Procyon 2.0 Assembled
Procyon 2.0 has the same form factor comparing to Procyon 1.1
However, now the architecture has the ARM Cortex M3 system controller handling 2 USB ports, SDHC card interface, MIDI and service OLED LCD display.
FPGA and ARM FW images can be uploaded via USB interface or auto-programmed via SDHC. One USB port is TYPE A (HOST) and the other is USB OTG (TYPE A/B). Both ports can have USB HID devices (Keyboard/mice/gamepad), mass storage and/or wireless. USB HUBs are not supported by the current ARM FW.
Also the HDMI genlock now is on the board together with the composite video/CSYNC socket.
The card will undergo the trial runs
Procyon 2.0 Boards Arrived
New Procyon rev 2.0 were manufactured.
Back to classics. Final VCO is discrete design, but great performance!
The final VCO architecture was selected, designed and tested. It is not an all solid state VCO though. But despite multitude of components, it offers an excellent low noise performance, temperature stability. The tuning range is superior to the original discrete design. Increasing the tuning range reduced drastically the PLL lock time. Now it takes 2 seconds to achieve a full lock on the VDP scan mode change.
No spurs, ultra clean!
And a very important property of this design – it all works without a shield!
New solid state VCO. Success
The new all solid state VCO was tested. It is little bit noisy, but it has no external inductors to be shielded.
Despite elevated phase noise the HDMI image is very stable.
On the spectrum there are very distinctive spures.
The loop filter to be re-designed.
Final decision will be taken whether to use the discrete VCO or solid state VCO.
Preparing Next Generation Procyon
New solid state VCO (Voltage Controlled Oscillator) design will replace a fully discrete VCO (on the left card) in order to improve the DFM (design for manufacturability). VCO is a heart of the HDMI genlocked PLL module, which performance is essential to the stability and quality of digital image.
However, still quite a low of work is required on the VCO itself, due to the very high level of phase noise.
This is how it supposes to be:
Here is a very high solid state VCO noise:
So more work to be done on the new solid state VCO soon…
Procyon @Nijmegen Fair 2016
Procyon was successfully demonstrated at Nijmegen MSX Fair 2016.
HDMI/DVI-D link works flawlessly even with a wide screen projector:
Procyon now runs MSX2 titles
Procyon now runs MSX2 titles. MSX2 VDP V9938 chip is implemented including the industry first “HDMI zero delay multi mode Genlock”! The full on the fly support of 50/60 Hz progressive and interlaced video modes was added.
MSX2 slash screen running on Toshiba-FS-TM1. 50Hz
Space Manbow. 60 Hz.
Procyon Audio is Debugged
SCC bug is now fixed and the antialiasing filter was redesigned also. The output volume levels for SSG and SSC were readjusted.
TOSLINK/SPDIF output is now fully operational.
New DEMO was recorded to provide an early experience.
Full SCC+SSG+PPI Audio Support is Implemented
Procyon now emulates SCC, SSG, PPI MSX audio hardware. Also it includes the 16 bit audio DMA, which is used at the start-up for the SDRAM and AC97 CODEC test purposes.
And here is the VIDEO of the audio demo.
Using memory
Procyon expands MSX memory to 4096K. The 64 Mbytes of onboard memory are shared between the emulated main RAM, VDP video RAM, frame buffer RAM, SCC (ESE) RAM, cartridge ROM emulation (DOS/DOS2), etc.
Procyon Arcade Boards Received
Boards and components were received. Procyon enters the MSX slot without a problem!
Procyon boards manufactured
Procyon Arcade MSX compatible FPGA platform PCBs were manufactured in Sunnyvale and currently transported by FEDEX.
Hello world!
January 9, 2014 Leave a comment
WELCOME!
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