self signed certificate. A planing fixed it.

They look good - do you have links to buy them, or part numbers to search for?
Thanks
Ed

http://www.ebay.com/itm/Altera-Cyclone-IV-FPGA-Development-Board-EP4CE6E22C8N-20-days-promotion-/271434726780?pt=LH_DefaultDomain_0&hash=item3f32c53d7c

Price is ~50$

http://www.amazon.com/Altera-CycloneIV ...

For simple computers i use this EP4CE6 kit.
http://forum.6502.org/images/migrated/034572-000.jpg


- 16bit VGA (RGB 565)
- PS/2
- 4M x 16Bit x 4 Banks SDRAM
- 32M-bit Serial Flash
- 8bit A/D converter
- IR recivier
- 4 butons
- 4 LEDs
- 4 7-segment display (pins shared with LEDs_
- buzzer
- USB ...

..
Nothing else on there apart from regs, 50MHz oscillator and the configuration chip (underneath), which personally is how I prefer it so that there is no dedicated hardware already allocated to pins.

http://forum.6502.org/images/migrated/034571-000.jpg

Works really well for me, and enough on ...

Video of testing turbo feature.

Good work Grant!

Hi.
Not sure I understand, but the D key is supposed to crash the computer - it does on the real UK101 as well because there is no disk connected.

You say there is no problems with the other keys? If that is the case, then it is working exactly as the original UK101.

Grant

Yes as you write ...

So, when you press another key instead of C/W/M, what exactly happens? Locks up, screen corrupted? Anything then happen when you press C ?


Actualy i syntetize your latest code (with license header and change cpuclock count From 50 to 49) and testet it.

I test murtiple key combinations a ...

I use internal weak pul-up. I dont have ani problem with ZX80/ZX81/Jupiter ACE cores.And your core working OK. Problem is ony with cegmon in first selection.
Is there a speed difference? The internal weak pull-ups may be much too weak to charge up the capacitance on the line in time for a faster ...

Then, I took all your files from SVN and recompiled. Worked fine with MonUK02.
I changed the uk101.vhd to use CEGMON and recompiled. Again, it works perfectly.


I have problem only when i after reset pres other keys. If i pres C/W/M all is ok.


Are you using Quartus II 13.0 sp1 (latest that ...

Difficult to say - did you make any changes?
I know it definitely works because someone else has also got it working (including running space invaders on it) and I spent time yesterday evening re-testing everything (including all four modifications that will be published shortly) in readiness for ...

I tested your core but CegmonRom don't accept any key from keyboard. MonUK02Rom work OK.

What am I doing wrong?

For transmitting in high power is better low impedance (25,12.5 Ohm) lower supply voltage.
The impedances at the transistors were extremely low, and matching networks brought them up or down to 50 ohms. Often the impedance looking into the power transistors' input was a fraction of an ohm, plus a ...

Cool project. New core for mi FPGA PC. (http://zz-indigo.mavipet.sk/?page_id=79)

I can't find license of code. What is the license?

p.s. Excuse mi poor English.

The capital omega shows up for me properly now. The OP was almost three years ago.

I worked in VHF/UHF power-transistor applications engineering in the mid-1980's, mostly at 175MHz and transistors up to 150 watts output, with a little work also at 30MHz and 450MHz and even less at 1.2GHz. We didn ...