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Mar2 quiz1-5
kl
7
Anatomy
Undergraduate 3
10/01/2009

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Cards

Term
What is the system bus bit depth of the GBA?
Definition
32 bits
Term
Which CPU does the GBA use?
Definition
16.8 MHz 32-bit ARM7TDMI with embedded memory
Term
For the GBA's color, there are bits for BGR. How many bits are for each color?
Definition
16 bit color value (each color limited to 5 bits)?
Term
Which hardware register do you change to force the display to go blank?
Definition
DISPCNT bit 7
Term
Which GBA color format values are the same?
Definition
mode 3 and mode 5
Term
When is it possible to allocate a 75KB video buffer in EWRAM?
Definition
When using video mode 3
Term
How do you set both the video mode and enable the background you want in the display control register?
Definition
SetMode(MODE_3 | BG2_ENABLE);
Kevin's long and complicated version:
#define MODETHREE 0x3
#define BACKGROUNDTWO 0x400
// Set memory to the video
memoryAddress = (unsigned short*)0x4000000
// sets the mode to mode three and background to background 2
*memoryAddress = (MODETHREE | BACKGROUNDTWO);
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