2 layers281.1 × 236.5 mm
MiniDrumkit2
Fihdi/MiniDrumkit
Eurorack DrumKit module with a 3 channel wave-file player and analog Hi-Hat and Kick Drum sections
239 parts15MIT
2 layers58.4 × 63.5 mm
MiSTer A8SIO
pmandes/MiSTer_A8SIO9Adapter for the SIO port to connect peripheral devices of the 8-bit Atari to the MiSTer FPGA.
- Size
- 58.4 × 63.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 25
- Pads
- 71
- Tracks, vias
- 153, 40
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Jan 2025
- Updated
- 26 Nov 2025
Overview
MiSTer A8SIO is an open-source printed circuit board by pmandes, from the pmandes/MiSTer_A8SIO repository on GitHub, published under the MIT licence. It is a 2-layer board of 58.4 × 63.5 mm with 16 parts on 25 nets, routed with 153 tracks and 40 vias.
It is built around the AMS1117-3.3 and BC857. Its parts include 8 connectors, 2 capacitors, 2 resistors, 1 IC and 1 transistor. It belongs with the retro computing and games and interfaces and adapters boards of this library.
Main components
2
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BC857
SOT-231 PNP 100MHz 100mA 15nA 200mW 45V 5V 650mV 800 PNP SOT-23 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
README
README.mdMiSTer_A8SIO
Adapter for the SIO port to connect peripheral devices of the 8-bit Atari to the MiSTer FPGA.
Interactive BOM:
Components
The following modules can be used to build an adapter without using SMD components:
- AMS 1117 3.3V stabiliser module
- 2 x 4ch level shifter module
- USB 3.0 Type A angled socket
- SIO socket
For basic functionality, one level shifter (mounted on J5/J6) and an LDO power supply module (mounted on J7/J8) are sufficient.
The MOTOR CTRL circuit for controlling the tape recorder is optional.
To connect to MisterFPGA, you need a USB3.0 A data transfer cable (blue type A plugs on both sides).
The adapter can ONLY be connected to the User Port on the I/O daughter board.
Prototype
The prototype was tested with the following equipment:
- Atari 1050 Floppy disk drive
- FujiNet network adapter
- SDriveMAX drive emulator
Changleog:
1.2
- fix: crossed lines from USB3 A-A cable
1.1
- prototype / not published
- 2 * 4ch level shifters modules instead of HW221
1.0
- initial project
PCB
Please consider supporting my open projects and order PCBs here: https://www.pcbway.com/project/shareproject/MiSTer_A8SIO_a2581e8f.html
Resources
New SIO sockets can be purchased here: http://sikorsoft.waw.pl/hardware/gniazda-sio/
3D printed SIO socket project: https://www.thingiverse.com/thing:5176832
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Conn_01x06_Socket | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J3, J4, J5, J6 |
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | 2k4 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | Conn_01x02_Socket | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J7, J8 |
| 1 | 500mA | Fuse:Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223 | U1 |
| 1 | BC857 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | SIO CONNECTOR | Atari:SIO | J2 |
| 1 | USB3_A | Atari:USB3_A | J1 |
The 15 most common of 16 parts.
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Questions
How big is the MiSTer A8SIO PCB?
It measures 58.4 × 63.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MiSTer A8SIO use?
16 parts, built around the AMS1117-3.3 and BC857. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the MiSTer A8SIO KiCad files?
From the pmandes/MiSTer_A8SIO repository on GitHub, at the commit this page was made from: the board is MiSTer_A8SIO/MiSTer_A8SIO.kicad_pcb and its schematic MiSTer_A8SIO/MiSTer_A8SIO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MiSTer A8SIO design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).