30864re: [midatlanticretro] Retro WiFi
- May 20, 2013On Mon, 20 May 2013, B. Degnan wrote:
> -------- Original Message --------I opted for a 6-wire level shifter, in order to play with RTS/CTS flow
>> From: "Mike Loewen" <mloewen@...>
>> Sent: Sunday, May 19, 2013 10:01 PM
>> To: email@example.com
>> Subject: [midatlanticretro] Retro WiFi
>> A few weeks ago, we were speculating on the possibility of using a
>> Raspberry Pi, a serial level shifter and a USB wireless dongle to get
>> vintage systems online. I'm happy to report that the proof of concept is
>> successful. I'm typing this on a stock TRS-80 Model 4P, running IMP 2.45
>> under Montezuma Micro CP/M. There are some problems to be worked out, as
>> I'm seeing some weird echo effects, despite the serial setting being
>> correct. I'll update the group as I continue testing. With this
>> configuration, it's also possible to connect via 100BaseT.
> Wow sounds like fun. I don't have a serial level shifter. What is that?
> I have the Pi and TRS 80 Model 4P with Mont CP/M would love to try this. I
> think I am running a Debian on my RasPI, MAME stuff.
control. I used this one, based on a SP3232 chip:
Run it off the 3.3V supply pin. You can solder headers to the Raspi
2.0 board to get access to RTS and CTS.
The wireless adapter is an Edimax EW-7811un. Don't skimp on the power
supply for the Pi - get a 2A supply such as used for the Nexus 7 tablet.
Underpowered supplies will give you no end of grief.
Mike Loewen mloewen@...
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
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