Mark iii romcart
About the Mark iii romcart PCB
Mark iii romcart is an open source PCB design by barbeque, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 72 × 81.5 mm, with 8 components from 7 distinct parts.
Other key parts include the SG-1000-CART and SG-1000-EXPANSION. By type, the board carries 4 jumpers, 2 ICs, 1 switch and 1 capacitor.
It belongs with the retro computing designs in this gallery.
From the project
A homebrew Sega SG-1000, with an eye towards SC-3000 compatibility
Soggy-1000 is an open-source clone of the Sega SG-1000 home videogame system. The eventual goal of the project is to produce a copy of the SG-1000 main console, and the SK-1100 keyboard, so that the software made for the related Sega SC-3000 home computer can be preserved and enjoyed.
If you want to build and sell a handful of these systems to use up a "minimum board order," let me know. I'll probably be okay with it!
Main components on the Mark iii romcart
Mark iii romcart bill of materials (BOM)
8 components, 7 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SG-1000-CART 27C512 | DIP_Socket-28_W11.9_W12.7_W15.24_W17.78_W18.5_3M_228-1277-00-0602J | U1 |
| 1 | SG-1000-EXPANSION SG-1000-Cart | CartridgeEdge | U2 |
| 1 | Jumper_2_Bridged | SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1 |
| 1 | Jumper_2_Bridged | SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm | JP2 |
| 2 | Jumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3, JP4 |
| 1 | 679-2428 SW_SPDT | PinHeader_1x03_P2.54mm_Vertical | SW1 |
| 1 | 1276-1099-1 0.1µF | C_Disc_D6.0mm_W2.5mm_P5.00mm | C1 |
Mark iii romcart design files
The KiCad project lives in the barbeque/sg1000 repository on GitHub; these links point at the commit this page was built from.
Mark iii romcart: common questions
How big is the Mark iii romcart PCB?
The Mark iii romcart measures 72 × 81.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Mark iii romcart?
8 components, from 7 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Mark iii romcart design files?
From the barbeque/sg1000 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Mark iii romcart design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
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