ROM Hack Gradius 3 Memory Map Mode 21 (Hirom) Hack of Gradius III

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Gradius 3 Memory Map Mode 21 (Hirom) - Hack of Gradius III

Description:

This hack converts Gradius 3 Memory Map Mode 20 (Lorom) to Memory Map Mode 21 (Hirom). Memory Map Mode 20 (Lorom) is limited to the upper half of the banks. Memory Map Mode 21 (Hirom) can use the full banks or just the upper half of the banks just like Memory Map Mode 20 (Lorom). All asm code runs in the full banks, and all compressed data is uploaded from the full banks. Some data is loaded and stored to wram using the upper half of the banks...

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