RS232

here i will track some things regarding rs232 emulation, and perhaps fix things while at it Gpz (talk) 19:29, 25 July 2019 (CEST)

for all first tests i will use some version of CCGMS, and regular user-port rs232 emulation at 2400 baud.

using a real RS232 port

This works by using the device name of your OS, VICE uses physical RS232 ports.

linux

RsUserEnable = 1
RsUserBaud = 2400
RsUserDev = 1

RsDevice1 = /dev/ttyUSB0
RsDevice1Baud = 2400

status: working out of the box

windows

RsUserEnable = 1
RsUserBaud = 2400
RsUserDev = 1

RsDevice1 = com6
RsDevice1Baud = 2400

• the windows driver understands various options passed in the so called "mode string" after a colon after the ports name

COMx[:][baud=b][parity=p][data=d][stop=s][to={on|off}][xon={on|off}][odsr={on|off}][octs={on|off}][dtr={on|off|hs}][rts={on|off|hs|tg}][idsr={on|off}]

• finding out what COM port the usb adapter ended up might be tricky, you can use a tool like "Keyspan Serial Assistant"

status: working after some massaging of the code

rs232 over ip

This works by using the IP and port you are connecting to, VICE will use a TCP socket.

connect two VICE instances on the same host

$ socat tcp-listen:25232 tcp-listen:25231

config instance #1

RsUserEnable = 1
RsUserBaud = 2400
RsUserDev = 2

RsDevice2 = 127.0.0.1:25232
RsDevice2Baud = 2400

config instance #2

RsUserEnable = 1
RsUserBaud = 2400
RsUserDev = 2

RsDevice2 = 127.0.0.1:25231
RsDevice2Baud = 2400

linux

status: works

windows

status: works

connect two VICE instances on different hosts

status: untested

piping to an external program

linux

status: untested

windows

status: untested

TODO

• whether the "UP9600" (daniel dallmann) hack is being used seems to depend on the baudrate(?). this should be a seperate option

driver issues

• handling of DTR and RTS seems to be completely missing. rs232dev_set_status, rs232dev_get_status, rs232dev_set_bps apparently are not called by the layer above

user interface

• a couple of typical rs232 settings should probably be configurable for at least "real rs232 port at host". (behavior of DTR, RTS...)

links

• https://vic20reloaded.com/vic20-c64-network-gaming-winvice/ - Connecting two emulators on the same machine
• http://www.jbrain.com/pub/linux/serial/ - original tcpser source
• https://github.com/geneb/tcpser - genebs fork of Jim Brain's tcpser serial port to TCP/IP bridge.
• https://github.com/FozzTexx/tcpser - FozzTexx fork of Jim Brain's tcpser serial port to TCP/IP bridge (including genebs changes)