Folks,
I noticed a few posts about the limitation to port 1-16 of MSComm. As
I completed my generic ASCOM DSLR driver, I wanted to fix this
limitation.
There is a hack that can be done to the mscomm file to increase the
port number to 1-256:
Get an HEX editor
open C:\windows\system32\mscomm32.ocx (make a backup copy too)
Find the string "66 3D 10 00" (there is only one)
Change the string to "66 3D FF 00"
Save the file.
I just tested it with my driver and my $3 USB to rs232. It would
normally go on port 14 but I changed to port 255 and it works great.
Maybe this is old news, but just in case you need it...
Cheers,
I noticed a few posts about the limitation to port 1-16 of MSComm. As
I completed my generic ASCOM DSLR driver, I wanted to fix this
limitation.
There is a hack that can be done to the mscomm file to increase the
port number to 1-256:
Get an HEX editor
open C:\windows\system32\mscomm32.ocx (make a backup copy too)
Find the string "66 3D 10 00" (there is only one)
Change the string to "66 3D FF 00"
Save the file.
I just tested it with my driver and my $3 USB to rs232. It would
normally go on port 14 but I changed to port 255 and it works great.
Maybe this is old news, but just in case you need it...
Cheers,
Vincenzo
Another Link:
http://www.foxite.com/archives/mscomm32ocx-hack-0000081167.htm
