MC68000-first
About the MC68000-first PCB
MC68000-first is an open source PCB design by bobofet2-1, published on GitHub. It is a 2-layer board measuring 255.3 × 176 mm, with 59 components from 35 distinct parts.
Other key parts include the MC68681P, 68000D, LM555xN, 74LS373 and 74LS245. By type, the board carries 25 ICs, 16 resistors, 10 capacitors, 3 connectors, 2 crystals and 1 switch.
From the project
Code and design of legacy MC68000 proto board
Main components on the MC68000-first
MC68000-first bill of materials (BOM)
59 components, 35 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MC68681P | DIP-40_W15.24mm | IC1 |
| 1 | 68000D | DIP-64_W22.86mm | U1 |
| 1 | LM555xN | DIP-8_W7.62mm | U2 |
| 3 | 74LS373 | DIP-20_W7.62mm | U3, U4, U5 |
| 2 | 74LS245 | DIP-20_W7.62mm | U6, U7 |
| 2 | 74LS32 | DIP-14_W7.62mm | U8, U17 |
| 2 | 74LS04 | DIP-14_W7.62mm | U9, U10 |
| 2 | 74LS138 | DIP-16_W7.62mm | U11, U29 |
| 2 | 628128_DIP32_SSOP32 | DIP-32_W15.24mm | U12, U20 |
| 3 | 74LS00 | DIP-14_W7.62mm | U13, U25, U26 |
| 1 | 74LS08 | DIP-14_W7.62mm | U14 |
| 2 | 28C256 | DIP-28_W15.24mm | U15, U16 |
| 1 | EW20200YMY | PinHeader_2x08_P2.54mm_Vertical | U19 |
| 1 | 74LS05 | DIP-14_W7.62mm | U22 |
| 1 | DS12887 | DIP-24_W15.24mm | U31 |
| 1 | 16MHz | Crystal_HC49-U_Horizontal | Y1 |
| 1 | 3.6864 MHz | Crystal_HC49-U_Horizontal | Y2 |
| 1 | Conn_Coaxial_Power | BarrelJack_CUI_PJ-102AH_Horizontal | J1 |
| 1 | FT232RL board | PinHeader_1x06_P2.54mm_Vertical | J2 |
| 1 | DUART_OP_PORT | PinHeader_2x10_P2.54mm_Vertical | J3 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10K | Potentiometer_Bourns_3296W_Vertical | RV1 |
| 1 | reset | SW_PUSH_6mm | SW1 |
| 1 | LED | LED_0201_0603Metric_Pad0.64x0.40mm_HandSolder | D1 |
| 1 | 10nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C1 |
| 1 | 100n | C_Disc_D3.0mm_W2.0mm_P2.50mm | C2 |
| 1 | 10n | C_Disc_D3.0mm_W2.0mm_P2.50mm | C3 |
| 1 | 1u | C_Disc_D3.0mm_W2.0mm_P2.50mm | C4 |
| 4 | 15p | C_Disc_D3.0mm_W2.0mm_P2.50mm | C5, C6, C7, C8 |
| 1 | 10uF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C9 |
| 1 | 100nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C10 |
| 3 | 1M | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R7, R9 |
| 9 | 4.7K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R10, R11, R12, R13, R14 +1 |
| 2 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R8 |
| 1 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R16 |
MC68000-first design files
The KiCad project lives in the bobofet2-1/mc68k-proto-board repository on GitHub; these links point at the commit this page was built from.
MC68000-first: common questions
How big is the MC68000-first PCB?
The MC68000-first measures 255.3 × 176 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MC68000-first?
59 components, from 35 distinct parts. The full bill of materials is listed on this page.
Where can I download the MC68000-first design files?
From the bobofet2-1/mc68k-proto-board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MC68000-first design in my own project?
The repository has no license, so all rights stay with bobofet2-1. Use it as a reference, and ask the author before reusing the design.
