The Sinclair QL Forum

I'm trying to connect my QL to a serial printer. The printer is an Apple ImageWriter. It is the only serial printer I have and interfacing it with a Macintosh Classic works correctly. I built a serial cable (see photo and pinout), but when I try to print (see program), the printed characters are indecipherable (see photo). Unfortunately I don't know if the speed set by the baud command is correct (I've done several tests but 600 is what makes me print something), and I haven't found anything documented regarding the parameters that must be put after ser2 (ic I found them on a YouTube video about a brother printer).
When creating the serial cable I used a Topic here on this same forum. If anyone can verify the correct connection of the cable pinout (designed to work on ser2) and maybe some suggestions for having a correct print I would be grateful! Thank you

PS: The connections are seen from the front side of the cable connectors.

600 Baud is very unlikely.

Apple. ImageWriters default to 9600 Baud if I remember that correctly. So, you should probably try this.

tofro wrote: Tue May 21, 2024 1:50 pm 600 Baud is very unlikely.

Apple. ImageWriters default to 9600 Baud if I remember that correctly. So, you should probably try this.

Fantastic! I thought serial printers didn't reach these speeds. Tonight when I'm in front of my equipment I'll try with that Value.

And as you apparently have the handshake lines connected, you should probably also use them (i.e. leave out the "i" from the device name).

I'd try

With 9600 baud it works!
I tried with this code you wrote me, but I get long waits between one printed line and another.
Rather something like this works:

OPEN #3, ser2i

In this case I immediately obtain the printing and the correct wrapping of the printed strings.

Maybe I made a mistake with the Handshake cables?