Search found 12 matches

by Frederir
Mon Sep 17, 2018 1:34 pm
Forum: FPGA Chat
Topic: 1942 Arcade
Replies: 0
Views: 732

1942 Arcade

Did anybody had a look into : https://github.com/d18c7db/FPGA_1942 ?
by Frederir
Thu May 24, 2018 7:16 pm
Forum: FPGA Chat
Topic: SGI on FPGA
Replies: 1
Views: 1623

SGI on FPGA

Hi all, From hackaday article : https://hackaday.com/2018/05/23/retro-rebuild-recreates-sgi-workstation-demos-on-the-go/ Alice4 a FPGA for emulating SGI Workstation with graphic demo from the time: https://github.com/lkesteloot/alice/tree/master/alice4/fpga It seems a version for DE-0 exists :-) F.
by Frederir
Fri May 18, 2018 6:57 am
Forum: MiSTer
Topic: RTC board
Replies: 86
Views: 19467

Re: RTC board

https://en.wikipedia.org/wiki/Thermistor
NTC for 3D printer extruder can be get for really cheap :
https://www.gearbest.com/3d-printer-par ... id=1433363

Of course it must be fixed to the FPGA heatsink one way or another. Epoxy glue is easy.

F.
by Frederir
Thu May 17, 2018 9:51 pm
Forum: MiSTer
Topic: RTC board
Replies: 86
Views: 19467

Re: RTC board

What about using a NTC and an I2C ADC ? The NTC could be put on the FPGA's heatsink and connected to the board with wire ? MCP3021A0T is cheap and 10 bits should give an adequate resolution for the temperature.
by Frederir
Sun Apr 29, 2018 9:46 am
Forum: MiSTer
Topic: Jaguar
Replies: 6
Views: 2200

Jaguar

Would mister be big enough to fit the jaguar design : https://github.com/Torlus/JagNetlists Which is interesting because it is translated from the original netlist : https://github.com/Torlus/JagNetlists/tree/master/netlists_org With both Tom and Jerry chip. The design fit in a Stratix II : EP2S60F6...
by Frederir
Fri Feb 23, 2018 10:11 pm
Forum: MiSTer
Topic: I/O Board
Replies: 199
Views: 39171

Re: I/O Board

While adopting MiSTer to Pi-Top case i also implement HUB, but using FE1.1S. It almost doesn't require external components and very cheap. The GL850G is in the same league as the FE1.1. Only external crystal needed and two resistors + decoupling. I did not check the power consumption to see which o...
by Frederir
Fri Feb 23, 2018 12:29 pm
Forum: MiSTer
Topic: I/O Board
Replies: 199
Views: 39171

Re: I/O Board

Full_MISTER_USB.jpg While waiting for my SDRAM PCB. I quickly modified the IO/Board to add a USB hub (based on GL850G). I had to get rid of button and led connectors and to modify the button to place them in front. A micro usb jumper PCB link the USB from the DE10 to the IOBoard USB. What do you th...
by Frederir
Fri Feb 16, 2018 4:59 am
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 11424

Re: Analogue Super NT

Many retro systems didn't follow official standards and had slightly out of standard deviations, but many modern HDMI TVs don't tolerate these deviations. Ok I see the need of a buffer to have a constant 60/50Hz framerate whatever is the input frame rate. But it means there is a lag of at least 1 f...
by Frederir
Fri Feb 16, 2018 12:34 am
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 11424

Re: Analogue Super NT

Sorgelig wrote:
Frederir wrote:So we have two differents memory bus ... ?

Obviously one is for HDMI scaler.

Well, once said it is obvious :-)

What about https://github.com/marqs85/ossc ? Would it be possible to use it to replace VIP IP from Altera ?

F.
by Frederir
Thu Feb 15, 2018 7:05 am
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 11424

Analogue Super NT

Curious about the hardware architecture of the Analogue Super NT FPGA device, I looked around to find picture of the PCB and I found : https://cdn.vox-cdn.com/uploads/chorus_asset/file/10174149/super_nt_guts.jpg Cyclone 5 FPGA as known, a PIC32MX for SDCARD and random boiler plate functions. The mai...
by Frederir
Tue Feb 13, 2018 7:35 pm
Forum: FPGA Chat
Topic: Lattice FPGA
Replies: 2
Views: 1570

Re: Lattice FPGA

Also, making a product based on FPGA company which has only fractional of the market is risky. Well with Intel in charge of Altera, I'm not sure their priorities are toward small affordable FPGA for industry. But I understand the point, Micro semi/Actel also have some interesting parts. From a stri...
by Frederir
Tue Feb 13, 2018 1:29 pm
Forum: FPGA Chat
Topic: Lattice FPGA
Replies: 2
Views: 1570

Lattice FPGA

Hi, I'm new to FPGA emulation and looking around I saw a lot of solutions based on Altera, I wondered why Lattice ECP5 were not more popular ? They have a great memory to logic ratio and a lower price in small quantities than comparable Xilinx/Altera parts. I only found this board : https://www.flea...

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