

MD Mod
Another Mega Drive switchless MOD
- Size
- 20.3 × 20.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 15
- Pads
- 37
- Tracks, vias
- 53, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 3 Jul 2022
- Updated
- 4 Jul 2022
Overview
MD Mod is an open-source printed circuit board by screwbreaker, from the screwbreaker/MDmod repository on GitHub. It is a 2-layer board of 20.3 × 20.3 mm with 19 parts on 15 nets, routed with 53 tracks and 0 vias.
Its parts include 12 connectors, 1 capacitor, 1 resistor and 1 IC. It belongs with the retro computing and games boards and the PIC boards of this library.
README
PIC/README.mdMDmod PDK
Mega Drive switchless MOD for Padauk microcontroller

Summary
This mod is writted for the PIC16F630 microcontroller. This mod is written with the SDCC. Maybe the SDCC is not the best for PIC, but it do the job very well.
How to compile and program
This MOD must be compiled with SDCC. To program the micro I suggest the Minipro/XGecu programmer. But i'm sure it can be programmed with the PICKit.
To compile use the "--use-non-free" parameter. Or use the MAKEFILE in the firmware directory.
License
The PCBs are under the CERN OHL license. The firmwares, under the GPL3.
This is an OPEN project. So, like any other project like this, the hope is that others can improve it an reshare with the community. Don't go out this basic guideline.
Disclaimer
The hardware and the software are provided to you 'as is' and without any express or implied warranties whatsoever with respect to its functionality, operability or use, including, without limitation, any implied warranties of merchantability, fitness for a particular purpose or infringement. We expressly disclaim any liability whatsoever for any direct, indirect, consequential, incidental or special damages, including, without limitation, lost revenues, lost profits, losses resulting from business interruption or loss of data, regardless of the form of action or legal theory under which the liability may be asserted, even if advised of the possibility or likelihood of such damages.
Thanks
- The SDCC team.
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | Conn_01x01 | footprints:pad | J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | Jumper_3_Open | Jumper:SolderJumper-3_P2.0mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | OSHW | footprints:OSHW | V2 |
| 1 | PFS173-S14 | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | md img | footprints:md_pic | V1 |
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Questions
How big is the MD Mod PCB?
It measures 20.3 × 20.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MD Mod use?
19 parts. 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 MD Mod KiCad files?
From the screwbreaker/MDmod repository on GitHub, at the commit this page was made from: the board is PDK/MD_Mod.kicad_pcb and its schematic PDK/MD_Mod.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MD Mod design in my own project?
Its repository states no licence, so its author keeps all rights: ask screwbreaker before reusing the design.