41CL Self-Update

[Monte Dalrymple]

(11-19-2017 03:42 AM)Neve Wrote:  

(11-18-2017 10:10 PM)Monte Dalrymple Wrote:  It is possible to test the 41CL serial port. Basically plug in the serial cable and then
connect the TX and RX pins on the DB9 end. Turn on the serial port and send a
byte. Then check the receiver for a received byte. No need to take the machine
apart.

How do you turn on the serial port and send a byte??
I performed the procedure Sylvain suggested earlier. I believe that’s what it does.
I’m 100% certain that the inside connector is not reversed. It looks exactly as the pictures on the CL manual. Also, it won’t fit the other way around.
However, maybe one of the wire strands is cut or defective, or is too compressed between the two halves. I don’t know...
Maybe the connections at the back of the female jack are not the right ones. That’s all I can think of at the moment.

Needless to say this is very frustrating.

Insert the serial cable plug. On the other end, connect pins 2 and 3 of the DB9
together. This creates a loopback condition.

Using YFNX:

XEQ "SERINI"
XEQ "SERON"
"805000-0000"
XEQ "YMCLR"
"805000-AAAA"
XEQ "YPOKE"
"0000"
XEQ "YPPNT"
"0010"
XEQ "YGPNT"
XEQ "YPUTLB"
XEQ "YGETLB"
"805010-0000"
XEQ "YPEEK"

The display should show "805010-00AA" indicating that "AA" byte was sent and
received.

This test DOES NOT verify that the RX and TX signals are connected to the
correct pins on the DB9 connector, but it DOES verify that the byte sent
by the transmitter exits the 41CL transmitter, goes through the serial cable,
and returns back to the 41CL receiver.

Monte