[RussellSt]

I am trying to upload a program to a 1992 citizen L20.
I made a cable as per instructions found on cnczone. 25 pin to 9 pin
It works fine for downloading to the computer. But it doesn't seem to want to take in data. I am using Hyperterminal.
Is there anyone who can tell me what things to check?
I have removed .txt from the file name
what protocol should I be sending? xmodem.....or should I choose send text file?
How do you get the machine ready to receive...what port? what device?

[James3]

Hi Russell,
Dont know if you still require the info but this is from our L20 roughly the era. EDIT / I/O / SCROLL DOWN (COMMUNICATIONS PARAMETER)
Attachment 204192
I also use a USB dongle from Startech.com and this works perfectly both ways
1 ft USB to Serial DB9 Adapter Cable | USB Serial Adapters | StarTech.com United Kingdom

[BobHamilton]

Did you ever get an answer to this question? I have the same issue.