dml attempts a Raven

[agranlund]

UART1:TXB from the 68752 is emitting clean bursts of data on reset and it is seen on UART1:TXB

Unless you have a logic analyzer with built-in decoding I suppose you could always capture it with the oscilloscope and manually decode what it's trying to say :)

[dml]

So rigged up the most sketchy serial cable possible - with what amounts to bare telephone wire with gold pin sleeves soldered on the ends - and linked it from the Raven to a spare Falcon - which isn't very well set up and can only manage 19200 on the modem port at the moment.

Anyway I'm seeing bursts of garbage in the Falcon's terminal that I wasn't seeing with the PC. I think if I can get a serial port set up properly at this end I can maybe capture what the Raven is trying to send.

[agranlund]

So rigged up the most sketchy serial cable possible - with what amounts to bare telephone wire with gold pin sleeves soldered on the ends - and linked it from the Raven to a spare Falcon - which isn't very well set up and can only manage 19200 on the modem port at the moment.

Anyway I'm seeing bursts of garbage in the Falcon's terminal that I wasn't seeing with the PC. I think if I can get a serial port set up properly at this end I can maybe capture what the Raven is trying to send.

I can build you a rom that talks 19200 but not until later this evening.

Or if you want to build the rom yourself you can find the baudrate define at the top of
https://github.com/agranlund/raven/blob ... on/_boot.S

You'll need gcc-13.3.0-mintelf from Thorsten to build the bootrom with monitor.
The normal non-elf toolchain is needed if you want to build the full thing with TOS included (I'm using version 13.3.0 there too)
I am only aware of people building this on MacOS but some other unixy environment may work too.

[dml]

I can build you a rom that talks 19200 but not until later this evening.

Thanks, that's excellent ...but ....wait!!! I'm not quite stuck yet....... new hardware brought to bear at the last minute! :p

[dml]

This is what I followed to the serial port from the UART.... can almost read the bits :p

bits.jpg

[dml]

....not messing around now! Frustration of PCs, Macs & PI's, off to the spare room with you all.

When you want to get something done, always use the right tools.

68040 TOS machine calling 68060 TOS machine.....

f040.jpg

link.jpg

r060.jpg

[dml]

20250707_164405.jpg

[PhilC]

Love the cable :lol: and great to see you have something on serial now

[dml]

Thanks PhilC - yep I think we're cooking now...

mon.jpg

[dml]

vga-boot.jpg