The uMSX is a MSX2+ FPGA implementation that basically mimics the 1ChipMSX (one of the first FPGA based MSX2+ one chip MSX computers commercially available).
PCB created by BCH.
The VHDL used is the well known KDL PLD implementation for the MSX2+ used by the vast majority of the FPGA based MSX computers known. The uMSX uses the first generation of the KDL VHDL source, also known by esemsx.
Based on the already obsolete (but relatively easy to find) Altera EP1C12 FPGA (specifically the EP1C12Q240C8N), the uMSX uses SMD based components (and a few PTH) in a nice compact form factor. It uses the 4 megabit EPCS4 active serial configuration flash memory to host the firmware and configure the FPGA chip at each time the circuit turns on.
A MT48LC16M16A2 SRAM chip offers memory for the computer, which also uses a few other components to implement the clock logic (NC7WV04P6X inverter and 21.47727 basic PTH crystal oscillator) and a 953B voltage detector and reset IC.
Heavily based on 0603 SMT resistance arrays, and other 0805 SMT components, the uMSX is a compact little OCM MSX that can be used to evolve your SMD soldering skills, challenge your knowledge of modern electronics applied to retro computing, and give you a lot of fun through the journey.
| Qtd | Part | Value | Package | Type | Link |
|---|---|---|---|---|---|
| 1 | uMSX main board PCB | NA | NA | NA | Main Board |
| 1 | Custom acrylic box | NA | NA | NA | Acrylic Box |
| 3 | Nylon pcb standoff | 20mm | M3 | Black | AliExpress |
| 7 | Nylon screw | 10mm | M3 | Black | AliExpress |
| 2 | R106, R96 | 10R | M0805 | SMD Resistor | AliExpress |
| 1 | R113 | 22R | M0805 | SMD Resistor | AliExpress |
| 2 | R4, R6 | 100R | M0805 | SMD Resistor | AliExpress |
| 1 | R7 | 1M | M0805 | SMD Resistor | AliExpress |
| 2 | R8, R10 | 10K | M0805 | SMD Resistor | AliExpress |
| 3 | R13A, R13B, R122 | 1K | M0805 | SMD Resistor | AliExpress |
| 26 | RN133, RN97-101, RN103, RN105, RN108, RN110, RN112, RN114-121, RN123, RN126-127, RN129, RN131, RN135, RN152 | 100R | 0603x4 CAY16 | SMD Resistor Array | AliExpress |
| 8 | RN95, RN107, RN109, RN124, RN128, RN130, RN132, RN134 | 200R | 0603x4 CAY16 | SMD Resistor Array | AliExpress |
| 5 | RN16, RN111, RN125, RN12, RN13 | 1K | 0603x4 CAY16 | SMD Resistor Array | AliExpress |
| 1 | RN94 | 10K | 0603x4 CAY16 | SMD Resistor Array | AliExpress |
| 1 | C1 | 2.2uf | C0805 | SMD Ceramic Capacitor | AliExpress |
| 23 | C3-10, C13-15, C21, C23-25, C30-33, C35-37, C134 | 100nf | C0805 | SMD Ceramic Capacitor | AliExpress |
| 2 | C18-19 | 27pf | C0805 | SMD Ceramic Capacitor | AliExpress |
| 8 | C26-28, C18-19, CI10-11, CI16 | 220uf 10V | 153CLV-0605 | SMD Electrolytic Capacitor | AliExpress |
| 1 | C34 | 4.7uf | C0805 | SMD Ceramic Capacitor | AliExpress |
| 9 | LED1-9 | Any color | CHIP-LED0805 | SMD LED | AliExpress |
| 1 | 12V | 1x2 | 12v pin to the cartridge board | Pin Header | AliExpress |
| 1 | JP1 | 2x5 | joystick connector | Pin Header | AliExpress |
| 1 | JP2 | 1x2 | on/off switch | Pin Header | AliExpress |
| 1 | JP3 | 2x25 | cartridge board connector | Pin Header | AliExpress |
| 1 | JP4 | 2x5 (10 pin) | JTAG | Box Header Connector | AliExpress |
