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ModestMapper

sverx·ModestMapper·KiCAD project files/modest_mapper.kicad_pcb

ModestMapper PCB layout, top view — open source board by sverx
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About the ModestMapper PCB

ModestMapper is an open source PCB design by sverx, published on GitHub. It is a 4-layer board measuring 66 × 39.3 mm, with 16 components from 6 distinct parts.

Other key parts include the SST39SF040, 74HCT574PW and 74HCT139PW. By type, the board carries 6 capacitors, 5 ICs and 5 resistors.

It belongs with the retro computing and usb & debug tools designs in this gallery.

From the project

the ModestMapper (based on doragasu's FrugalMapper) is an open low-cost rewritable (Flash based) cartridge for the SEGA Master System implementing a slot1 & slot2 SEGA mapper

the ModestMapper is an open low-cost rewritable cartridge for the SEGA Master System.

It's based on doragasu's FrugalMapper cartridge and shares many of its features:

- uses a Flash memory chip instead of ROM chips, thus being rewritable - uses only discrete logic chips, as few of them as possible - can be programmed and reprogrammed after having being assembled - supports up to 4 Mbit (512 KiB) but can use 2 Mbit (256 KiB) and 1 Mbit (128 KiB) Flash chips too (currently untested but the design allows for that)

Main components on the ModestMapper

SST39SF04074HCT574PW74HCT139PW

ModestMapper bill of materials (BOM)

16 components, 6 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SST39SF040
U1
2
74HCT574PW
U2, U3
2
74HCT139PW
U4, U5
5
100nF
C1, C2, C3, C4, C5
1
10uF
C6
5
4k7
R1, R2, R3, R4, R5

ModestMapper design files

The KiCad project lives in the sverx/ModestMapper repository on GitHub; these links point at the commit this page was built from.

ModestMapper: common questions

How big is the ModestMapper PCB?

The ModestMapper measures 66 × 39.3 mm, has 4 copper layers and is 1.600198 mm thick.

How many components are on the ModestMapper?

16 components, from 6 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 ModestMapper design files?

From the sverx/ModestMapper 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 ModestMapper design in my own project?

The repository has no license, so all rights stay with sverx. Use it as a reference, and ask the author before reusing the design.

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