On 07/08/2020 03:02 PM, Fred Smith wrote:
On Wed, Jul 08, 2020 at 01:40:27PM -0500, Chris Adams wrote:
Once upon a time, John Pierce jhn.pierce@gmail.com said:
yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ? the former do NOT use the rx/tx data of the serial port at all, they ONLY use the serial port control signals, and they probably will NOT work with a USB port because they require very specific behavior from those signals at power up and reboot times.
I've used various serial devices, including UPSes, via various USB-to-serial adapters (Prolific PL2303 and FTDI FT2232C), and all the signaling works fine. Only issue you sometimes have is that there are many cheap adapters on Amazon that claim to be Prolific or FTDI but are in fact counterfeit clones - those may or may not work reliably for ANY purpose.
Another possibility for the Original Poster: Purchase a serial add-in card from Amazon or Newegg. last I noticed they weren't expensive. This avoids the compatibility-hell you may (or may not) encounter with a USB-to-serial converter.
Fred
OK, I'll see what fits the machine best.