sap-plus
TomNisbet
Simple As Possible (SAP) 8-bit computer with a modular PCB design
Components (32)
| Reference | Value | Description |
|---|---|---|
| U1,U2 | 28C256 | |
| U3-U5 | 74LS138 | 3-to-8 line decoder/multiplexer inverting, DIP-16/SOIC-16/SSOP-16 |
| C1-C5 | 0.1uF | |
| D1 | ~{WA} | |
| D2 | ~{WB} | |
| D3 | ~{WO} | |
| D4 | ~{WP} | |
| D5 | ~{WR} | |
| D6 | ~{WS} | |
| D7 | ~{WD} | |
| D8 | ~{WM} | |
| D9 | ~{WI} | |
| D10 | ~{RA} | |
| D11 | ~{RB} | |
| D12 | ~{RL} | |
| D13 | ~{RP} | |
| D14 | ~{RR} | |
| D15 | ~{RS} | |
| D16 | ~{RD} | |
| D17 | SC | |
| D18 | CX | |
| D19 | BI | |
| D20 | FL | |
| D21 | N | |
| D22 | PI | |
| J1,J2 | Bus | |
| J4 | to Loader | |
| J5 | to Step Counter | Generic connector, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J6 | to Instruction Register | |
| RN1 | R_RED | 9 resistor network, star topology, bussed resistors, small US symbol |
| RN2 | R_GRN | 8 resistor network, star topology, bussed resistors, small US symbol |
| RN3 | R_BLU | 8 resistor network, star topology, bussed resistors, small US symbol |