| 1 | JP5 | 3.5mm | Stereo | Audio Jack | AliExpress |
| 1 | PS2 | 6P | keyboard connector | PS2 | AliExpress |
| 1 | Q1 | 21.47727 | HC49/S | PTH Crystal Oscillator | AliExpress |
| 1 | U1 | EPCS4N | 8-pin SOIC | Active Serial configuration flash | AliExpress |
| 1 | U2 | 953BFP | 8-pin SOIC | Voltage detector and reset | AliExpress |
| 1 | U$1 | EP1C12Q240C8N | 240-Pin PQFP | Cyclone FPGA | AliExpress |
| 1 | J1 | Micro SD Slot | AliExpress | ||
| 1 | J2 | DC-005 | Right Angle | Barrel Power Jack | AliExpress |
| 1 | IC1 | MT48LC16M16A2 | TSOP54-400 | SDRAM | AliExpress |
| 1 | IC2 | 3.3v AMS1117 | SOT223 | Voltage Regulator | AliExpress |
| 1 | IC3 | 1.5v AMS1117 | SOT223 | Voltage Regulator | AliExpress |
| 1 | IC5 | NC7WZU04P6X | SOT65P210X110-6AN_SC88_SC70-6 | Dual Unbuffered Inverter | AliExpress |
| 1 | RCA | AV-8.4-5 | RCA | RCA Connector | AliExpress |
| 1 | F1 | 1.1A | 1812 | PPTC Fuse | AliExpress |
| 1 | EDG-08 (SWITCH) | 8 switches | AliExpress | ||
| 1 | S1 (Button) | 6x6x7 | Push/Tactile | Reset Button | AliExpress |
| 1 | VGA | DB15 | FEMALE SHORT | RIGHT ANGLE | AliExpress |
| 1 | ON/OFF switch | 2 pin | 21x15 | Boat switch | AliExpress |
| 2 | Jumper wire | Female | 10cm | ON/OFF cables | AliExpress |
| 2 | Spade Crimp Terminals and Sleeves | Female | 4.8mm | (Buy the set) | AliExpress |
| 1 | Socket Connector | Female | 2.54MM Pitch | Joystick cable connector | AliExpress |
| 1 | Flat Ribbon Cable | 10P (10 pins) | Joystick cable | AliExpress | |
| 1 | DB9 male connector | 9 pin | Joystick cable connector | AliExpress | |
| 1 | microSD/TF card | 4GB | Memory card | AliExpress |
| Qtd | Part | Value | Package | Type | Link |
|---|---|---|---|---|---|
| 1 | uMSX cartridge board PCB | NA | NA | NA | Cartridge Board |
| 1 | TMA_0512D | 12V | AliExpress | ||
| 2 | Inductor | 100uf | PTH | AliExpress | |
| 2 | Electrolytic Capacitor | 10uf/25V | 153CLV-0605 | SMD | AliExpress |
| 1 | Electrolytic Capacitor | 100uf/16V | 153CLV-0605 | SMD | AliExpress |
| 3 | Ceramic Capacitor | 100nf | C0805 | SMD | AliExpress |
| 2 | Ceramic Capacitor | 4.7uf | C0805 | SMD | AliExpress |
| 2 | Resistor | 2K | M0805 | SMD | AliExpress |
| 1 | Main board connector | 2x25 | Pin Header | AliExpress | |
| 2 | Edge card connector | 50P | Cartridge | AliExpress | |
| 4 | PCB metal standoff | 15-20mm | M3 | Standoff | AliExpress |
| 4 | Silicone cap | 13mm | M3 | Sleeve/cap | AliExpress |
| 4 | Nut | M3 | Nut | AliExpress | |
| 1 | Main board cable | 20cm | 50P 2x25P | Flat cable | AliExpress |
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Original thread (in Spanish) with details about the project uMSX: Clon MSX2+ FPGA
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Article (in English) with details on how to build, BoM, tips and tricks Yet another FPGA based MSX (The uMSX)
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Youtube video (in Portuguese) with additional details YouTube Video
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ATTENTION
This project was made for the retro community and not for commercial purposes. So only retro hardware forums and individual people can build this project.
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