COMET
tomstorey
A highly integrated, small form factor Motorola 68000 based computer featuring "COM" ports and an "ET"hernet controller, and associated bits and pieces
Components (33)
| Reference | Value | Description |
|---|---|---|
| U1 | 74FCT16245 | Dual octal bus transceiver; 3-state |
| U2 | 74HCT245 | Octal bus transceiver; 3-state |
| U3-U6,U9 | 74HCT1G32 | Single 2-input OR gate |
| U7,U16 | 74HCT138 | 3-to-8 line decoder/demultiplexer; inverting |
| U8 | 74HCT688 | 8-bit magnitude comparator |
| U10 | ATF22V10C | |
| U11-U14 | 74LVC1G19 | 1-of-2 decoder/demultiplexer |
| U15,U20,U31 | 74LVC1G07 | Buffer with open-drain output |
| U17 | ATF16V8B | |
| U18 | 74LVC1G08 | Single 2-input AND gate |
| U19 | 74HCT74 | Dual D-type flip-flop with set and reset; positive edge-trigger |
| U21,U24,U27 | 74HCT273 | Octal D-type flip-flop with reset; positive-edge trigger |
| U22,U23,U28 | 74HCT373 | Octal D-type transparent latch; 3-state |
| U25 | 74HCT240 | Octal buffer/line driver; 3-state; inverting |
| U26 | 74HCT244 | Octal buffer/line driver; 3-state |
| U29,U30,U32 | 74LVC1G06 | Inverter with open-drain output |
| U33-U36 | 74HCT1G14 | Single Schmitt-trigger inverter |
| C1-C3 | 22uF | Polarized capacitor |
| C4-C18,C20-C27,C29,C36,C40 | 100nF | |
| C28,C30-C35,C37-C39,C41,C42 | 2.2nF | |
| D1 | IN_USE | |
| J1 | DIN41612_03x32_ABC_COMETbus | DIN41612 3x32 male connector with COMETbus signals |
| J2 | OFFSET | Generic connector, double row, 02x04, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J3 | IACK | Generic connector, double row, 02x04, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J4 | IRQ | Generic connector, double row, 02x04, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J5 | DB25_Printer | |
| JP1 | Jumper_2_Open | Jumper, 2-pole, open |
| JP2 | Jumper_2_Bridged | Jumper, 2-pole, closed/bridged |
| R1-R4,R19-R23,RN1-RN7 | 10K | 4 resistor network, parallel topology |
| R5 | 1K | |
| R6-R9 | 1K5 | |
| R10-R18 | 33R | |
| SW1 | BASE | 8x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol |