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SIO devices which use clockin/clock out?

Added by foft over 4 years ago

Do any of you have any devices using these sio pins? They are not used by SIO2PC, SIO2SD, most disk drives and cassette players.

I need to check the implementation fpga side before testing, I have a feeling they are wrong at present.


Replies (15)

RE: SIO devices which use clockin/clock out? - Added by 917k over 4 years ago

I have an Alien Group speech synthesizer which I think uses the clock lines. I'll see if I can get things up and running enough to test this.

RE: SIO devices which use clockin/clock out? - Added by foft over 4 years ago

Great:)

Don't connect it yet, I need to verify these lines on the logic analyzer furst.

RE: SIO devices which use clockin/clock out? - Added by foft over 4 years ago

I added support here in the latest core and this works for Nir. Could you check too please?

RE: SIO devices which use clockin/clock out? - Added by sadosp over 4 years ago

foft wrote:

I added support here in the latest core and this works for Nir. Could you check too please?

One of these devices "SIO2USB RAF" USB stick device from Abbuc, checked before from Roy on version 1 board without luck.

RE: SIO devices which use clockin/clock out? - Added by 917k over 4 years ago

So does pin 12 of the SIO jack carry +12v as it does on the 400/800?

RE: SIO devices which use clockin/clock out? - Added by foft over 4 years ago

No, 12v is not connected. Didn't seem worth a regulator for that.

RE: SIO devices which use clockin/clock out? - Added by 917k over 4 years ago

Okay, so my Alien Group Voice Box is not going to work then, it is an earlier version without the external power jack.

RE: SIO devices which use clockin/clock out? - Added by sadosp over 4 years ago

917k wrote:

Okay, so my Alien Group Voice Box is not going to work then, it is an earlier version without the external power jack.

Hey, I think isn't so difficult to add directly a 12 volt 1 Ampere psu there! ;-)

RE: SIO devices which use clockin/clock out? - Added by Stephen over 4 years ago

sadosp wrote:

917k wrote:

Okay, so my Alien Group Voice Box is not going to work then, it is an earlier version without the external power jack.

Hey, I think isn't so difficult to add directly a 12 volt 1 Ampere psu there! ;-)

Especially if going down the route of using a mini-ITX power supply internal to the case. That will give a nice clean regulated 5VDC and 12VDC rail. With a relatively simple circuit, the front panel momentary contact button can also fully switch on the Eclaire, assuming the main switch remains on.

RE: SIO devices which use clockin/clock out? - Added by 917k over 4 years ago

I thought about that but these are pretty rare and somewhat valuable so I am reluctant to mod it.

RE: SIO devices which use clockin/clock out? - Added by ijor about 4 years ago

The Indus drive uses SIO clock out. I'm not very familiar with the Indus and I don't know the details, but I guess it uses the clock for automatically detecting the turbo baud rate (hence the name syncromesh?). There should plenty of information about it at Atariage.

I'm not sure any device uses SIO clock in. Some years ago I performed some tests trying to transmit to Pokey using synchronous mode and I found out is not very reliable. It works, but every so many bytes I got an error. Again, there is a thread at Atariage with the details and the results.

Interesting if Joe Decuir has any insider info about this (apparent) Pokey failure.

RE: SIO devices which use clockin/clock out? - Added by foft about 4 years ago

So... any Indus GTs out there to try? I guess if its just counting clock pulses to check baud it will work even if my timing isn't quite correct.

This thread? http://atariage.com/forums/topic/139769-sio-synchronous-mode/. phi2/3 with no errors is pretty good... I agree with the final comments, synchronising the external clock with phi2 may be required. Errors, even at a slow clock, could be down to meta-stability due to relationship between phi2 and external serial clock.

RE: SIO devices which use clockin/clock out? - Added by ijor about 4 years ago

Yes, that thread. IIRC, at some point somebody else made additional tests with same, or similar results.

RE: SIO devices which use clockin/clock out? - Added by RoyE over 3 years ago

sadosp wrote:

foft wrote:

I added support here in the latest core and this works for Nir. Could you check too please?

One of these devices "SIO2USB RAF" USB stick device from Abbuc, checked before from Roy on version 1 board without luck.

I have flashed the newest core so now my SIO2USB RAF now works as well as the SIO2PC, SIO2SD, and Sdrive..

RE: SIO devices which use clockin/clock out? - Added by foft over 3 years ago

Cool, thanks for testing Roy. Pleased to hear the SIO2USB works now.

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