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maniekx86
All the sources (Schematics, PCB, VHDL, BIOS sources) for the M8SBC-486. This project is a 486 Homebrew computer, with some efforts to make it kinda PC compatible
| Reference | Value | Description |
|---|---|---|
| U1 | 486Socket | |
| U2 | XC2S100TQ144 | spartan 2 |
| U3,U4 | AMS1117 | 1A Low Dropout regulator, positive, adjustable output, SOT-223 |
| U5-U8,U19,U20 | 74LS245 | Octal BUS Transceivers, 3-State outputs |
| U9 | 8254 | Programmable Interval Timer, PDIP-24 |
| U10 | 8259A-2 | 8259, Programmable Interrupt Controller, PDIP-28 |
| U11-U18 | HM628512 |
| 524288-word × 8-bit High Speed CMOS Static RAM |
| U21 | W29C020 |
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| U22 | ATmega128L-8A | 8MHz, 128kB Flash, 4kB SRAM, 4kB EEPROM, JTAG, TQFP-64 |
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| U23 | 74LS573 | 8-bit Latch 3-state outputs |
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| C1,C2 | 22u | Polarized capacitor |
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| C3,C4,C7-C35,C40-C42 | 0.1u | Unpolarized capacitor |
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| C5,C6 | 22p | Unpolarized capacitor |
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| C36-C39 | 10u | Polarized capacitor |
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| D1 | PWR_LED | Light emitting diode |
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| D2 | D7_LED | Light emitting diode |
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| J1,J2 | Bus_ISA_16bit | 16-bit ISA-AT bus connector |
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| J3 | ATX-20 | ATX Power supply 20pins |
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| J4 | AVR ISP | Generic connector, double row, 02x03, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
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| J5 | FPGA JTAG | Generic connector, single row, 01x06, script generated |
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| J6 | Enable load | Generic connector, single row, 01x02, script generated |
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| J7 | RAM cacheable | Generic connector, single row, 01x02, script generated |
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| J8 | ROM cacheable | Generic connector, single row, 01x02, script generated |
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| J9 | CLKMUL SET | Generic connector, single row, 01x03, script generated |
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| J10 | ISA_DEBUG | Generic connector, single row, 01x10, script generated |
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| J11 | PEN | Generic connector, single row, 01x01, script generated |
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| J12 | MEM_WR_RD_J | Generic connector, single row, 01x02, script generated |
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| J13 | KB | 6-pin Mini-DIN connector |
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| J14 | ATMegaSpare | Generic connector, single row, 01x06, script generated |
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| J15 | PC SPK | Generic connector, single row, 01x04, script generated |
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| J16 | ATUART | Generic connector, single row, 01x03, script generated |
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| J17 | IOout | Generic connector, single row, 01x06, script generated |
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| J18 | Reset ext | Generic connector, single row, 01x02, script generated |
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| J19-J22 | Conn_01x02_Pin | Generic connector, single row, 01x02, script generated |
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| R1-R4 | 4.7K | Resistor |
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| R5-R7 | 120 | Resistor |
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| R8 | 200 | Resistor |
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| R9,R11-R13,R27,R28 | 10K | Resistor |
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| R10 | 33 | Resistor |
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| R14-R16,R19-R25 | 1K | Resistor |
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| R17,R18 | 300 | Resistor |
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| R26 | 100 | Resistor |
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| R29 | 10 | Resistor |
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| SW1 | SW_SPDT | Switch, single pole double throw |
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| SW2 | Reset btn | Push button switch, generic, two pins |
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| Y1 | TXC-7C | CMOS SMD Crystal Clock Oscillator, TXC |
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| Y2 | GTXO-14T | Crystal Clock Oscillator, DIP14-style metal package |
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| Y3 | 16MHz | Two pin crystal |
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