Turbo Chameleon support

[sprudel79Participant]

Hi all,

I would like to ask if anybody was able to use the Turbo Chameleon together with the OSSC.
I am talking about that one:
http://amigastore.eu/en/251-chameleon-64.html

The Turbo Chameleon can be used either as a C64 cartridge or standalone.
When using it in a standalone manner there’s a VGA out provided at the cartridge.
So just for fun I was trying to connect it to the OSSC. On the OSSC display I was able to see some activity on the VGA IN port but I wasn’t able to see anything on my TV.
Does anybody else tried to use the Turbo Chameleon in the same way and could assist?

Thanks in advance and best regards,
Thomas

[BuckoA51Keymaster]

Can you let us know what the LCD displays when you try to use it?Also what is shown when you press the info button?

[sprudel79Participant]

Hi,
sorry for the late reply.
Here’s the information what the display is saying:

AV3: RGBHV 874p
52.63kHz 60.21Hz

Pressing Info button will show this:
VMod: 1280×1024
LO: 874 VSM: 0

Thanks!

[BuckoA51Keymaster]

Well, that’s definitely not right. Hmm.. can you try switching to another active input then back to VGA again?

[marqsParticipant]

The cart is probably outputting 1024×768 – right? OSSC excepts VESA timings (806 lines for 1024×768@60), but since 874 is too far from that it picks next mode (1280×1024) from the list. With 1280×1024 parameters, V.active ends up being too high to properly show on display. You’ll need to access adv.timing and copy 1024×768 parameters into 1280×1024 mode to fix this.

[sprudel79Participant]

Hi,
sorry for my late reply and many thanks for the replies.
But yesterday I had a chance to test this again. First, I updated to latest firmware 0.76.
There was no change in the behaviour.
@marqs: “You’ll need to access adv.timing and copy 1024×768 parameters into 1280×1024 mode to fix this.” -> how can I do this? I was playing around with the menu in order to change some parameters (without any impact). Where do I need to apply your fix exactly?

The Turbo Chameleon itself can be configured to produce different outputs (I think default mode is 800×600@72Hz). So it’s worth trying to change the output there as well.

Best regards,
Thomas

[marqsParticipant]

Adv. timing is found under sampling options. First select 1024×768 from the list via < -/-> buttons and write down all parameter values, then go back and select 1280×1024 and replace the values with the written down ones.

[sprudel79Participant]

Hi,

I have solved it by trying different settings directly in the Turbo Chameleon setup.
Since it’s offering approx. 10 different video modes I was able to find a few that work also with the OSSC!
The video mode I think is definitely the best is 640×480@60Hz.

Many thanks for your support and best regards,
Thomas

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