Um...do you mean TS2 board? A TS4 is a real GBA (release version) attached
to the dev station. A TS2 is a circuit board with an LCD.
The TS2 does have some defects, which you can find info about on Nintendo's
developer site. If you are using a TS2, I strongly recommend you read up on
these differences instead of accounting for the differences in code/art.
Just Me,
*SF