Recently I saw a tour around Wilk Elektronik fab (Polish company, they own GoodRAM brand). http://www.egielda.com.pl/?str=art&id=2902&action=all (its in Polish, sadly no interesting pictures )
There was one interesting thing - their testing lab. Currently they are using modded PC motherboards (Variable Voltage Regulator) to test modules (bad chip detection, performance). At the end of the tour Lab monkey showed of his latest monster, test setup for hot swap module testing, the key point and main feature of this beast was using PCIE Video card memory for the main program memory.
Currently LinuxBios is using CAR for ram. What about using Video card memory? is that feasible? Can you setup Video memory as stack?
On 5/30/07, RusH citizenr@gmail.com wrote:
Recently I saw a tour around Wilk Elektronik fab (Polish company, they own GoodRAM brand). http://www.egielda.com.pl/?str=art&id=2902&action=all (its in Polish, sadly no interesting pictures )
There was one interesting thing - their testing lab. Currently they are using modded PC motherboards (Variable Voltage Regulator) to test modules (bad chip detection, performance). At the end of the tour Lab monkey showed of his latest monster, test setup for hot swap module testing, the key point and main feature of this beast was using PCIE Video card memory for the main program memory.
Currently LinuxBios is using CAR for ram. What about using Video card memory? is that feasible? Can you setup Video memory as stack?
Do you need execute option rom in that card, to initialize the setup Video?
DDR2?
YH
Am Mittwoch 30 Mai 2007 schrieb RusH:
Recently I saw a tour around Wilk Elektronik fab (Polish company, they own GoodRAM brand). http://www.egielda.com.pl/?str=art&id=2902&action=all (its in Polish, sadly no interesting pictures )
There was one interesting thing - their testing lab. Currently they are using modded PC motherboards (Variable Voltage Regulator) to test modules (bad chip detection, performance). At the end of the tour Lab monkey showed of his latest monster, test setup for hot swap module testing, the key point and main feature of this beast was using PCIE Video card memory for the main program memory.
Currently LinuxBios is using CAR for ram. What about using Video card memory? is that feasible? Can you setup Video memory as stack?
The video ram is not so fast as the mainboard ram. What use a DDR3 ram when the pci-e 16x is the bottelneck. Also the mainboard ram has a much greater size. Markus
On Wednesday 30 May 2007 18:57, RusH wrote:
Currently LinuxBios is using CAR for ram. What about using Video card memory? is that feasible? Can you setup Video memory as stack?
It would be possible, but this memory also is disabled after reset. To use it as RAM you must enable graphic controller's SDRAM controller first. And to enable graphic controller's SDRAM controller, you must init its PCI configurations space first, otherwise you can't access its registers....
Using CAR is much easier, as it depends only on CPU features.
Juergen
On 5/31/07, Juergen Beisert juergen127@kreuzholzen.de wrote:
On Wednesday 30 May 2007 18:57, RusH wrote:
Currently LinuxBios is using CAR for ram. What about using Video card memory? is that feasible? Can you setup Video memory as stack?
It would be possible, but this memory also is disabled after reset. To use it as RAM you must enable graphic controller's SDRAM controller first. And to enable graphic controller's SDRAM controller, you must init its PCI configurations space first, otherwise you can't access its registers....
thanks, so it looks like that 'magic hot swap testing program' is not a bios replacement. Earlier I was under the impression they wrote the whole thing as close to the bare metal as possible.
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Juergen Beisert -
Markus Boas -
RusH -
yhlu