The Sinclair QL Forum

Thanks all. Today (Friday 12th September) is our actual moving in say. It's also our going offline day.

Catch you all later.

Cheers,
Norm.

Today I received ... the keys to our new house in Dyke, a small village near Forres up here in NE Scotland. It's taken three years but we've finally found a house! The bad news is, the mobile phone reception there is worse than it is here, so our hope of mobile broadband working better than here ...

t0nyt wrote: Mon Sep 08, 2025 7:33 am

NormanDunbar wrote: Mon Sep 08, 2025 7:30 am Exactly. I laid out the pseudo code for a scanner near the start of this thread

I thought you had, but damned if I can find it

My bad, wrong thread! It's at viewtopic.php?p=66959#p66959 if you still need or want it.


Cheers,
Norm.

You don't have to actually read or write anything to detect an i2c device, you just send the address and detect the ACK.


Exactly. I laid out the pseudo code for a scanner near the start of this thread. There's a scanner "built in" to the Arduino IDE and I've written one in AVR C, plus another ...

Morning Dave,

Interesting post. And way above my knowledge, but I'll be following along.

Cheers,
Norm.

OK, thanks.

I haven't seen or used a Minerva Mk2 so I didn't know about the RTC or NV RAM. One of those will have the $50 address, not the Mk2 itself. My mistake.


Cheers,
Norm.

WARNING: The default ID is &50 which is the SAME device ID as the Minerva Mk2 so MUST be changed


This sort of implies that the Minerva MK2 can be communicated with, over I2C as a slave/peripheral device rather than as a controller. Anything in the docs to confirm this thought?

A master ...

A tracs and or debugger? Yes please!

Cheers,
Norm.

Hi Derek,

you would need a cross compiler, or Assembler on the QL, then a Ercall port that copes with 112500 baud and a version of "avrdude" to do the uploads over serial.

I don't think we can do this.

Cheers,
Norm.

Nicely commented source code Jan!

Cheers,
Norm.