Quote from: cuberdon on Yesterday at 20:43socket is in , and both a low-ram-diagnostic and a 40009 copy have been made .The 40009 should have the firmware in the first 16k and BASIC in the second 16k. The pin that would be A15 on a 27C512 is not connected to anything on the 40009 (ie: like a 27C256), but of course if you tell the EPROM reader that it's a 64k chip it will tell you that it found the same thing twice, but the chip is only 32k and definitely only has one copy stored in it.
now waiting for the new powersupply to give the board 5volt and see what the signals say on the scope .
-verified the original 40009 rom , and it has 2 sets of software in it
Quote from: cuberdon on Yesterday at 11:17firstly i need to get something else than a black screen ...........................Ok, if the CPC already has issues, then start with a 27C256 with the correct image. Once you get it working you can decide if you want to expand it.
but i will modify the socket for multi-os .
Quote from: SerErris on Yesterday at 18:51The most important part is anyhow the placement of the board. I can see a pcb pdf document, however that is for the through hole version. I know there was a all SMD version, which I would prefer nowadays. It is anyhow only the large caps, that are non SMD and those are even as SMD pretty big and easy to solder.
If you do not find it, do not worry - I will just clone it from the original. The schematics is anyhow done, because of the Amiga project and I can just copy and paste it.
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