Z80ctrl
About the Z80ctrl PCB
Z80ctrl is an open source AVR/Arduino PCB design by jblang, published on GitHub under the MIT license. It is a 2-layer board measuring 99.8 × 49.9 mm, with 30 components from 20 distinct parts.
Its main chip is the ATMEGA1284P-PU, from the AVR/Arduino family. Other key parts include the 74HCT139, 74HCT00 and MCP23S17. By type, the board carries 7 connectors, 7 capacitors, 6 resistors, 4 ICs, 3 diodes and 2 switches.
It belongs with the retro computing and wearables designs in this gallery.
From the project
AVR-based bootloader, I/O, and debugging for Z80-based computers
z80ctrl is an AVR-based bootloader, debugger, and I/O device for a Z80 retrocomputer with the following features:
- Plug-in module for RC2014 retrocomputer replaces the clock, serial, ROM, and CF boards - Runs CP/M software directly from FAT32-formatted SD Card - Boots unmodified disk images from the AltairZ80 emulator - Monitor with file management, memory inspector, and built-in Z80 disassembler - Single-step debugging, breakpoints, and watchpoints to trace Z80 bus activity in real-time - Expandable SPI bus allows bridging other SPI peripherals to the Z80 - Flexible MIT-licensed firmware…
Main components on the Z80ctrl
Z80ctrl bill of materials (BOM)
30 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HCT139 | DIP-16_W7.62mm_Socket | U1 |
| 1 | ATMEGA1284P-PU | DIP-40_W15.24mm_Socket | U2 |
| 1 | 74HCT00 | DIP-14_W7.62mm_Socket | U3 |
| 1 | MCP23S17 | DIP-28_W7.62mm_Socket | U4 |
| 1 | 20MHz | Crystal_HC49-4H_Vertical | Y1 |
| 1 | BUS | PinHeader_1x39_P2.54mm_Vertical | J1 |
| 1 | BUSEXT | PinHeader_1x23_P2.54mm_Vertical | J2 |
| 1 | ISP | PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | IOADDR | PinHeader_2x06_P2.54mm_Vertical | J4 |
| 1 | S1 S2 | PinHeader_2x06_P2.54mm_Horizontal | J5 |
| 1 | LINK | PinHeader_2x06_P2.54mm_Vertical | J6 |
| 1 | SD | PinHeader_2x09_P2.54mm_Vertical | J7 |
| 1 | RESET | SW_PUSH_6mm_H4.3mm | SW1 |
| 1 | HALT | SW_PUSH_6mm_H4.3mm | SW2 |
| 2 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D1, D3 |
| 1 | LED | LED_D3.0mm | D2 |
| 5 | .1uf | C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C4, C5, C6, C7 |
| 2 | 18pf | C_Disc_D3.0mm_W1.6mm_P2.50mm | C2, C3 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 5 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R5, R6 |
Z80ctrl design files
The KiCad project lives in the jblang/z80ctrl repository on GitHub; these links point at the commit this page was built from.
Z80ctrl: common questions
What microcontroller does the Z80ctrl use?
The Z80ctrl is built around the ATMEGA1284P-PU, from the AVR/Arduino family.
How big is the Z80ctrl PCB?
The Z80ctrl measures 99.8 × 49.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Z80ctrl?
30 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the Z80ctrl design files?
From the jblang/z80ctrl repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Z80ctrl design in my own project?
Yes, under the terms of its MIT license, which jblang chose for the repository.
Can I test firmware for the Z80ctrl without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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