68000
About the 68000 PCB
68000 is an open source PCB design by jefftranter, published on GitHub. It is a 2-layer board measuring 134.6 × 208.3 mm, with 90 components from 30 distinct parts.
Other key parts include the 555, 8 MHz, 74LS00, 74LS06 and 74LS04. By type, the board carries 42 capacitors, 37 ICs, 9 resistors, 1 crystal and 1 diode.
It belongs with the retro computing and usb & debug tools designs in this gallery.
From the project
Code related to the Motorola 68000 microprocessor.
This is a Kicad project for the Teesside TS2 single board computer from the book "Microprocessor Systems Design - 68000 Hardware, Software, and Interfacing", third edition, by Alan Clements.
This is a modified version that simplifies the design by removing circuitry that is not needed for operation as a single board computer. Specifically, removed was:
- backplane interface and associated buffering.
Main components on the 68000
68000 bill of materials (BOM)
90 components, 30 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 555 | DIP-8_W7.62mm | U1 |
| 1 | 8 MHz | DIP-14_W7.62mm | U2 |
| 3 | 74LS00 | DIP-14_W7.62mm | U3, U34, U37 |
| 1 | 74LS06 | DIP-14_W7.62mm | U4 |
| 1 | 74LS04 | DIP-14_W7.62mm | U5 |
| 1 | 68000 | DIP-64_W22.86mm | U6 |
| 1 | 74LS08 | DIP-14_W7.62mm | U7 |
| 3 | 74LS32 | DIP-14_W7.62mm | U8, U9, U10 |
| 4 | HM6264 | DIP-28_W15.24mm | U11, U13, U15, U17 |
| 4 | 28C64 | DIP-28_W15.24mm | U12, U14, U16, U18 |
| 1 | 74LS20 | DIP-14_W7.62mm | U19 |
| 3 | 74LS74 | DIP-14_W7.62mm | U20, U23, U35 |
| 2 | 74LS161 | DIP-16_W7.62mm | U21, U22 |
| 2 | 74LS260 | DIP-14_W7.62mm | U24, U25 |
| 4 | 74LS138 | DIP-16_W7.62mm | U26, U27, U32, U33 |
| 1 | 74LS148 | DIP-16_W7.62mm | U28 |
| 2 | 6850 | DIP-24_W15.24mm | U29, U30 |
| 1 | 74HC4060 | DIP-16_W7.62mm | U31 |
| 1 | 74LS27 | DIP-14_W7.62mm | U36 |
| 1 | 2.4576MHz | Crystal_HC49-U_Vertical | Y1 |
Show 10 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1N5404 | Diode_DO-35_SOD27_Horizontal_RM10 | D3 |
| 38 | 0.1uF | C_Disc_D3_P2.5 | C1, C2, C5, C6, C7, C8, C9, C10 +30 |
| 1 | 0.47uF | C_Disc_D12_P7.75 | C3 |
| 1 | 100uF | C_Radial_D5_L6_P2.5 | C4 |
| 2 | 22pF | C_Disc_D3_P2.5 | C39, C40 |
| 2 | 1M | Resistor_Horizontal_RM7mm | R1, R4 |
| 1 | 470 | Resistor_Horizontal_RM7mm | R6 |
| 1 | 10M | Resistor_Horizontal_RM7mm | R20 |
| 1 | 330 | Resistor_Horizontal_RM7mm | R25 |
| 4 | 4.7K | Resistor_Array_SIP8 | RR1, RR2, RR3, RR4 |
68000 design files
The KiCad project lives in the jefftranter/68000 repository on GitHub; these links point at the commit this page was built from.
- LayoutTS2/v2.1/ts2.kicad_pcb
68000: common questions
How big is the 68000 PCB?
The 68000 measures 134.6 × 208.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 68000?
90 components, from 30 distinct parts. The full bill of materials is listed on this page.
Where can I download the 68000 design files?
From the jefftranter/68000 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the 68000 design in my own project?
The repository has no license, so all rights stay with jefftranter. Use it as a reference, and ask the author before reusing the design.
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