mirror of
https://github.com/UzixLS/mist1010-board.git
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74 lines
2.9 KiB
Markdown
74 lines
2.9 KiB
Markdown
## MIST.1010
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10x10cm PCB variant of [MIST FPGA](https://github.com/mist-devel/mist-board/wiki) project
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[](images/README.md)
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[](images/README.md)
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[[More photos]](images/README.md)
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Tech specs:
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- EP3C25E144 FPGA
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- 32/64Mb SDRAM
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- VGA/RGB video output
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- Composite video + audio output via 3.5 jack connector (raspberry-pi compatible pinout)
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- 4xUSB ports for keyboard, mouse and joysticks
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- 2xDB-9 ports for Amiga mouse and joysticks
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- SD/microSD card slot
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- RTC (clock) with battery
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- Tape input / output
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- ESP8266 WiFi module
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- MIDI input and output (starting from rev.C)
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- Type C (starting from rev.D) or MicroUSB power supply
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- Board optimized for G738 and G706 cases
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Some random photos: [link](https://cloud.err200.net/index.php/s/73TR85tYZkMm8Ax?path=%2Fmist1010)
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### Changelog
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* Rev.A - first revision. Please note the [errata](pcb/rev.A/ERRATA.txt).
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* Rev.A1:
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* fixed all rev.A issues
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* LM3940IS-3.3 replaced to NCP1117-3.3
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* sound output circuit has been replaced with the original one from the MIST 1.3 circuit
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* C39, C40, C80 tantalum capacitors has been replaced by aluminum electrolytic capacitors
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* added ARM's "erase" testpoint
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* removed useless internal speaker
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* Rev.A2:
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* C41, C68, C69 10uf ceramic capacitors has been replaced with 22uf tantalum
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* added C74 ceramic capacitor near ESP-01 module
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* Rev.B:
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* added ESP-12E/F footprint (ESP-01 is still an option)
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* added MIDI input and output
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* removed U11 - AD724 encoder
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* added resistors-based CVBS (Y+C) video circuit
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* added JP4 solder jumper to disconnect CVBS circuit from 3.5mm jack
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* added U16 buffer with dedicated power source U17 for audio 1-bit DAC
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* added USB 2.54mm header
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* tuned SDRAM traces length for better match with MIST v1.3 PCB
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* changed U6 (attiny) footprint from DIP to SOIC
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* changed Y1 and Y2 footprints from THT to SMD
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* changed 1117-3.3 footprint from TO-252-2 to SOT-223-3
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* added U12 dedicated +3.3V power source for SD card and WiFi
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* 3mm front leds replaced by 5mm
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* R38 (VGA's +5V 0Ω resistor) has been replaced by solder jumper
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* changed tape header pinout
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* pcb corners are rounded now
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* experimental reset circuit based on MAX809
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* various changes in board layout
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* Rev.C:
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* used USB Type C instead of Micro USB
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* PJ-320 3.5mm jack replaced by PJ-322
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* added solder jumper to select 3.5mm jack CVBS pinout
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* improved power distribution for FPGA chip
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* removed U16 buffer for DAC as it didn't bring any benefits
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* marked C27 and C28 as DNP
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* reverted to old reset circuit
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* various minor changes in board layout
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* Rev.C1:
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* changed R47 from 220Ω to 1kΩ to reduce power led brightness
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* slightly moved C87 and C89
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### Useful links
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* MIST wiki: [link](https://github.com/mist-devel/mist-board/wiki)
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* MIST cores and firmwares: [link](https://github.com/mist-devel/mist-binaries)
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