beame@maccs.dcss.mcmaster.ca (Carl Beame) (01/16/91)
I'm just finishing up some testing of a new VT220 emulator and I have run into a small problem. The VT220 can do both 7-bit and 8-bit emulation and therefore must be able to have an 8-bit data path at times. Currently, I send a WILL BINARY/DO BINARY Telnet sequence when 8-bit mode is entered and a WONT BINARY/DONT BINARY sequence when 7-bit mode is entered. This seems correct, but I am getting different behaviour againts several systems. And against many systems, 8-bit mode is unworkable. Here is a small table of results when switching to 8-bit mode, the column <CR> working indicates whether a carriage return properly terminates an input line. System O/S Responds DO/WILL <CR> working ================================================================ Multinet VMS Yes Yes Sun OS 4.1 Yes No Solbourne 4.0C Yes Yes SCO V3.2 Yes No CS/100 (milking mach.) Yes Yes IBM FAL/VM (line mode) No Yes Do I just give up the idea of using VT220 8-bit mode against Unix hosts ? Do I ignore Binary mode, since many hosts transmit in Binary even if the option is not set ? Comments welcome. - Carl Beame Beame & Whiteside Software Ltd. Beame@McMaster.CA