Registered: Oct 2000
Location: Arlington, TX
Posts: 334

How much would it be worth to you to be able to use 2 modules at the same time? I will be experimenting tonight to see if it's possible and worth the effort. I know that I would like to be able to use my wireless modem along with my 16M memory card. Let me know who is interested and how much you would be willing to pay for such a device.

Thanks,
Rick

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Rick

www.visorsolutions.com

Registered: Oct 2000
Location:
Posts: 380

Good luck. If your Visor survives and it works I will be thrilled (surprised, but thrilled).

Registered: Oct 2000
Location: Arlington, TX
Posts: 334

Why do you say that?

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Rick

www.visorsolutions.com

Registered: Oct 2000
Location:
Posts: 380

From everything that I have read, the SpringBoard slot is just an extension of the CPU bus with some extra lines like power, ground, microphone, etc. I don't believe that there is any buffering or bus contention logic. Multiple cartridges might draw too much power and drain you battery in minutes. Or they might send to much back into the VISOR at once. Even if they didn't cause any problems such as these, all of the data lines have the potential to have multiple simultaneous signals. Maybe the Visor ignores them and works fine. Maybe it locks up solid.

I just don't see how it could work without a whole lot of custom hardware to arbitrate the bus and at the same time make the modules think that they had direct access. I believe that it would also take some very complex software to drive the hardware.

Please tell me if I'm wrong. Just this once, I would like to be.

Registered: Mar 2001
Location:
Posts: 15

Im willing to shell out some good money to do two at once. I currently have a omnisky modem and would LOVE to be able to use an extra memory card or even a gps. But only if its safe