Leonard Erickson wrote in a message to Jasen Betts:

 JB> are there max232 chips driving the serial end or is it 1488/1489 chips
 JB> the max will work from +5v but the 1488s want about +/- 12v

 LE> It does have the 1488/1489 chiups. I remember those from when I had
 LE> it open, because I recognized them.

I wonder how they derive the power for those?  The one that needs the 12
volts,  anyhow...?

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