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Re: dml attempts a Raven
Posted: 07 Jul 2025 15:43
by agranlund
dml wrote: 07 Jul 2025 15:08
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 :)
Re: dml attempts a Raven
Posted: 07 Jul 2025 16:18
by 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.
Re: dml attempts a Raven
Posted: 07 Jul 2025 16:38
by agranlund
dml wrote: 07 Jul 2025 16:18
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.
Re: dml attempts a Raven
Posted: 07 Jul 2025 16:58
by dml
agranlund wrote: 07 Jul 2025 16:38
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
Re: dml attempts a Raven
Posted: 07 Jul 2025 16:59
by dml
This is what I followed to the serial port from the UART.... can almost read the bits :p
bits.jpg
Re: dml attempts a Raven
Posted: 07 Jul 2025 17:04
by 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
Re: dml attempts a Raven
Posted: 07 Jul 2025 17:05
by dml
Re: dml attempts a Raven
Posted: 07 Jul 2025 17:30
by PhilC
Love the cable :lol: and great to see you have something on serial now
Re: dml attempts a Raven
Posted: 07 Jul 2025 17:34
by dml
Thanks PhilC - yep I think we're cooking now...
mon.jpg
Re: dml attempts a Raven
Posted: 07 Jul 2025 18:07
by dml