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MSX FPGA Hat

costarc·MSX_FPGA_Hat·Hardware Interface/MSX_FPGA_Hat.kicad_pcb

MSX FPGA Hat layout, top view — open source board by costarc

About the MSX FPGA Hat

MSX FPGA Hat is an open source PCB design by costarc, published on GitHub under the MIT license. It is a 2-layer board measuring 99.9 × 64 mm, with 40 components from 20 distinct parts.

Other key parts include the 74LVC245 and LM1117-3.3. By type, the board carries 13 capacitors, 11 resistors, 6 ICs, 4 connectors, 2 transistors and 1 switch.

It belongs with the retro computing and dev boards & breakouts designs in this gallery.

From the project

A Cartridge interface that converts MSX 5v signal levels to 3v, exposing an IDC connector for external devices that operates at 3v level.

Note: Current master branch not ready for fabrication due to major changes in the design. I am re-writing the new VHDL Top level design to demux the interface signals and exposed the MSX BUS according to the new interface changes (view v2.0 notes below).

V2.01 - incompatible with previous cores. - Removed U4OEn signal - this bus is not shared - can be grounded - Fixed some silk placement - Moved signals REFRESH,CS2 to own pins. This makes cores incompatible with version 2.0

Main components on the MSX FPGA Hat

74LVC245LM1117-3.3

MSX FPGA Hat bill of materials (BOM)

40 components, 20 distinct parts.

QtyPartRefs
5
74LVC245
U1, U2, U3, U4, U5
1
LM1117-3.3
U6
2
2N3904
Q1, Q2
1
Conn_01x03_Female
J1
1
Soundin
J2
1
AudioJack3
J3
1
/CS12
J4
1
MSX_BUS
CONN1
1
DE1 GPIO
IDC1
1
RESET
SW1
1
1N5817
D1
7
0.1uf
C1, C2, C3, C4, C5, C6, C8
3
10uF
C7, C10, C12
2
105
C9, C11
1
100uF
C13
4
10K
R1, R4, R5, R6
2
4K7
R2, R3
2
2K2
R7, R8
2
47
R9, R10
1
10K
RN1

MSX FPGA Hat design files

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

MSX FPGA Hat: common questions

How big is the MSX FPGA Hat?

The MSX FPGA Hat measures 99.9 × 64 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MSX FPGA Hat?

40 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the MSX FPGA Hat design files?

From the costarc/MSX_FPGA_Hat repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the MSX FPGA Hat design in my own project?

Yes, under the terms of its MIT license, which costarc chose for the repository.

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