iGBA beta 3

I thank you for evaluating iGBA!

Disclaimer

GameBoy and GameBoy Advance are registered trademarks of Nintendo.
The author is in no way affiliated with Nintendo.
The author is in no way affiliated with any pirate group out there.
The author cannot and will not provide you with any GameBoy or GameBoy Advance games.
This software is supplied 'as-is' with no warranty, implied or otherwise. Whilst I make every attempt to make the software as free from bugs as possible, this is not guaranteed, and I will not be liable for any loss or damage directly or indirectly incurred through the use of this software.

What is iGBA ?

This program is my Gameboy Advance emulator. For the moment, it can run most of the GBA homebrewn demos.
The official site of iGBA is http://igba.multimania.com.
iGBA is designed mainly for the developers which do not have access to the official development kits of the GBA (like me).

How to Use iGBA ?

iGBA is designed to run on Windows9x/Me/NT/2000 with DirectX 3.

To start iGBA, just click on 'iGBA.exe'. Then you can choose a rom file. You can also associated GBA rom files to iGBA or drop a GBA rom file on 'iGBA.exe' icon.

What is emulated ?

CPU

ARM7TDMI CPU with ARM and THUMB opcode sets is 80% emulated in ARM Mode and 60% in THUMB mode.
CPU timings are not correct.

Memory

CPU Internal working RAM at addresses 0x03000000 (32kB).
CPU External working RAM at addresses 0x02000000 (256kB).
Gamepak ROM at address 0x08000000 mirrored at 0x0A000000 and 0x0C000000.
Gamepak RAM at address 0x0E000000 (64kB).
Cartridge flash ROM is not emulated.

Timers

Timer 0	OK
Timer 1	OK
Timer 2	OK
Timer 3	OK

DMA channels

DMA happens instantly. Repeating DMA are not yet emulated.

DMA0	NO
DMA1	NO
DMA2	NO
DMA3	OK

Joypad

Buttons are OK.
iGBA uses following key equivalents for GBA buttons:

GBA button	PC keyboard
A	SPACE
B	TAB
LEFT	A or Q
RIGHT	Z or W
SELECT	CTRL
START	ENTER
PAD UP	CURSOR UP
PAD DOWN	CURSOR DOWN
PAD LEFT	CURSOR LEFT
PAD RIGHT	CURSOR RIGHT

Images

Feature	Mode 0	Mode 1	Mode 2	Mode 3	Mode 4	Mode 5	OAM
Size & Shape	OK	NO	N/A	N/A	N/A	N/A	OK
Tile Flipping	OK	NO	N/A	N/A	N/A	N/A	OK
16/256-Colors Tiles	256 Only	NO	N/A	N/A	N/A	N/A	256 Only
Position offset (scrolling)	OK	NO	N/A	N/A	N/A	N/A	N/A
Mosaic mode	OK	NO	NO	OK	OK	NO	NO
Scale/Rotation	N/A	NO	NO	NO	NO	NO	NO
Windows	NO	NO	NO	N/A	N/A	N/A	NO
Color Effect	Alpha only	NO	NO	NO	NO	NO	NO

Sounds

No sound emulated.

Interrupts

No interrupt emulated.

BIOS

BIOS not emulated.