28 February 2021, 22:13 | #1 |
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Amiga 500 RGB to HDMI adapter accelerator compatibility
Howdy,
got one of those RGBtoHDMI adapters for socketed Denise (with Raspberry Pi Zero), but now that I have the parts at home (except the pi pin header), it seems it wont fit along the Blizzard Turbo memory /accelerator that sits in this particular A500 (I have a few). Now there are a few CPU relocators but most move the CPU up so it practically covers the Denise Chip. Any thoughts or solutions for this new combo (Denise Adapter, Internal Accelerator)? Id guess TF53x might have similar issues? I've seen a Denise relocator. Not sure how much difference it would do though. I've also seen some weird flexible CPU relocator.. |
01 March 2021, 19:46 | #2 |
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I was able to get it fit with just some 64 pin sockets (maybe two).
I can check over the weekend if no one else gets to it before. I was just test fitting it so I don't have an A500 set up like that at the moment... |
01 March 2021, 20:05 | #3 |
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Can you show pictures of how the card sits and how the RGBtoHDMI spoils with it?
I'm working on some RGBtoHDMI relocator boards and custom RGBtoHDMI boards that may help with these accelerator boards. |
02 March 2021, 00:31 | #4 | |
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Quote:
https://www.exretro.com/galleries/co...DMI/index.html |
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02 March 2021, 09:37 | #5 |
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02 March 2021, 10:22 | #6 | |
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Quote:
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02 March 2021, 11:01 | #7 |
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02 March 2021, 11:33 | #8 | |
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By offsetting the Pi board towards the back of the Amiga you solve this, so..much better :-) |
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03 March 2021, 23:16 | #9 |
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@solarmon Updated the "gallery" with 2 extra pics (last 2) now that I got the Raspberry Pi Zero with soldered header on..
https://www.exretro.com/galleries/co...DMI/index.html A regular Denise relocator *might* make it physically possible to squeeze the Pi board past the edge of the Blizzard board, but of course all ports on that sides are completely blocked, including the mini HDMI connector which of course renders this whole thing pointless ;-) Unless.. I build a tower of sockets for the adapter sao it reaches above the accelerator.. Right now the pins of the adapter are of course not pressed down into the Denise socket as it won't fit.. Last edited by eXeler0; 26 August 2023 at 23:57. Reason: URL went dead, updated it |
03 March 2021, 23:53 | #10 |
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@eXerler0
Thanks for the extra pictures - they are really useful to see the positioning of such boards. Definitely the Pi needs to be relocated to face either backwards or sideways. This is why I'm working of these relocator boards, and my custom RGBtoHDMI board. |
04 March 2021, 02:38 | #11 |
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how is this ?
I revamped the RGB2HDMI board for a few reasons, to make it fit in all machines with a DIP Denise and also to not interfere with accelerators and in this case other Pi's lol. The board has a few extras i added that i am testing out Last edited by kipper2k; 04 March 2021 at 02:53. |
04 March 2021, 08:39 | #12 | |
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Btw, what are your thoughts on how to route it out of the case in a nice way? (Drill a hole in the empty area behind the floppy is always an option I guess as is removing the left expansion lid.) |
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04 March 2021, 13:15 | #13 |
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What about heat coming from the Denise chip? Not an issue for the RPi hovering over it?
Perhaps it's possible to use a flex ribbon hdmi cable, something like link below. If you don't tighten the case lid to hard it should work or perhaps even more advanced desolder the mono RCA-jack from the mobo and get a cable or a micro-hdmi male connector through (or halfway through meeting a micro-hdmi socket in) the vacant hole. https://fyndiq.se/produkt/for-flexib...07d788a6f4caa/ |
04 March 2021, 14:04 | #14 | |
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The heat is not an issue, The Amiga custom chip warm up just as much as the Pi and Denise. I have left the Amiga on for hours with the lid closed with no issue.. There are many options for the HDMI cable, The cable i am using (from monoprice.com) is flexible enough to turn 90 degrees, there are also short adapter cables from Amazon... https://www.amazon.ca/CableCreation-...tronics&sr=1-6 I have thought about removing the mono RCA jack from the back. haven't decided yet, i could make a little double female adapter for where the cable leaves the case also. One thing to note, you do not need the video hybrid to be in place when using the HDMI out, so it makes for a good test if your Amiga is not outputting RGB. |
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07 March 2021, 20:54 | #15 |
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I finally re-checked the fitment today and no it doesn't fit well at all...
(What I had quickly tested before was TF534 on CPU relocator that was standing on three 64-pin sockets on top of the original (CPU) socket. There is no space for the HDMI cable (TF534 blocks it) and the metal shield doesn't fit or the case...) So looks like Kipper2k's re-designed PCB will be the way to go for me at least (as I guess it will be sporting FF-OSD headers built-in |
12 April 2021, 21:31 | #16 | |
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Quote:
https://linuxjedi.co.uk/2021/04/11/d...pld-rgbtohdmi/ Saluditos, Ferrán. |
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12 April 2021, 21:34 | #17 |
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12 April 2021, 21:52 | #18 |
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I have uploaded my KiCAD design files for my various RGBtoHDMI custom boards and adapters to:
https://github.com/solarmon/RGBtoHDMI |
12 April 2021, 23:05 | #19 | |
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17 August 2021, 09:53 | #20 |
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Talking about heat, saw yesterday in the menu that you can see the PI's cpu temp..it was 55C (I had put a heatsink on it). Wondering how hot the denise gets (put a heatsink on it anyway while I was there)..
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