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Hi Skip, Thank you for giving your blessing to those of us who are brave/crazy in this way. I’ve wanted to do this for some time but didn’t want to step on your (or Lee’s) toes. Would you

The current design using a RS485 transceiver won't allow collisions to be detected ...? I'm not sure that it's important enough to worry about.? The lure of a single chip solution to interface to

I know it's covered in the Microcomputer section of the service manual. Wouldn't surprise me if each peripheral device manual covered it too. There's a busy line used for claiming the bus, and then

According to documentation I read somewhere at one time, SB9600 is essentially half-duplex, so while the bus driver and bus reciever are "full duplex", it is for jabber and collision detection. I

Yes, I'm convinced. I think we so we can get the radio re-read the mode data when it's changed if nothing else. It shouldn't be difficult to deal with the timing on the Pico directly. Handing it off

Currently the write line isn't connected and the level converters aren't bidirectional so the X9kcat can't be written to by RSS in the usual manner. Additionally there's the open question of if the

Oh, right, you said that before, sorry. That's an excellent plan. De

Hi Group, Just a quick note, more later... I would really like to keep the differential driver so we can **ALSO** use the same board with different firmware as an external protocol converter. CV-I

Specifically, having now looked, single-ended versions of the /TX DATA and RX DATA are available on the accessory connector next to the CPU. Otherwise, based on the observed implementation in the

It does seem like it might reduce parts count if we tapped the SB9600 bus at a point where it's single ended. I haven't studied the schematic yet to see where / if that's possible. "Much slower" in

@ Skip, Regarding the usefulness of the onboard USB, I wasnt sure what you had in mind for connectivity devices and if any of them other than a PC could natively connect to the USB. I was thinking

Thanks Casey! 73's Skip WB6YMH

I can do that later this coming weekend. I did it earlier but didn't save the file and I'm out of town.

I've written a couple of python script to help me understand the SB9600 protocol better.? So far I've only used a Spectra. Unfortunately one thing that I've determined is that RSS almost always uses

Thank you Skip, this is awesome.

Skip, Thanks for sharing! De

I've put the source for the firmware for the original Xcat on github for anyone that is interested ( https://github.com/skiphansen/xcat_fw ). Memories, memories ... 73's Skip WB6YMH

It has to be balanced, of course, with limited EPROM space. If you _really_ wanted to minimize bit fiddling time, you'd put each four-bit unit in its own byte. Clearly they didn't want to double the

I'm thinking of an external box with an ESP32 with an SB9600 bus interface. This could give us Bluetooth connectivity to a phone app, or Android head unit in a car as well as Doug Hall and CI-V. If

@ Dennis, I was just making an insincere wise crack. I truely never looked into the why, but what you said makes perfect sense. From a uCs perspective that needs to output 4-bit data, it comes