├── .gitignore ├── README.md ├── doc ├── Assembly.md ├── BIOS.md ├── BOM.md ├── Compiling.md ├── FPGA_CPU_interface.md ├── Issues.md ├── PCB.md ├── README.md ├── SoundBlaster.md └── USB.md ├── fpga_pin_test ├── README.md ├── top.qpf ├── top.qsf ├── top.v ├── uart.v └── vdu.v ├── pcb ├── Gerber.zip ├── ep4f23_286_r2.lay6 ├── ep4f23_286_r2_2.lay6 ├── ep4f23_286_v2.pcb └── ep4f23_286_v2_m1.pcb ├── pictures ├── 1.png ├── 2.png ├── 3.png ├── 4.png ├── board.jpg ├── bottom.gif ├── cpu.png ├── pcad.jpg ├── sch1.png ├── top.gif ├── usb_nak.png └── usb_osc.jpg ├── sch └── README.md └── src ├── BIOS.qip ├── BIOS.v ├── BIOS_bb.v ├── Font.qip ├── Font.v ├── Font_bb.v ├── Main.qpf ├── Main.qsf ├── Main.v ├── Main86.qsf ├── PIC.v ├── PIT.v ├── PLL1.ppf ├── PLL1.qip ├── PLL1.v ├── PLL1_bb.v ├── PLLJ_PLLSPE_INFO.txt ├── PS2.v ├── Palette.qip ├── Palette.v ├── Palette_bb.v ├── SDRAM.v ├── SPI.v ├── SRAM.v ├── UART_tx.v ├── USB_LS_HID.v ├── USB_LS_PHY.v ├── VGA.v ├── VGARegs.qip ├── VGARegs.v ├── VGARegs_bb.v ├── _compile.bat ├── bios.mif ├── div32.v ├── ep4r86.qpf ├── fifo.qip ├── fifo.v ├── fifo_bb.v ├── firmware.mif ├── keyboard.mif ├── keyboard.qip ├── keyboard.v ├── keyboard_bb.v ├── pll2.ppf ├── pll2.qip ├── pll2.v ├── pll2_bb.v ├── quartusdir.bat ├── riscv-min-regs.v ├── riscv.v ├── riscv ├── compile.bat ├── config.h ├── lib │ ├── board.c │ ├── board.h │ ├── riscv.ld │ ├── syscalls.c │ └── vectors.S ├── main.c ├── program.bat ├── run.bat └── write.bat ├── riscv_min.v ├── riscv_min_regs.qip ├── riscv_min_regs.v ├── riscv_min_regs_bb.v ├── riscv_ram.qip ├── riscv_ram.v ├── riscv_ram_bb.v ├── serial_mouse.v ├── uart.v ├── usb_phy.v ├── usbram.qip ├── usbram.v ├── usbram_bb.v ├── vgafont.mif ├── ym3812-firmware.mif ├── ym3812.v ├── ym3812 ├── compile.bat ├── config.h ├── lib │ ├── board.c │ ├── board.h │ ├── riscv.ld │ ├── syscalls.c │ └── vectors.S ├── main.c ├── program.bat ├── run.bat └── write.bat ├── ym3812_firmware.qip ├── ym3812_firmware.v ├── ym3812_firmware_bb.v ├── 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