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Post by Bones on Nov 28, 2006 17:16:45 GMT 10
Hi,
Anyone know of any good cheap On Screen Display IC's.
I've got one of the old ST5730 chips but they have stopped production.
I'm looking at outputing to an analog TV set ontop of the normal picture.
Colour and graphics would be great but normal text will do.
Cheers
Bones
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Post by Dingo on Dec 1, 2006 19:51:42 GMT 10
Yeah, it used to be a lot easier to get OSD chips.
Have you looked at Dontronic's modules? I'm not sure if they use parts in stock these days.
I know the MC1377 was good, there is a supply of them at a shop in Sydney or you can buy the A520 TV-out module for Amiga 500s on eBay and cannibalise them. .....not really the best way I know......
If you need simple TV out, there are a few PIC/AVR projects out there for really simple fonts etc but I'm not sure how they go with sync-locking
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Post by Dingo on Dec 9, 2006 12:41:45 GMT 10
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Post by Dingo on Dec 30, 2006 20:47:34 GMT 10
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Post by Bones on Jan 2, 2007 13:59:08 GMT 10
Hi,
Cool thanks for that. I might grab one of those and have a play.
So what do you recon is it a PIC or an AVR?
Cheers
Bones
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Post by Robotman on Jan 2, 2007 18:51:14 GMT 10
My guess is that it's an ATMEL ATtiny25, ATtiny45, or ATtiny85. The power supply pins don't match for a PIC product, but they do match for the AVR product. Pin 3 is treated as special in the documentation for the 'STV2000', and that pin would be XTAL2 (crystal in) for the ATtiny, most likely with some special requirements (like the GP3,/MCLR,Vpp pin for the PIC12C508). I am leaning heavily towards the ATtiny85 because of the specs quoted for the video chip (RAM and EEPROM, and FLASH capacity).
That speechchip website has some real nostalgic value... dreaming of the Archer speech chip that I bought but was too inexperienced to know how to use it... I wonder where that chip ended up? Probably in a bin, way back in 1986 or sometime around then...
Cheers
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