[sdiy] Ursa major UART: WD2123

[Gordonjcp]

On Wed, Oct 26, 2016 at 06:05:55PM +0200, Rutger Vlek wrote:
> Thanks for all the replies! 
> 
> The use of the WD2123 in the Ursa Major is fairly strange, as it is intended for connection of an (optional) external remote through an RS232 driver and connector. However, the Ursa Major won't start it's CPU properly if the communication with the UART can't be established. Kind of strange to be so dependent on something that's largely intended for "an option". I followed all suggestions in the service manual for debugging the CPU step by step and I have reached the step that says: "swap the WD2123 out for a known working one". Also, from common sense I don't see how CPU startup could otherwise be halted. Even a faulty RS232 driver should not break communication between the CPU and the UART, but merely lead to bogus input data from a non-existant remote controller.
> 
> So my hopes are that a new WD2123 will get the CPU fully started again, as I'm out of alternatives.

Why not patch out the check for the WD2123?

-- 
Gordonjcp MM0YEQ