Making a serial board for Briel Altair Micro

dwight dkelvey at
Tue Dec 15 11:51:06 CST 2015

Needs some more for the read and write controls.
Is the address latched from the altairmicro? if not you'll need a latch using the ALE.
You need to add a read port for the various status bits.

From: cctalk <cctalk-bounces at> on behalf of dave at <dave at>
Sent: Sunday, December 13, 2015 12:02 AM
To: cctalk
Subject: Making a serial board for Briel Altair Micro

After fiddling around with my Briel Altair Micro, I've come to desire more
than just the console serial port.  To that end, I read up on the 16550A
UART, line drivers, line receivers, and schematics for other
implementations of serial ports.  I came up with this:

How close am I to this design making sense and working?

David Griffith
dave at

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