├── .gitignore ├── .gitmodules ├── ISA_ES688-cache.lib ├── ISA_ES688-rescue.kicad_sym ├── ISA_ES688.kicad_pcb ├── ISA_ES688.kicad_pro ├── ISA_ES688.kicad_sch ├── ISA_ES688.pdf ├── README.md ├── docs ├── ESS688_Datasheet.pdf ├── LM3403N.pdf ├── NE558.pdf ├── YAC512_Yamaha.pdf ├── lm1877.pdf ├── ptd90-777943.pdf └── yamaha_ymf262.pdf ├── fp-lib-table ├── gerbers ├── rev_1.0.zip └── rev_1.1.zip ├── libraries └── custom_libs │ ├── custom_components.dcm │ ├── custom_components.lib │ └── footprints │ ├── Custom_Connectors.pretty │ ├── MNT_KEYSTONE_9200-3.kicad_mod │ ├── MNT_KEYSTONE_9200.kicad_mod │ ├── MNT_KEYSTONE_9204-1.kicad_mod │ └── SB_DB15_152-3415.kicad_mod │ ├── ES688_ISA8.pretty │ ├── SOP-16.kicad_mod │ ├── SOP-24.kicad_mod │ └── opl_logo.kicad_mod │ ├── ISA_DualUART.pretty │ └── Oscillator_DIP-14-8.kicad_mod │ ├── Package_QFP.pretty │ └── LQFP-14x20mm_P0.5mm.kicad_mod │ └── Volume_Pot.pretty │ └── PTD902.kicad_mod ├── pics └── rev_1.1_board.jpg └── sym-lib-table /.gitignore: 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