Search found 19 matches

by DrMario
Thu Jul 21, 2016 11:13 am
Forum: Projects
Topic: Oscilloscope add-on for STM32F7 Discovery - questions
Replies: 4
Views: 7020

Re: Oscilloscope add-on for STM32F7 Discovery - questions

VLIW architecture itself is actually a special purpose superscalar architecture because VLIW processors themselves issue and execute more than one instruction at a time, although that's a discussion for other time. (I view VLIW architecture more of a software-defined superscalar architecture, meanin...
by DrMario
Wed Jul 20, 2016 4:05 pm
Forum: Projects
Topic: Oscilloscope add-on for STM32F7 Discovery - questions
Replies: 4
Views: 7020

Re: Oscilloscope add-on for STM32F7 Discovery - questions

Sounds like a pair of compressed 16-bit operands (instructions). It's now clear to me (superscalar architecture in xCore-200 is rather weird, different from what I am used to, at least I will find a way to exploit it). As for assembly, I'd have to figure out the hazards carefully, as some low-level ...
by DrMario
Wed Jul 20, 2016 9:32 am
Forum: Projects
Topic: Oscilloscope add-on for STM32F7 Discovery - questions
Replies: 4
Views: 7020

Oscilloscope add-on for STM32F7 Discovery - questions

As I am designing my own decent oscilloscope add-on for the STMicroelectronics STM32F7 Discovery as I got a bit frustrated by excessive markups even on the used oscilloscopes, as well as lack of details in open source oscilloscopes (which usually turns out to be closed-source - the schematic diagram...
by DrMario
Thu Jul 14, 2011 2:48 pm
Forum: XMOS Devices
Topic: Suggested DRAM type usage...
Replies: 38
Views: 23069

Re: Suggested DRAM type usage...

You guys can still post here, I won't interrupt anymore. Just thanking you guys for some info, that's all.
by DrMario
Wed Jul 13, 2011 10:42 am
Forum: XMOS Devices
Topic: Suggested DRAM type usage...
Replies: 38
Views: 23069

Re: Suggested DRAM type usage...

I am surprised... I started this thread just to have the opinions from you experts, and I have seen so much demands... And some answers. Thanks for the answers, and I think I will stick with SDRAM for simplicity - DDR is just too complex and they like clock in check - but yep, there are such thing a...
by DrMario
Fri Jul 08, 2011 12:19 am
Forum: Projects
Topic: XS1-G4 supercomputing array (with memory)
Replies: 13
Views: 7953

Re: XS1-G4 supercomputing array (with memory)

<t>I have been considering a few power supply setup / topologies as they may need to be permanet, soldered on the individual XS1 boards, due to strict limitations on lower Vdd core voltage (1.0 Volts DC), while IO DC rail gets it easier. I may have to get both Vcore and Vio down to 1.0V, so IO cross...
by DrMario
Wed Jun 22, 2011 8:55 pm
Forum: Projects
Topic: XS1-G4 supercomputing array (with memory)
Replies: 13
Views: 7953

Re: XS1-G4 supercomputing array (with memory)

<t>Thanks for the response. I am going to start on the board for BGA-512 version of XS1-G4 chip (with 16 or 32-bit SDRAM for each cores) - and the Cyclone III FPGA for IO switching and context bridging to the main board.<br/> <br/> And, with 8 - 12 layers PCB containing four to eight XS1 chips, it m...
by DrMario
Thu Jun 16, 2011 10:40 pm
Forum: Projects
Topic: XS1-G4 supercomputing array (with memory)
Replies: 13
Views: 7953

Re: XS1-G4 supercomputing array (with memory)

<t>Alright, I want you XS1 experts, your opinions. You think I should assign each x8 / x16 SDRAM chips to each of the XS1 CPU cores, totaling up to 4 SDRAM chips for a XS1-G4 chip? You think it's good idea? Or should I be fine with just a SDRAM chip? I have been wondering about assigning each RAM sp...
by DrMario
Tue Jun 14, 2011 5:14 am
Forum: Projects
Topic: XS1-G4 supercomputing array (with memory)
Replies: 13
Views: 7953

Re: XS1-G4 supercomputing array (with memory)

<t>I may start doing the PCB design soon enough - just need to pick the package (preferably the BGA package)<br/> so I can fit on the board nicely, to afford the best IO datapath. Yup, it's kinda based off XMP-64 - only they will have their own RAMs as even the transputers Txxx series are still affe...
by DrMario
Tue May 10, 2011 12:49 pm
Forum: Projects
Topic: XS1-G4 supercomputing array (with memory)
Replies: 13
Views: 7953

Re: XS1-G4 supercomputing array (with memory)

<t>I guess I may have to suspend this project... Money's an issue right now. T____T<br/> And, I also doubt anyone appreciate this one as well (maybe there's no point as everyone do have<br/> AMD Radeon HD and NVIDIA GTX video cards by now).<br/> <br/> I get discouraged too easily, so maybe I did hit...