IO Board
About the IO Board
IO Board is an open source PCB design by stevegg, published on GitHub. It is a 2-layer board measuring 99.8 × 99.8 mm, with 13 components from 12 distinct parts.
Other key parts include the GAL16V8 and 68681. By type, the board carries 6 connectors, 4 capacitors, 2 ICs and 1 transistor.
It belongs with the retro computing designs in this gallery.
From the project
Single Board 68k Computer
This is my extremely simple 68000 single board computer. It has 512k of ROM and 512k of RAM.
I'm building this to learn the fundamentals of microprocessors and their use in computer systems. Modern day computers are complex and require specific supporting chip sets. These retro processors were simple and much easier to understand but in the end the principles are the same.
Main components on the IO Board
IO Board bill of materials (BOM)
13 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | GAL16V8 | DIP-20_W7.62mm_Socket_LongPads | U1 |
| 1 | 68681 | DIP-40_W15.24mm_Socket_LongPads | U2 |
| 1 | 3.6864MHz | Crystal_HC49-4H_Vertical | Q1 |
| 1 | Conn_02x32_Odd_Even | PinHeader_2x32_P2.54mm_Horizontal | J1 |
| 1 | Serial A | PinHeader_1x06_P2.54mm_Vertical | J2 |
| 1 | Serial B | PinHeader_1x06_P2.54mm_Vertical | J3 |
| 1 | DEBUG | PinHeader_1x09_P2.54mm_Vertical | J4 |
| 1 | Duart IP | PinHeader_1x08_P2.54mm_Vertical | J5 |
| 1 | Duart OP | PinHeader_1x06_P2.54mm_Vertical | J6 |
| 2 | .1uF | C_Disc_D3.4mm_W2.1mm_P2.50mm | C1, C2 |
| 1 | 15pf | C_Disc_D3.4mm_W2.1mm_P2.50mm | C3 |
| 1 | 5pf | C_Disc_D3.4mm_W2.1mm_P2.50mm | C4 |
IO Board design files
The KiCad project lives in the stevegg/Steve-68k repository on GitHub; these links point at the commit this page was built from.
- LayoutIO Board/IO Board.kicad_pcb
- SchematicIO Board/IO Board.kicad_sch
IO Board: common questions
How big is the IO Board?
The IO Board measures 99.8 × 99.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the IO Board?
13 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the IO Board design files?
From the stevegg/Steve-68k repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the IO Board design in my own project?
The repository has no license, so all rights stay with stevegg. Use it as a reference, and ask the author before reusing the design.
More boards in Steve-68k
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