novasaur
ajhewitt
Retrocomputer built from late-70's TTL logic chips
Components (85)
| Reference | Value | Description |
|---|---|---|
| Q1-Q3 | 2N3904 | |
| U1 | 74F86 | |
| U2 | 74F32 | |
| U3 | 74F11 | |
| U4,U5 | 74F139 | |
| U6,U37 | 74F157 | |
| U7 | 74F175 | |
| U8,U10,U11,U16,U17,U19,U22-U25,U31,U32,U34,U36 | 74F574 | |
| U9 | 74F138 | |
| U12 | GAL16V8 | |
| U13,U14,U28,U29 | 74F163 | |
| U15,U27,U30,U33 | 74F541 | |
| U18 | 74F257 | |
| U20 | 27C020 | |
| U21 | AS6C4008 | |
| U26 | 74F244 | |
| U35 | 74F299 | |
| U38 | CD4053 | |
| U39 | MAX232 | |
| U40 | NJM4580 | |
| U41 | BA50DD0WT | |
| BT1 | CR2032 | |
| C1-C10 | 0.1u | |
| C11,C13-C16,C19 | 2.2u | |
| C12 | 22u | |
| C17,C18 | 3300p | |
| D1 | LTL-10223W | |
| D2-D9 | BAT41 | |
| J1 | POWER IN | |
| J2 | KEYBOARD | |
| J3 | SERIAL | |
| J4 | DISPLAY | |
| J5 | GPU OUT | |
| J6 | AUDIO OUT | |
| J7-J10 | EXPANSION | |
| JP1 | FONT | |
| R1,R11,R14,R16,R17 | 180 | |
| R2-R8,R18-R20 | 10k | |
| R9,R12 | 750 | |
| R10,R13,R15 | 390 | |
| RN1,RN3-RN5 | 680 | |
| RN2 | 220/330 | |
| RN6 | R2R10k | |
| RV1 | 100k | |
| SW1 | POWER | |
| SW2 | RESET | |
| TP1 | BOOT | |
| TP2 | ALU | |
| TP3 | FETCH | |
| TP4 | HSEL | |
| TP5 | ~{READ} | |
| TP6 | ~{WRITE} | |
| TP7 | ~{DWE} | |
| TP8 | ~{DOE} | |
| TP9 | ~{ALUE} | |
| TP10 | ~{EXEC} | |
| TP11 | XCP | |
| TP12 | ~{XOE} | |
| TP13 | YCP | |
| TP14 | ECP | |
| TP15 | ~{BOE} | |
| TP16 | PCCP | |
| TP17 | ACP | |
| TP18 | ~{AOE} | |
| TP19 | PGCP | |
| TP20 | ~{PGOE} | |
| TP21 | HLCP | |
| TP22 | SCP | |
| TP23 | VENABLE | |
| TP24 | HBLANK | |
| TP25 | VCP | |
| TP26 | ~{VOE} | |
| TP27 | FCP | |
| TP28 | CLCP | |
| TP29 | CHCP | |
| TP30 | +8v | |
| TP31 | -8v | |
| TP32,TP34 | 0v | |
| TP33 | +5v | |
| TP35 | +6v | |
| TP36 | DCLK | |
| TP37 | MCLK | |
| TP38 | TCLK | |
| TP39 | TLD | |
| X1 | 33M |