10 February 2021, 12:10 | #21 |
ex. demoscener "Bigmama"
Join Date: Jun 2012
Location: Fyn / Denmark
Posts: 1,624
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Test/development pcb for a video slot solution I'm working on that is aimed at all Amigas with video slot. It's prepared to support 24-bit colour, but some changes to the Pi firmware are needed - I haven't looked at that yet.
If this works out, most of the schematic can also be used for a solution that connects directly to Lisa (A1200), I think. As soon as I've confirmed this design won't kill my A4000, I will put everything up on github, although it's still WIP. |
10 February 2021, 12:31 | #22 | |
Registered User
Join Date: Jan 2020
Location: oslo/norway
Posts: 1,607
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Quote:
Hope it will work. |
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10 February 2021, 15:32 | #23 |
Registered User
Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 4,323
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This looks really, really nice. I was looking at the a1200 pinouts last week for the RGB colour bits. All 24 of them and the sync signal can be found on the DAC so it may be possible to do something similar as to what i done on the A600 but prob still need to tap into other signals. Hope you have good luck with this
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10 February 2021, 18:27 | #24 | |
ex. demoscener "Bigmama"
Join Date: Jun 2012
Location: Fyn / Denmark
Posts: 1,624
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Quote:
Denise clocks on both edges of either 7M or CDAC, or xor's them to get a 14MHz signal. I'm multiplexing between the hi/lo 4 colour bits in this design so it has 12 colour lines going into the Pi as per the original design from hoglet67 - the select signal for the multiplexing will come from the Pi, so the firmware can be changed to always use 24-bits, and then just leave it at the hi 4 bits all the time for 12-bit systems. Last edited by hooverphonique; 10 February 2021 at 23:35. |
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10 February 2021, 19:28 | #25 |
Blitter
Join Date: Aug 2017
Location: England
Posts: 50
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Great design @hooverphonique so clean.
Hoping a 1200 version is possible |
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