Some weeks ago there was a question about average Clock cycles Per Instruction (CPI) of JOP. As this number is application dependent we first have to define a...
What are the clock speeds you're seeing with the current versions of JOP running on Spartan 3 and Cyclone? Ed ________________________________ From: Martin...
Hey Martin, That's some great info! Not only does it allow us to plan an approximate execution time for a given program, but it also contains some good...
... I'm a bit curious, how do you get the 83 MHz for Spartan 3? WebPack reports a speed of 104.679MHz at speed grade -5, but then later states that the "timing...
... Don't use the timing estimate from the Synthesizer! This is a common mistake with the Xilinx tool. This is from the Synthesize report (jop.syr) - see the...
A new version of JOP is available: A variable block instruction cache (as descibed in [1]) is implemented. The logic for a four block version adds a few % to...
Cool! What does this translate into in terms of max clock rate? ... From: Martin Schoeberl [mailto:martin@...] Sent: Monday, January 17, 2005 2:45 PM...
The clock rate is the same - 100 MHz in the Cyclone. In a 'standard' cache the tag memory usually determines the maximum access time to the cache (tag RAM read...
Hello, I came across the JOP several months back, and filed it as an interesting idea to tinker with later. Well, the time has finally come for me to tinker...
Hi John, ... I've constraint the timing to 100MHz in the .ucf file to see how fast JOP could run in the Spartan-3. However, I'm not using any PLL in the design...
... You need 1,047,616 bits for configurations of the xc3s200. On the Board should be a xcf02 PROM (2 MBit), so you have around 800,000 bits free. If you...
emanuel stiebler
emu@...
Jan 23, 2005 5:52 pm
95
Just wondering if anyone hastried to get JOP running on a virtex II pro. If so what did it take them to do so. Or is this even really possible with out alot...
... That should be enough for many applications. At the moment I use JOP for a railway project in an embedded device with Internet connection over a mobile...
Hello, I've just read about new MIPS32 24Kc. They say it should be good for portable java based applications. I just wonder if there may be any hardware...
Hello Mike, ... As far as I can see they have no special support for Java - They're using it just as a buzzword. According to the press release Java is...
Brett, ... A quick check with the Xilinx WebPack showed no issues - that means the internal memories should be compatible with the one in the Spartan-3. The...
Ok so based on this if I am thinking correctly the only thing I need to do is convert the jop.ucf file to work with the pin locations on the viretx II pro...
... The .ncd and .pcf are Xilinx generated files. The project consist of only two files: jop.npl - project file (which VHDL files, device...) jop.ucf -...
curious if anyone has gotten sdram to work with JOP yet. I have been working on getting it to with a viretex II pro board but have had a couple problems arise...
Hi all, I'm thinking about a new board for JOP (or any other soft-core processor). The board should be small and cheap. It should only contain the absolute...
Hi Martin, I would LOVE to see a Spartan 3 board as you described, in a small form-factor board for < $100 USD. Break out a bunch of the i/o lines to 0.1"...
Hi John, ... I'm getting pulled towards a Cyclone board. It's easier as it has only two different voltages (compared to 3 for the Spartan). And JOP runns ...
guys... I'm ordering linux SBC. I hate C, and ASM even more... but for a product going to be sold, it must be low cost. Pity that I can only use the jstamps,...
Brad, ... As I will go with SimmStik it will be compatible with Systronix Jsimm bus specification. I'll hope JOP can be a replacement for JStik. It should be...
Another idea: What do you guys think about adding a slot for a SD Card [1]. They are cheap (about EUR 10,- for 128MB) and you get them up to 1GB! However, the...
Hi Martin, I've used an SD card with a Spartan 2e. One thing I did was to use a small microcontroller (an Atmel ATTiny12 which is a SO8-size part) to load the...
Hi Ed, ... Do you think it's a good idea to only have the SD for configuration (instead of a serial Flash)? I thought it as an optional storage and keep the...
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