strange chars are sent in serial port

Hello, I'm using a function to send char through the serial port. Sometimes, strange words (i.e ascii code 0x8 <VT>) are sent. I would like to know if some registers could be altered while an interrupt...
strange chars are sent in serial port

Hello, I'm using a function to send char through the serial port. Sometimes, strange words (i.e ascii code 0x8 <VT>) are sent. I would like to know if some registers could be altered while an interrupt...
How to implement " char * strcopy(char * DestStr, char * SourceStr, uchar StartPos, uchar Count

"Keil C51 is very good." ===> "C51 is v" strcopy(DestStr, SourceStr, 6, 8) ? How to implement it ?
How to implement " char * strcopy(char * DestStr, char * SourceStr, uchar StartPos, uchar Count

"Keil C51 is very good." ===> "C51 is v" strcopy(DestStr, SourceStr, 6, 8) ? How to implement it ?
STR9 + Visual Basic + USB

Hello I develop an application with the STR9-Comstick. The idea is to control the I/O ports with a program in Visual Basic through the USB-B connector near the pins of I/O ports. Which dll use for...