Nintendo Game Boy and Game Boy Color: use, maintenance, design, programming and emulation.
Questions tagged [game-boy]
66 questions
35
votes
3 answers
Why does the GameBoy Pocket produce a blue line on power off?
Ever since I first had my GameBoy Pocket, I've noticed that the line drawn across the screen at power off (which I'm guessing is because the CPU has stopped sending clock signals to the display driver, and it's still pumping a little power into the…
jameswilddev
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27
votes
3 answers
What does a Nintendo Game Boy do when turned on without a game cartridge inserted?
When a Nintendo Game Boy is turned on, it displays a logo read from the cartridge (looking like this) before starting the game. What does it display if there's no cartridge inserted from which to read the logo? And what happens after that?
cjs
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23
votes
5 answers
Why is the unchangable Nintendo Game Boy logo in the cartridge?
According to Gameboy [sic] Development Wiki page The Cartridge Header, locations 0x104 through 0x133 in the cartridge contain a bitmap of the Nintendo logo that's displayed when the Game Boy is turned on. (Presumably that's the "Nintendo®" text/logo…
cjs
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22
votes
2 answers
Did the Super Game Boy (1) run 2.5% or 4% faster than a Game Boy?
For years, I've heard "4%", repeated over and over. But then I read this today:
The original release of the Super Game Boy runs about 2.5% faster than an original Game Boy.
And the source is the people who made the hardware modification fix thing,…
Rogar E.
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10
votes
1 answer
What technological limitations required the "box" system in gen 1 Pokémon games?
In Pokémon Red/Blue (USA, I'm assuming in other gen 1 releases as well), you can carry 6 pocket monsters with you at once. Extra ones are stored in "boxes" on the computer. If you have 6 and catch a wild monster, it is sent to the box…
nexus_2006
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6
votes
2 answers
Game Boy Sound System Unused Memory Locations
I was looking at a memory map of the DMG-CPU-03 soundchip in the original Game Boy and noticed the memory at registers FF27 through FF2F are unused:
Name Addr 7654 3210 Function
-----------------------------------------------------------------
…
JAL
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4
votes
1 answer
When was the Game Boy Pocket released in Europe?
You'd think this would be the simplest thing in the world to find out, but Wikipedia and all other sources just mention the USA and Japan release dates -- not the European one. I have no idea why because I know for a 100% fact that they did release…
Baugham
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2
votes
3 answers
Game Boy save problem
I have an original Game Boy, and I know that saving is broken because Tetris won’t save my scores. How does saving work in Game Boy games, and are there any games that save without the use of the built-in save system?
Z3R0
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2
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2 answers
How is the LCDC (LCD Control) register manipulated on the Gameboy?
I don't see it listed anywhere in the 0000-ffff address space. Is it controled by the CPU? Or something else entirely?
dav
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