same question:

"Should I pursue game development as a career?"

It’s a fair question — and one I’ve heard dozens of times over the years. My usual answer goes something like this:

 Game development, for many of us, is the modern-day rockstar path. The huge potential upsides suspend people’s disbelief. Sheer optimism draws people into making life-changing career decisions on flimsy grounds.

And I still stand by that.

The Seductive Myth

There’s a dream attached to game development that’s hard to shake.

Make a hit indie game. Build a loyal community. Quit your day job. Maybe even go viral and rake in millions. We've all seen it happen. Stardew Valley. Undertale. Minecraft. Those stories are real — and they’re incredibly inspiring.

But here’s the thing: they’re not the rule. They’re the outliers. The exceptions. The lottery wins.

The Reality Check

Making software is difficult.

Making successful software? Even harder.

Now try making a successful game in one of the most oversaturated creative markets on the planet.

It’s not just about writing code or drawing sprites. It’s game design, storytelling, marketing, community building, testing, patching, supporting — usually with limited time, resources, or income. Even with passion and dedication, a great game can vanish in the noise of the marketplace.

This isn’t meant to scare you off — but it is meant to snap the illusion. Because game development isn’t a shortcut to fame or fortune. It’s work. Deep, complex, and often unpredictable work.

Why Do It Then?

Because you love it. Because it fascinates you. Because making something interactive — something playable — is uniquely satisfying.

For many of us, that’s reason enough. But the key is understanding that passion alone isn’t a business model. The most sustainable developers I know treat game dev like a long game. They build skills slowly. They wear many hats. They take breaks. They fail, adapt, and keep going.

Career vs. Calling

You can make a career in game development — but go in with your eyes open.

Ask yourself: