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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 (90.55 KiB) Viewed 726 times
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.....
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Re: dml attempts a Raven
Posted: 07 Jul 2025 17:05
by dml
- 20250707_164405.jpg (174.81 KiB) Viewed 726 times
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...
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Re: dml attempts a Raven
Posted: 07 Jul 2025 18:07
by dml
- vga-boot.jpg (205.32 KiB) Viewed 712 times