jotego / Jt89
Licence: gpl-3.0
sn76489an compatible Verilog core, with emphasis on FPGA implementation and Megadrive/Master System compatibility
Stars: ✭ 14
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JT89 FPGA Clone of sn76489an hardware by Jose Tejada (@topapate)
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sn76489an compatible Verilog core, with emphasis on FPGA implementation and Megadrive/Master System compatibility.
This project aims to make a Verilog core that will:
- Produce signed output waveforms, with no DC offset
- Produce accurate volume
- Have volume limiting like reportedly Master System had
- Different volume settings for noise channel as reported
- Test if Megadrive 2 version had different volume and apply it
- Reported variations on noise signal length
- Use one single clock for all registers, making it easy to synthesize and constraint on FPGAs
- It will fit well with JT12 (https://github.com/jotego/jt12) in order to produce the Megadrive sound system
- Have separate output channels, so they can be mixed using the interpolator before the sigma-delta DAC
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