loaded the file bootloader file , via programmer

but the com port does not detect the device
have no rts/dtr avaialble -
used com7(usb interface) - usart1 19200 ( rx1 - rc7 pin , tx1 - rc6 pin)
tried manual rest and remote signal - looking for 65,66,67 , which i am assuming the bootloader has setup somewhere , but i cant see it

usart1 is connected to a usb to serial ttl converter ch340 driver

removed all memory code protect in cchip config for bootloader , just as test

any sugestions