Quote:
Originally Posted by Geoff Harrison
A11 tells the 2nd stage loader (what MITS calls the checksum loader) and Basic that the terminal is on a 2SIO, A10 tells them how many stop bits to use; up=1 stop bit, down=2 stop bits.
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And in the manual 1 and l are the same character. When I got my first Altair with disk drives the instructions were to raise switch "A11", which looked like All to me.
It took a while to figure that one out.
