A clever person has hacked/reprogammed Gradius III for the SNES to take advantage of the 'SA1' enhancement chip. So if you use the hacked version with an emulator or an Everdrive that supports the 'SA1' chip, you will get to experience the game with far less slowdown.
The SA1 features a range of enhancements over the standard CPU:
So you can appreciate how much of a boost in performance Gradius III now has.
Go here for more details: https://arstechnica.com/gaming/2019/...s-gradius-iii/
The SA1 features a range of enhancements over the standard CPU:
- 10.74 MHz clock speed, compared to the 5A22's maximum of 3.58 MHz
- Faster RAM, including 2KBytes of internal RAM
- Memory mapping capabilities
- Limited data storage and compression
- New DMA modes such as bitmap to bit plane transfer
- Arithmetic functions (multiplication, division, and cumulative)
- Hardware timer (either as a linear 18-bit timer, or synchronised with the PPU to generate an IRQ at a specific H/V scanline location)
So you can appreciate how much of a boost in performance Gradius III now has.
Go here for more details: https://arstechnica.com/gaming/2019/...s-gradius-iii/
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