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Re: Multicomp 6809 and the Serial Ports [message #6026 is a reply to message #6024]

Thu, 28 February 2019 12:40

coolbear
Messages: 15
Registered: February 2019

Junior Member

Thanks Neal,

No joy.

Here's what the setup looks like.

I have the Serial (3v) to USB converter attached to MC board on SER B. I have CTS grounded just to eliminate that as a potential problem. RTS is already at 0V. I read the state of the status port on the 6850s and all three report a 0x02, so I should be able to transmit and receive. I'm assuming that the port runs at 115k just like SER A but I have tried a few other speeds. I use one instance of Teraterm to connect to the console and a second to connect to the Windows virtual com port, which in turn connects to SER B. When I type on the second instance of teraterm, I see the RD light on the converter blinking so teraterm is sending out bits.

The following works as expected:
{Term|02}/DD:echo hello >/term
hello

I would expect the following to print to the second instance of Teraterm:
{Term|02}/DD:echo hello >/t1

...but I get nothing. Same for /t0

I also tried:

tsmon /t1&

...and then I tried running the shell as you suggested. None of that worked.

I was thinking about firing up the oscope and verifying that the received bits are getting to the MC board and hence to the Cyclone II pin - but I haven't gotten around to that yet.

Trying to fall back to Level 1 is an interesting idea though. I don't remember where I downloaded the image for Level 2 but I'm sure I have notes on that somewhere. That might be easier than digging out the scope.

Something else that I'm looking at a bit is enlarging /dd. It feels pretty small - maybe something more like 5M-10M would be better.

Did I mention just how amazingly cool this thing is? I mean I now have a 6809 running at 25MHz (at least I think it is. Hmm, I'll have to check on that). Pretty neat stuff!

- David

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[Message index]

		Multicomp 6809 and the Serial Ports By: coolbear on Wed, 27 February 2019 11:58
		Re: Multicomp 6809 and the Serial Ports By: nealcrook on Wed, 27 February 2019 16:05
		Re: Multicomp 6809 and the Serial Ports By: nealcrook on Thu, 28 February 2019 11:42
		Re: Multicomp 6809 and the Serial Ports By: coolbear on Thu, 28 February 2019 12:40
		Re: Multicomp 6809 and the Serial Ports By: nealcrook on Fri, 01 March 2019 12:45
		Re: Multicomp 6809 and the Serial Ports By: coolbear on Fri, 01 March 2019 23:09
		Re: Multicomp 6809 and the Serial Ports By: nealcrook on Sat, 02 March 2019 01:29
		Re: Multicomp 6809 and the Serial Ports By: just4fun on Sat, 13 April 2019 03:25
		Re: Multicomp 6809 and the Serial Ports By: computerdoc on Sat, 09 May 2020 22:32
		Re: Multicomp 6809 and the Serial Ports By: nealcrook on Sun, 10 May 2020 08:47
		Re: Multicomp 6809 and the Serial Ports By: coolbear on Sun, 10 May 2020 11:28
		Re: Multicomp 6809 and the Serial Ports By: computerdoc on Sun, 10 May 2020 17:41

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