christo930 said:
EVERY gp2x can run at 200mhz which is the advertised speed. Almost all can reach 240 which is the rated speed of the chips. What most likely happened is that they were going to do was market it as a dual 240mhz machine and some of their chipsets didn't make the full 240, so they cut it to 200 which would extend the battery life anyway. Complaining that your machine doesn't "overclock" isn't fair to Game Park.
Mine was advertised as 240Mhz on GP2x.co.uk but could never clock above 210. That wasn't GPHs fault, as it wasn't them who advertised it as 240. It was gp2x.co.uk. To be fair, Craig did say that I could return it for replacement but at the time I didn't want to be without it and couldn't be bothered with all the hassle of sending it back as I didn't really use anything that really needed a higher clock speed (although that was before Picodrive supported Virtua Racing!)
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I don't know if you're getting technical because the 2 cores aren't exactly the same (940 and 940T?), but it is largely considered a dual core chip. There is even some software, like pico-drive that can use both cores.
Chris
Using two CPUs is not the same as having 2 cores. Two cores mean two IDENTICAL cores that run in parallel, generally with threads being scheduled accross the cores by the OS. The second CPU in the GP2X has a different instruction set, is poorly documented (I believe) and does not have instructions scheduled to it by the host OS. As you said, picodrive can use both processors but the program has been specifically coded to make use of that processor, whereas a dual-core system would benefit ANY application that was programmed in a multi-threaded manner.
I didn't know they were that different. I thought the biggest problem was the way the cache is setup, that the second processor doesn't have a cache and that it lacked an mmu (or something like that). I didn't realize they had totally different instruction sets and registers and what not. I guess they never really expected it to be used by anything but their media player. Kind of dumb to do it that way.
Chris