I have not tried such fast BAUD rates, I use just 115200. That seems real fast, I learned about ASYNC with an ASR33.
Mechanical decoding at 110 BAUD! I fed miles of paper tape through those machines.
My USB to ASYNC converter board that uses a CH340 chip does not have the extra RS232 lines brought out so I don’t have
the ability to automatically handle reset. My converter board only has TxD, Rxd, and ground. I have better boards coming.
When I download the latest release, os_219_rev7.bin, I get these messages:
load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0
In the past with a working system the messages would continue and report
the IP address and the time and something about checking for the weather.
By the lack of these messages I assume that the OS firmware is not running.
The WiFi does not come up.
If I download to a base address of 0x0 I get these messages. If I download
to a base address of 0x1000 I get just garbage text. Do I need to position
the download image at some specific address?